 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / Radio Controlled / Land Models / April 2006Lowering Nitro content
Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I need to take any precautions for the first little while? I'm only using my t-maxx for bashing. > Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I > need to take any precautions for the first little while? I'm only using my > t-maxx for bashing. Nah, won't do any harm, but you might need to re-tune slightly.  SignatureDan >> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I >> need to take any precautions for the first little while? I'm only using >> my t-maxx for bashing. > > Nah, won't do any harm, but you might need to re-tune slightly. I've actually heard that its bad to change nitro content from what the engine was run in with. This is due to the different burn temps and the piston/cylinder pinch. If the engine is run in with a fuel with a certain nitro content, the pinch is set to that burn temp. When you change nitro content, the temp changes, the pinch changes and you get less performance. All of this very very badly explained and feel free to correct. Cheers Dre >>> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I >>> need to take any precautions for the first little while? I'm only using [quoted text clipped - 11 lines] > > Cheers Dre If it's all a matter of temp, then the same would apply running 20% in the winter @ 200* cylinder head temps and 20% in the summer @ 280* cylinder head temps. Long and short, I think what you've heard is incorrect. Doc >>>> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I >>>> need to take any precautions for the first little while? I'm only using [quoted text clipped - 18 lines] > > Doc Yeah I wasn't totally convinced with it all either. But the article did have some good points. Like I said, I explained it badly. I wish I could find the article again... One question though, doesn't a higher percentage nitro burn hotter than a lower content nitro?? I was under the impression this was the case.. Cheers Dre >>>>> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will >>>>> I need to take any precautions for the first little while? I'm only [quoted text clipped - 28 lines] > > Cheers Dre It might make some difference, changing I mean, but to be fair, I've done it loads of times and it just means a quick re-tune. If you're that bothered about the temp been the same tho, you could just richen or lean it as appropriate :-) SignatureDan >>>>>> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will >>>>>> I need to take any precautions for the first little while? I'm only [quoted text clipped - 33 lines] > bothered about the temp been the same tho, you could just richen or lean > it as appropriate :-) To be honest its never bothered me either and I've done it to every single engine I currently have :) I went from 15% to 20% cause its easier to get down where I live. Just thought I'd mention it as it sounded plausable at the time. (still wish I could find the damn article!) Cheers Dre > Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I need > to take any precautions for the first little while? I'm only using my t-maxx > for bashing. If the engine manufacture recommends 20% then your best bet is to stick with what the manufacture calls for - Take into account that the timing of the engine is a combination of compression ratio, the flash-point of the fuel, and the glow plug characteristics.i.e. you risk loss of power as well as the possibility of engine seizure! >> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I > need [quoted text clipped - 9 lines] > the > possibility of engine seizure! Engine seizure? Do tell..........................<g> Doc > >> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I > > need [quoted text clipped - 11 lines] > > Engine seizure? Do tell..........................<g> sure if you advance the timing!! or better yet change the oil to fuel ratio!! Glow engines run at about 14 parts nitro/castrol oil mixture to one part air! By changing the fuel to 15% you change the characteristics of that engines design, thus causing unwanted results!! 15% nitro fuel is primarily designed for aircraft glow engines and thus carries a lower oil to fuel ratio! Aircraft glow engines don't require the amounts of fuel to oil ratios that is often required in an on-road or off-road glow engine.... > > >> Will it be much of a problem to go from a 20% to 15% nitro fuel? Will I > > > need [quoted text clipped - 16 lines] > sure if you advance the timing!! or better yet change the oil to fuel > ratio!! oops: next line is backwards i.e. should be 14 parts air to one part fuel mixture!! > Glow engines run at about 14 parts nitro/castrol oil mixture to one part > air! By changing the fuel to 15% you change the characteristics of that [quoted text clipped - 4 lines] > amounts of fuel to oil ratios that is often required in an on-road or > off-road glow engine.... Are you sure of these ratios? Gasoline race engines (full size, not models) run at 14:1. when we convert to Alcohol, consumption doubles. Since model fuel is part nitro, mostly alcohol, wouldn't it be closer to 7:1? Secondly, The nitro content wont alter the amount of fuel, yet the volatility will change, which could have an effect on theoretic timing. The catch to the timing deal is there is no ignition system to alter the timing. The engines basically diesel there way through life. The point at which combustion occurs is relative to when there is enough compression to ignite the mixture. But then again, I might be talkin out of my arse... GERRY >> > >> Will it be much of a problem to go from a 20% to 15% nitro fuel? >> > >> Will [quoted text clipped - 34 lines] >> amounts of fuel to oil ratios that is often required in an on-road or >> off-road glow engine.... > Are you sure of these ratios? Gasoline race engines (full size, not models) > run at 14:1. when we convert to Alcohol, consumption doubles. Since model More like 14.7:1!! > fuel is part nitro, mostly alcohol, wouldn't it be closer to 7:1? NO! > Secondly, The nitro content wont alter the amount of fuel, yet the > volatility will change, which could have an effect on theoretic timing. 20% Nitro = 20% castrol oil, about 10% nitromethane, about 70% would be methanol and the manufactures secret additives! > The catch to the timing deal is there is no ignition system to alter the > timing. The engines basically diesel there way through life. The point at > which combustion occurs is relative to when there is enough compression to > ignite the mixture. here's a great site that may help you! http://wwnh.net/content/view/36/1/ > 20% Nitro = 20% castrol oil, about >10% nitromethane, about 70% would be > methanol and the manufactures secret >additives! Fuel rated at 20% Nitro contains 20% Nitromethane (or at least it should), not 10% . It may or may not contain 20% lubricant. It may or may not contain any castrol oil. Castrol is a brand name. Tom > > 20% Nitro = 20% castrol oil, about >10% nitromethane, about 70% would be > > methanol and the manufactures secret >additives! > > Fuel rated at 20% Nitro contains 20% Nitromethane (or at least it should), > not 10% . It may or may not contain 20% lubricant. It may or may not > contain any castrol oil. Castrol is a brand name. LOL - your absolutely correct I got it backwards - c'mon you guys you know what I mean castor oil not castrol oil!! It's an aging thing - my memory has been going south for the past few years! ;-) >> Are you sure of these ratios? Gasoline race engines (full size, not >models) >> run at 14:1. when we convert to Alcohol, consumption doubles. Since model > >More like 14.7:1!! Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf will show you that more than twice as much methanol is needed than gasoline.. . . .6.45:1 to be exact as opposed to Gasoline's 14.7:1. . . Nitromethane requires a 1.7:1 ratio for efficient combustion. . .use a mix of 80% methanol and 20% nitro, and your optimum ratio would be 5.5:1. . . Of course that will change some once you add the oil to the mix. . . .not sure how though. .. >> fuel is part nitro, mostly alcohol, wouldn't it be closer to 7:1? > >NO! Uhhh, YES. . .. >> Secondly, The nitro content wont alter the amount of fuel, yet the >> volatility will change, which could have an effect on theoretic timing. > >20% Nitro = 20% castrol oil, about 10% nitromethane, about 70% would be >methanol and the manufactures secret additives! Changing the nitro content WILL change the required needle settings. . . the more nitro in the fuel, ,, the more fuel is needed (or rather, the less air is needed). . .. 20% Nitro means that 20% of the fuel is , , , ,nitromethane. .. . Nitro content has little to do with oil content. . . BTW, It's CASTOR oil, ,, , not CASTROL, ,, , , Castor oil is a vegetable oil made from teh castor bean, , , ,CASTROL is the brand name of a oil-product manufacturing company. . . Dig around Here: http://www.morganfuel.com for some info on fuel blends. . . >> The catch to the timing deal is there is no ignition system to alter the >> timing. The engines basically diesel there way through life. The point at [quoted text clipped - 4 lines] > >http://wwnh.net/content/view/36/1/ So, my original post (Reposted below) is at least close to correct? *Are you sure of these ratios? Gasoline race engines (full size, not models) *run at 14:1. when we convert to Alcohol, consumption doubles. Since model *fuel is part nitro, mostly alcohol, wouldn't it be closer to 7:1? *Secondly, The nitro content wont alter the amount of fuel, yet the *volatility will change, which could have an effect on theoretic timing. *The catch to the timing deal is there is no ignition system to alter the *timing. The engines basically diesel there way through life. The point at *which combustion occurs is relative to when there is enough compression to *ignite the mixture. >>> Are you sure of these ratios? Gasoline race engines (full size, not >>models) >>> run at 14:1. when we convert to Alcohol, consumption doubles. Since >>> model >>More like 14.7:1!! > Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf [quoted text clipped - 42 lines] >> >>http://wwnh.net/content/view/36/1/ >So, my original post (Reposted below) is at least close to correct? > [quoted text clipped - 10 lines] >*which combustion occurs is relative to when there is enough compression to >*ignite the mixture. Yes, prtetty close. The only thing missing, is that any given tune will be leaner if you change to a fuel with a higher nitromethane percentage. You can figure this out like this: 90% methanol and 10% nitromethane: 6.45 X .90 = 5.805 (methanol) + 1.7 X .10 = .17 (Nitromethane) = 6.505 So a 10% Nitro mix would be optimum at 6.505 parts air for every part of fuel. . . A 30% mix would be like this: 6.45 X .70 = 4.515 (methanol) + 1.7 X .30 = .51(Nitromethane) = 5.025 30% Nitro mix would be optimum at 5.025 parts air for every part of fuel. . . Like I said before, The lubricant will change this, , , ,not sure how though. One way to look at it is that higher percentage fuel makes the tune leaner, and if you don't adjust for it, the engine will run hotter, and thus, the timing will appear to be advanced, since ignition will occour sooner in the cycle. . . > Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf > will show you that more than twice as much methanol is needed than > gasoline.. . . .6.45:1 to be exact as opposed to Gasoline's 14.7:1. . > . Nitromethane requires a 1.7:1 ratio for efficient combustion. . .use That's true and thus at the stochiometric 1.7:1 air/fuel mixture for nitromethane the flame temp. is around 7000 degrees F!!! Manufactures use methanol to dilute nitromethane down to a better more desirable temp/power output level Adding oil as well the manufactures secret additives increases the amount of airflow needed to produce the bang needed for it's particular application - perhaps something like 14:1 idono the exact ratio am not a chemist. Not interested in arguing with you - the point of the matter is that the OP should stick with the manufactures recommended fuel rather than changing to 15% Nitro for better fuel economy! >> Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf >> will show you that more than twice as much methanol is needed than [quoted text clipped - 9 lines] >airflow needed to produce the bang needed for it's particular application - >perhaps something like 14:1 idono the exact ratio am not a chemist. You are still wrong. .. . You are saying that once a manufacturer adds 16% or so oil into the batch, that they require less than half as much fuel in the mix. . . .in all reality they should need MORE, since the fuel is being diluted with oil. . . . Please. . . .show us some references, , , , where did you get 14:1 from? The reason I am persuing this discussion, , ,is because mis-information in this perticular catogory is liable to cost someone money. I for one am all for keeping this NG full of FACTS, , ,not opinions labeled as facts. . . >Not interested in arguing with you - the point of the matter is that the OP >should stick with the manufactures recommended fuel rather than changing to >15% Nitro for better fuel economy! There is no reason to do so, ,, , you are spreading false information. . . .. And, , , ,the manufacturer reccomends 10% - 20%, so the OP is NOT going against that. . .Who mentioned fuel economy? > >> Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf > >> will show you that more than twice as much methanol is needed than [quoted text clipped - 17 lines] > Please. . . .show us some references, , , , where did you get 14:1 > from? LOL I made it up! perhaps is lower I don't know - you guys are a bit too much - LOL Experience and common sense tells me that it's something like that Hypothetically, if it were something like 8:1 which would mean that there's quite a bit of fuel in the engines crankcase as well as its combustion chamber. How long do you suppose this would last in a rc application @ 24000 - 36000 rpms?? > The reason I am persuing this discussion, , ,is because > mis-information in this perticular catogory is liable to cost someone [quoted text clipped - 6 lines] > > > There is no reason to do so, ,, , you are spreading false information. NO!!! Again 15% is made for aircraft and not for on-road vehicles!! > . . .. And, , , ,the manufacturer reccomends 10% - 20%, so the OP is > NOT going against that. . .Who mentioned fuel economy? Perhaps you misread the manufactures recommendations i.e. it's NOT 10 to 20% which would include 15%!! More like 10, 16, 20, 30, 35% and even higher levels are made for on-road vehicles!! I don't know as the reason why am not the manufacture nor am I a chemist and not going to sit here and explain something that I don't know that much about. >> >> Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf >> >> will show you that more than twice as much methanol is needed than [quoted text clipped - 25 lines] >much - LOL >Experience and common sense tells me that it's something like that Well, your experience and common sense has failed you then, because you are wrong. . . . Where exactly did you get the 14:1 from? >Hypothetically, if it were something like 8:1 which would mean that there's >quite a bit of fuel in the engines crankcase as well as its combustion >chamber. How long do you suppose this would last in a rc application @ >24000 - 36000 rpms?? I am not sure what you are trying to say there. . . .yes, , there will be fuel in the crankcase and combustion chamber, , ,that is how these engines run. .. . how long do I suppose it will last. .. . well, , , , as long as there is fuel available, , ,a properly working glow plug and resonable tempatures, , ,for as long as it can. . . .. >> The reason I am persuing this discussion, , ,is because >> mis-information in this perticular catogory is liable to cost someone [quoted text clipped - 10 lines] > >NO!!! Again 15% is made for aircraft and not for on-road vehicles!! WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG! Jees. .. You can find ANY nitro % fuel designed for ANY application.....There is 15% general purpose fule, truck/buggy fuel, , aero fuel, and heli fuel. Here are some examples. .. . . http://www.morganfuel.com/cp_blends.htm http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJC49&P=0 http://www.looksmartsportsautos.com/p/articles/mi_qa3825/is_200207/ai_n9113753 If you want people to believe what you post, , ,link to some supporting documentation. . . . >> . . .. And, , , ,the manufacturer reccomends 10% - 20%, so the OP is >> NOT going against that. . .Who mentioned fuel economy? [quoted text clipped - 3 lines] >More like 10, 16, 20, 30, 35% and even higher levels are made for on-road >vehicles!! WTF are you trying to point out there? Yes, it is 10 to 20% reccomended, , , ,think about what you are trying to say.....You are saying that a perticular engine can use 10, 16, 20, 30 and so on percentages of nitro content in their fuel, , ,but somehow 15% magically does them harm. .. . >I don't know as the reason why am not the manufacture nor am I a chemist and >not going to sit here and explain something that I don't know that much >about. Then stop trying to pass information you pulled out of your a.s as facts. . .. Jees, , ,that's the whole point here, , ,, you're pulling facts out of your a.s, , ,and you are going to mis-lead someone.... > >> >> Wrong, , ,, , This: http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf > >> >> will show you that more than twice as much methanol is needed than [quoted text clipped - 28 lines] > you are wrong. . . . > Where exactly did you get the 14:1 from? From mathematical computations! > >Hypothetically, if it were something like 8:1 which would mean that there's > >quite a bit of fuel in the engines crankcase as well as its combustion [quoted text clipped - 6 lines] > as long as there is fuel available, , ,a properly working glow plug > and resonable tempatures, , ,for as long as it can. . . .. If I explain it to you you'll discount as being utter nonsence i.e. I'm not going to go thru the trouble - so I give the plate to you i.e. use your knowledge and figure it out for yourself... your findings may astonish you! > >> The reason I am persuing this discussion, , ,is because > >> mis-information in this perticular catogory is liable to cost someone [quoted text clipped - 16 lines] > purpose fule, truck/buggy fuel, , aero fuel, and heli fuel. Here are > some examples. .. . . Sorry but your misinformed! 15% nitro is made for aircraft and the general purpose 15% nitro fuel you refer to is for flying things, aircraft or perhaps copters and has never been made for land vehicles. > http://www.morganfuel.com/cp_blends.htm > http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJC49&P=0 http://www.looksmartsportsautos.com/p/articles/mi_qa3825/is_200207/ai_n9113753 > If you want people to believe what you post, , ,link to some > supporting documentation. . . . Those three links support what I have been saying all along i.e. 15% Nitro is for aircraft only!!! Try this because I am sure that these people are a bit more knowledgeable that you are. Try telling this to your LHS and see what they tell you. Any LHS will say the exact same thing I keep trying to tell you, 15% Nitro has and always will be made for just Aircraft and anything else that flies. However, as you can see from the links above there are manufactures that provide 10% and 16% nitro fuels made just for land based vehicles! I know this sounds a bit crazy but whether you like it or not that's the way it is and has always been!!!!! >> >> >> Wrong, , ,, , This: >http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf [quoted text clipped - 34 lines] > >From mathematical computations! Then post it. . . .. . . >> >Hypothetically, if it were something like 8:1 which would mean that >there's [quoted text clipped - 11 lines] >going to go thru the trouble - so I give the plate to you i.e. use your >knowledge and figure it out for yourself... your findings may astonish you! There's nothing left to figure out, , ,you've not proven anything, you've not posted your calculations (I have), you have not provided any backup documentation (I have). You expect me, after all that, to prove your case for you, , , , which you can't even do yourself? >> >> The reason I am persuing this discussion, , ,is because >> >> mis-information in this perticular catogory is liable to cost someone [quoted text clipped - 22 lines] >purpose 15% nitro fuel you refer to is for flying things, aircraft or >perhaps copters and has never been made for land vehicles. Read it again. . . .I have yet to see you post ANY supportive documentation to your claims. . . .That is because you have none. . . . . >> http://www.morganfuel.com/cp_blends.htm >> http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJC49&P=0 [quoted text clipped - 6 lines] >Those three links support what I have been saying all along i.e. 15% Nitro >is for aircraft only!!! Then you have a problem reading. . . .Here's just one example of your inability to accept that fact that you are wrong: BYRON ORIGINALS Race Fuel Byron Race Fuel is available in a wide variety of blends for serious and sport RC car drivers. Competitive blends range from 10 percent nitro (Race 1000) to 30 percent (Race 3000). Race 1600 (16% nitro) and Race 2500 (25% nitro) are specially blended to meet IFMAR- and EFRA-sanctioned racing requirements, RACE 1500 (15% nitro and 18% lube packaging) is available to meet specific manufacturer warranty requirements. All Byron RACE Fuels come in gallons and half gallons. RC Car. . . .. 15%. . . .. . >Try this because I am sure that these people are a bit more knowledgeable >that you are. Try telling this to your LHS and see what they tell you. Any [quoted text clipped - 4 lines] >this sounds a bit crazy but whether you like it or not that's the way it is >and has always been!!!!! I did ask my LHS, they also said you were wrong. . .. . you still have yet to post ANY supporting documentation . . . .. . If you can't provide any documentation suporting your claim, , then don't bother replying. . .. . . > >> >> >> Wrong, , ,, , This: > >http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf [quoted text clipped - 36 lines] > > Then post it. . . .. . . NO! You should be able to figure it out for yourself!! > >> >Hypothetically, if it were something like 8:1 which would mean that > >there's [quoted text clipped - 14 lines] > There's nothing left to figure out, , ,you've not proven anything, > you've not posted your calculations (I have), you have not provided BS you found that info during one of your searches... > any backup documentation (I have). You expect me, after all that, to > prove your case for you, , , , which you can't even do yourself? LOL just what I thought i.e. it's pointless replying to you... > >> >> The reason I am persuing this discussion, , ,is because > >> >> mis-information in this perticular catogory is liable to cost someone [quoted text clipped - 51 lines] > > RC Car. . . .. 15%. . . .. . LOL If you actually knew what you were talking about you would know that 15% nitro WITH 18% lube is for prop driven type devices and isn't made for your normal everyday land based vehicle. That RACE 1500 is for specialty vehicles that use a prop or turbines for propulsion - don't believe me, I don't give a rats a.s. Try using it in your own land based vehicle and see what happens... > >Try this because I am sure that these people are a bit more knowledgeable > >that you are. Try telling this to your LHS and see what they tell you. Any [quoted text clipped - 6 lines] > > > I did ask my LHS, they also said you were wrong. . .. . ROTFLMAO!! BS... I just hope that the OP can figure this out for himself rather than listening to your ludicrous incantations... I concede! >> >> >> >> Wrong, , ,, , This: >> >http://www.eere.energy.gov/afdc/pdfs/fueltable.pdf [quoted text clipped - 46 lines] > >NO! You should be able to figure it out for yourself!! I did, and I posted it, , ,you did not. .. . >> >> >Hypothetically, if it were something like 8:1 which would mean that >> >there's [quoted text clipped - 19 lines] > >BS you found that info during one of your searches... whatever. . . . >> any backup documentation (I have). You expect me, after all that, to >> prove your case for you, , , , which you can't even do yourself? > >LOL just what I thought i.e. it's pointless replying to you... Again, ,, nothing backs up your claim, , ,and somehow you are trying to imply that is MY fault, , , , I especially like the "figure it out yourself" when you can't provide one shred of information backing up the BS you keep pulling out of your a.s. . . . >> >> >> The reason I am persuing this discussion, , ,is because >> >> >> mis-information in this perticular catogory is liable to cost [quoted text clipped - 64 lines] >a rats a.s. Try using it in your own land based vehicle and see what >happens... wrong, , ,AGAIN. . .. another BS line of yours, , , pulled straight out of your a.s. . .. http://www.byronfuels.com/pages/products.html Proving that you are wrong is getting old and boring. . . . >> >Try this because I am sure that these people are a bit more knowledgeable >> >that you are. Try telling this to your LHS and see what they tell you. [quoted text clipped - 11 lines] > >ROTFLMAO!! BS... OK, you have shown absoloutly NO proof, no documentation to disprove the information and documentation I have posted, , ,and now, , ,all the better you can do is call me a liar. . .. >I just hope that the OP can figure this out for himself rather than >listening to your ludicrous incantations... Yea, , ,so ludacrous that I can provide supporting documentation and mathematical proof, , ,something you have yet to do one bit. . .. >I concede! Jees. . . . >> Engine seizure? Do tell..........................<g> > [quoted text clipped - 9 lines] > amounts of fuel to oil ratios that is often required in an on-road or > off-road glow engine.... You took the bait, and the conversation that ensued between you and other more knowledgeable members of this forum proved you have no clue what you're talking about. Perhaps you should stick to giving advice on subjects you are knowledgeable in? Doc > >> Engine seizure? Do tell..........................<g> > > [quoted text clipped - 14 lines] > talking about. Perhaps you should stick to giving advice on subjects you > are knowledgeable in? Huh! Troll - PLONK!!! >> >> Engine seizure? Do tell..........................<g> >> > [quoted text clipped - 19 lines] > >Huh! Troll - PLONK!!! Doc is NOT a troll. . .. He's a reg here, , ,and from what I see, , , ,one that is tired of hearing of people ruining perfectly good parts because some noob followed someone's advice that was, , , , well, , , ,pulled out of their a.s and not founded in facts. .. >>> >> Engine seizure? Do tell..........................<g> >>> > [quoted text clipped - 28 lines] > because some noob followed someone's advice that was, , , , well, , , > ,pulled out of their a.s and not founded in facts. .. I concur. SignatureDan > >> >> Engine seizure? Do tell..........................<g> > >> > [quoted text clipped - 24 lines] > because some noob followed someone's advice that was, , , , well, , , > ,pulled out of their a.s and not founded in facts. .. I used to come here on a regular basis!! not only that but there USED to allot more posts here LOL all the regulars have left - Gee I wonder why.... >> >> >> Engine seizure? Do tell..........................<g> >> >> > [quoted text clipped - 35 lines] > allot more posts here LOL all the regulars have left - Gee I wonder > why.... There is a lack of posters on here these days, and all us regs seem to have Savages! We need some Revo/LST/Maxx/MGT owners to argue with :-) SignatureDan > > You took the bait, and the conversation that ensued between you and other > > more knowledgeable members of this forum proved you have no clue what [quoted text clipped - 3 lines] > > Huh! Troll - PLONK!!! No doc has been consitently most helpful on this NG. I should know as I've needed nothing but advice. I think it is you who is the troll. A quick google will show doc as a regular helpulf poster. A google will show you to have only just turned up. Now f.ck off and do one. > > > You took the bait, and the conversation that ensued between you and > other [quoted text clipped - 9 lines] > google will show doc as a regular helpulf poster. A google will show you to > have only just turned up. Now f.ck off and do one. PLONK!! > > >> Engine seizure? Do tell..........................<g> > > > [quoted text clipped - 19 lines] > > Huh! Troll - PLONK!!! I'm still trying to figure out how 15% nitro fuel is primarily designed for aircraft glow engines. I can understand how 15% nitro fuel with a oil content suited to aircraft engines is suited to aircraft engines but why would all fuel be the same and be designed for the one form of model engine??? Confused??? Cheers Richard > > > >> Engine seizure? Do tell..........................<g> > > > > [quoted text clipped - 31 lines] > > Confused??? http://www.rchobbies.org/understanding_fuel.htm a much nicer bunch of people over here >> http://www.rcuniverse.com/forum/forumid_225/tt.htm > I'm still trying to figure out how 15% nitro fuel is primarily designed > for [quoted text clipped - 7 lines] > Cheers > Richard You're confused because what you were told was wrong. 15% nitro fuel is NOT primarily designed for aircraft glow engines. I know alot of guys who run 15% in their land vehicles because it's cheaper than 20% and they don't really care about the added performance 20% offers for backyard bashing purposes. Hell, you could run 10% in your stuff if you really wanted to. The main concern with any fuel is OIL content, and that is what differentiates land vs. aircraft fuels. Land fuels are typically 18% oil or lower, whereas air fuels are typically 18% or higher. Oil content (or rather lack thereof) is what can cause an engine to grenade. Granted, too much nitro will snap a rod if the compression ratio isn't lowered by adding head shims, but this is rare. When switching between nitro contents, say anywhere from 10-25% in a land vehicle, all that is required is a quick retune and maybe a different glow plug suited to the cooler/hotter fuel to keep the ignition timing in sync. It will not blow up your engine as suggested by other posters on here. Does your 1:1 scale car or truck blow up when you switch from 89-93 octane? Doc Ahh Cooler, more informed minds reign..... Ive built a buch of 1000 hp plus chevys, and thought the same principles applied... GERRY >> I'm still trying to figure out how 15% nitro fuel is primarily designed >> for [quoted text clipped - 30 lines] > > Doc > Ahh Cooler, more informed minds reign..... > > Ive built a buch of 1000 hp plus chevys, and thought the same principles > applied... > > GERRY Us 1:1 gearheads tend to be a bit more knowledgeable than the folks on here who have only wrenched on wee little glow engines. I too have built many Chevy smallblocks and bigblocks; when you understand the general concepts of internal combustion engines you tend to understand the simpler motors a bit better as well. After all, our nitro engines are essentially 2-stroke diesels. With 1:1 motors we up compression with different pistons and/or heads with smaller combustion chambers; with nitro we add nitro content (nitromethane is non-compressible). With higher compression 1:1 engines high octane fuel and/or retarted base timing is necessary to control detonation; with nitro we use a cooler glow plug to retard ignition timing. Same general principles that apply to all liquids that go boom...............just a different way of controlling them. Folks on here tend to drastically overly complicate the workings of a nitro engine and the dynamic fuel/oil/nitro plays on the engine. After all, these are the simplest little motors around. IMHO, you don't really know how to tune an engine until you've built your very own 454 with an 8-71 sitting on top with dual 1050's trying to suck you into the motor! Doc 1050's? Throw a set of hillborn stacks on there, bolt it into a 1300 lb altered, and have at it! Now try to tune that beast.. Mechanical injection, with alky GERRY >> Ahh Cooler, more informed minds reign..... >> [quoted text clipped - 30 lines] > > Doc > 1050's? Throw a set of hillborn stacks on there, bolt it into a 1300 lb > altered, and have at it! Now try to tune that beast.. Mechanical > injection, with alky > > GERRY That's beyond my skill level Gerry! Never got into Hillborn or Alky; most of my builds were pump friendly NA motors with a few blown ones here and there. Sounds like you built em' for bracket racing huh? I mostly built for street and modified street use. Doc Yea, all brackets. Ran a business building bracket cars until money got to tight for everyone >> 1050's? Throw a set of hillborn stacks on there, bolt it into a 1300 lb >> altered, and have at it! Now try to tune that beast.. Mechanical [quoted text clipped - 8 lines] > > Doc > Folks on here tend to drastically overly complicate the workings of a > nitro engine and the dynamic fuel/oil/nitro plays on the engine. After > all, these are the simplest little motors around. But that happens everywhere, and in theory it could be right. However, in the real world and with practical experience, we all know that it doesn't actually matter if you change your fuel, you just re-tune and away you go :) SignatureDan >> I'm still trying to figure out how 15% nitro fuel is primarily designed >> for [quoted text clipped - 14 lines] > bashing purposes. Hell, you could run 10% in your stuff if you really > wanted to. Heh, I've run 10 before :-) SignatureDan >> You're confused because what you were told was wrong. 15% nitro fuel is >> NOT primarily designed for aircraft glow engines. I know alot of guys [quoted text clipped - 4 lines] > > Heh, I've run 10 before :-) With a hot enough plug our motors would run on 5%. The performance would blow, but they'd run. Doc |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.