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Model Forum / Radio Controlled / Land Models / November 2005My Savage found 1st gear finally!
Well I did anyway, last time I had the transmission apart (when I replaced the bent chassis plates) I adjusted the shift points for 2nd and 3rd (by half a turn on both screws!) and holy crap, I have a new truck! The whole time I have been tuning and getting the thing sorted it has been stuck in 2nd (and occasionally getting into 3rd, on very loose gravel, 3rd gear grub screw was too tight). Now that it starts in first its a weapon! Wheelie city, and on concrete can leave skid marks when I put on a big power slide :) TOTALLY AWESOME! So after I had run around 2/3rds of the tank of fuel, I left it sitting there idling, idled for around 40 seconds before it stalled out (with no change in tone, which I thought wasn't too bad). I also notice that it will fuel up when left for a little while (say 5 seconds). Can I tweak the LSN a bit more (say 1/6th of a turn leaner) to make that time longer? Also, the slit in the front tire didn't get any bigger :) This w/e I'm heading up to my mates place 2 hours away for drinks and bbq. His place backs onto a big paddock which I will be using to find 3rd gear and see how fast this thing goes, cant bloody wait :) My Inferno is also coming, which will be interesting to see against the mighty Savage! Cheers Dre > Well I did anyway, last time I had the transmission apart (when I replaced > the bent chassis plates) I adjusted the shift points for 2nd and 3rd (by [quoted text clipped - 25 lines] > > Cheers Dre I'd go 1/8 in on the LSN at a time until you get the "lean cackle" then back it off 1/4 turn. You'll hear the lean cackle at off-idle throttle and after a long, high-speed run as it returns to idle. Mine will idle all day long w/o stalling, although it does load up after a few minutes and blows a nefarious amount of oil and smoke everywhere after sitting for awhile. Doc > > Well I did anyway, last time I had the transmission apart (when I replaced > > the bent chassis plates) I adjusted the shift points for 2nd and 3rd (by [quoted text clipped - 33 lines] > > Doc Your allowed to make them cackle?!?? I was told that was too lean, however that was 5 odd years ago, non abc type .12 size engine :) (mind you, you did say to back it off 1/4 turn after that) Righto then! lean the bastard out even more! I like it :) I was hell surprised at how easily it started too, and idled, and run, had it sitting around 135-145deg C the entire run. HPI must have set my 2nd gear grub screw soooo loose, I had to turn it in 1.5 turns to get it into a usable state, but now that the thing has 1st gear its insane. It did show up a new problem I have and its quite severe. On loose gravel (which is what I drive on 99% of the time) when I give the truck a heap of throttle or full power and steer, the truck will body roll and when it does, the inside wheels will break traction something fierce and I'll loose most of my power to those wheels. Last night was a real eye opener as I've been driving my E-maxx flat out since, which has a rear locker and accelerates so quick on gravel its not funny. I guess I need to get off my arse and get some 1/8th scale torsens in there. Dribble dribble dribble, I'm good at that :) Cheers Dre >> > Well I did anyway, last time I had the transmission apart (when I > replaced [quoted text clipped - 74 lines] > > Cheers Dre Just lean it till, when you do a long, long WOT run on the flat it dies at the very top end, then back it off a quarter. That's how i play it. Gotta tune my 2 speed when i get back for xmas. After the 16th expect many, many pics and vids of my Sav been abused :)  SignatureDan > >> > Well I did anyway, last time I had the transmission apart (when I > > replaced [quoted text clipped - 79 lines] > tune my 2 speed when i get back for xmas. After the 16th expect many, many > pics and vids of my Sav been abused :) Well this w/e will be perfect for high speed runs so with a bit of luck, I'll have nailed the tune down perfect :) I'll try and get some footage on the w/e too, but my mates are hopeless when it come to actually pressing the record button, they just stand there gawking with the camera in their hands pointing at the groung :) Look forward to the pics!!! (and vids, keen to hear if yours sounds the same as mine) Cheers Dre >> >> > Well I did anyway, last time I had the transmission apart (when I >> > replaced [quoted text clipped - 111 lines] > > Cheers Dre Dan was referring to HSN while you were asking about LSN. IMO, if it dies at WOT even after a long run, the HSN is too lean. You're also damaging the engine at that point. If there's not enough fuel to support a proper burn there's not enough oil to properly lubricate the engine. So, leaning the HSN to the point of lean-stalling it then backing off 1/4 turn is not a great idea IMO as you've already damaged the engine. Now, leaning the LSN to the point of cackling is another story! If it's cackling it's lean, but it's still got enough fuel to support combustion and lubricate the engine. PLUS, lean cackle due to LSN happens in a no-load, low RPM setting, so no engine damage is done. To tune an engine, I usually use temp and performance as a gauge for HSN settings, then sound and performance for LSN. Doc > >> >> > Well I did anyway, last time I had the transmission apart (when I > >> > replaced [quoted text clipped - 128 lines] > > Doc Roger that. I wasn't going to touch the HSN, only the LSN, which is what I thought Dan was talking about (but reading it again now, your right). I tune HSN with a temp gun and am usually a bit generous when it comes to temps (ie I tend to tune it a bit cooler, not on purpose though :) Either way, I think I have the HSN set right as I can have the truck at full revs all day long and the temps only get to 145 tops, average around 140 and if I let it sit there and idle away it'll come down to around 130 (which is another potential indicator that the LSN is a bit rich). I'm going to start with an 1/8th of a turn in on the LSN and see how I go... Cheers Dre > Roger that. I wasn't going to touch the HSN, only the LSN, which is what > I [quoted text clipped - 14 lines] > > Cheers Dre Good luck bud! We got 2" of snow this evening so it looks like r/c action will be on hold for me for the next few months..............planning to stock up on bits for both of my trucks over the winter so come spring I have lots of new stuff to play with. Doc > > Roger that. I wasn't going to touch the HSN, only the LSN, which is what > > I [quoted text clipped - 21 lines] > > Doc Cheers! I'm quite happy take over Global Savage Domination by annoying everyone down here for the summer :) Tire chains? LOL! Sounds like a plan re the bits, by the time spring comes round again, you'll have a beast from HELL! (and it'll be angry, it hasn't been run for ages! :) Bought time we had some nicer weather, winter was very very wet. This summer however is forcast to be the hottest driest summer we have ever had, ever since they started recording the weather!?!?! holy crap! Cheers Dre >> > Roger that. I wasn't going to touch the HSN, only the LSN, which is > what [quoted text clipped - 47 lines] > > Cheers Dre Snow sounds like a reason to go out with the truck to me :-D! SignatureDan > >> > Roger that. I wasn't going to touch the HSN, only the LSN, which is > > what [quoted text clipped - 49 lines] > > Snow sounds like a reason to go out with the truck to me :-D! Hell yeah, and an excuse to get some tire chains :) Snow would be cool as I reckon, hmmm, I need a jump, no worries, get some snow! Cheers Dre > Snow sounds like a reason to go out with the truck to me :-D! I agree 100%! It's the 0* (farenheit) weather that keeps me inside. Doc > Dan was referring to HSN while you were asking about LSN. IMO, if it dies > at WOT even after a long run, the HSN is too lean. You're also damaging > the engine at that point. If there's not enough fuel to support a proper > burn there's not enough oil to properly lubricate the engine. So, leaning > the HSN to the point of lean-stalling it then backing off 1/4 turn is not > a great idea IMO as you've already damaged the engine. Oops yea - i was a bit drunk when i posted that :) Yea i was talking HSN, and i don't mean lean till it proper cuts, just till you get the first hint of it having issues, this may be the cackling you refer to :) > Now, leaning the LSN to the point of cackling is another story! If it's > cackling it's lean, but it's still got enough fuel to support combustion [quoted text clipped - 5 lines] > > Doc I've never owned a temp monitor actually, and i've never killed an engine yet :) I tune for sound as a rule. SignatureDan |
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