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Model Forum / Radio Controlled / Land Models / June 2005Savage sillyness
Hi all, just curious whether a stocko Savage with a Picco .26 engine (2.7hp @ 37000rpm) can pull wheelstands if you punch the throttle from standstill. I'm building up a custom Savage out of the one I just bought (which is mangled, long story) for $50AUS and I want this thing to be a bit wild. At the moment I'm looking at the Picco .26 engine, but will be swayed towards something with more grunt if this thing cant do a wheely, I know, I'm insane, but I love it :) Soooo to all those with Savages, well can yours? Do wheelstands that is? Thanks all! Cheers Dre > Hi all, just curious whether a stocko Savage with a Picco .26 engine > (2.7hp [quoted text clipped - 13 lines] > > Cheers Dre Dre, Is it a Savage 21 or 25/SS? The reason I ask, the 21 came with 14/52 gears (3.71:1) wheras the 25 and SS came with 15/49 gears (3.27:1). See here: http://www.hpiracing.com/graphics/instr/savagegears.jpg With the 3.71 gears it should be able to wheelie with the Picco .26 if you have it tuned right; with the 3.27 gears it will have a bit of trouble getting the front wheels off the ground. My stock Savage 25 with 3.27 gears and 2.5HP S-25 motor will pop them off the ground from a dead stop on level ground but won't wheelie. On any type of slope it'll pop the wheels up and hold them till I let off the throttle. If you want a wheelie machine, go with 13/52 gears (4.00:1); with that ratio anything 2.5HP or above will be a wheelie machine. Your top speed will suffer however with the numerically higher gear ratio. Doc > > Hi all, just curious whether a stocko Savage with a Picco .26 engine > > (2.7hp [quoted text clipped - 33 lines] > > Doc Excellent! Mine was an SS, but I actually have the diffs from a Savage 4.6 in there so they are the 4 spider diffs. Unsure of the ratio of these. If yours is lifting the fronts off the ground a little with the 3.27 gears I reckon I'll be right then. Even though the 4.00:1 gears sound very tempting, can allways put the 3 speed box in to get the top speed back :) I'll see how I go. Thanks very much! Cheers Dre > Excellent! > [quoted text clipped - 12 lines] > > Cheers Dre I'm going to be grabbing the three-speed later this week and will have it installed by next week sometime. I'm thinking that it should give me enough low-end oomph to get the front end off the ground with the 3.27's and still give me 10% more top-end speed. Even with the three-speed, the 4.00's would kill the top speed. Figure it this way, the 4.00's are 20% shorter than the 3.27's, and the three speed only adds 10% to the top-end, so you'd still be down 10% top-end speed from stock configuration. I'm not a big wheelie guy, I prefer blistering top-end speeds, so I'm likely going to drop the ratio to 3.06, which will keep the bottom end power right where it is now, but give me 20% higher top-speed than the current stock configuration. Doc > > Excellent! > > [quoted text clipped - 28 lines] > > Doc Great info. I'm not really into massive wheelies either but the thought of having enough power available to lift the fronts momentary under hard acceleration is too good to pass by! I'm real keen to get the 3 speed for a number of reasons, but I want to wait till I've run the truck a few times, just to get a feel for the 2 speed. I love the fact that it uses metal gears (looks like it from the pics anyways) and the fact that it *changes* gears TWICE!!! I have since found out that the diffs I have (from a 46) have a ratio of 17/47 (2.76:1) so thats going to be a problem. Do you happen to know if I can change the ratio of the diffs by simply swapping the crown/pinion but leaving the internals alone? That way I get the shorter diff ratio, but retain the strength of the 4 spider... I'm still waiting for a replacement manual (that was lost on top of everything else!) so thanks very much for all the info. Cheers Dre > > > Excellent! > > > [quoted text clipped - 56 lines] > > Cheers Dre Duh, I think I may have mixed things up. The 17/47 is the ratio of the spur/pinion not the bevelled crown/pinion gears attached to the diffs :) <oops> Anyways, made my day cause now I can use the 4 spider diffs with any ratio I want. Since the truck was an SS, it has 15/49 gears in it which should be perfect for what I want, then later I'll chuck the 3 speed in there for warp speed :) I simply cant wait! Thanks again! Cheers Dre Inline................. > Duh, I think I may have mixed things up. The 17/47 is the ratio of the > spur/pinion not the bevelled crown/pinion gears attached to the diffs :) > <oops> I'm pretty sure all the diffs are the same ratio; at least I haven't seen different diff gearing commercially available. > Anyways, made my day cause now I can use the 4 spider diffs with any ratio > I > want. Since the truck was an SS, it has 15/49 gears in it which should be > perfect for what I want, then later I'll chuck the 3 speed in there for > warp > speed :) I simply cant wait! You and me both. Mine gets up to top speed in a matter of 2-3 seconds and I just <know> there is so much more oomph left in the motor to propel her to insane speeds. I'm kinda tempted to throw the 18T clutch bell (2.72:1) on there and see what she'll do, but I know the bottom end accelleration will suffer and I do most of my driving in dirt and grass so I need the low-end torque. > Thanks again! You're welcome! Doc > Hi all, just curious whether a stocko Savage with a Picco .26 engine > (2.7hp > @ 37000rpm) can pull wheelstands if you punch the throttle from > standstill. Some people do seem to be able to get them, and with 15/49 gearing i would imagine they are quite possible. I ran an SH .28 on 18/49 and that did, with no first gear :) > I'm building up a custom Savage out of the one I just bought (which is > mangled, long story) for $50AUS and I want this thing to be a bit wild. [quoted text clipped - 4 lines] > > Soooo to all those with Savages, well can yours? Do wheelstands that is? Mine wheelies off the mark, most of the time, with K4.6 Hpi .28 engine, 15/49 gearing, and Proline Velocity 6 40 series wheels. Its also quite a lot about rear suspension set up, the stiffer it is, the easier it wheelies. However it should be noted this isn't good for handling or jumping affects, and also wheelies are very bad for your rear diff... I personally can't recommend the K4.6 engine high enough. Its a dream to start (got the Roto on it), tuned very easily and is very, very powerful. Loving it :) Also consider maybe the new Picco .27, as these go quite cheap on Ebay, and are supposedly very good... Of course, if you want INSANE wheelie power, then it has to be a Twinzilla conversion with twin .28's ;) Just don't blame me for your maintenence bills :-D  SignatureDan > > Hi all, just curious whether a stocko Savage with a Picco .26 engine > > (2.7hp [quoted text clipped - 4 lines] > imagine they are quite possible. I ran an SH .28 on 18/49 and that did, > with no first gear :) Well I should be right, cause I've decided on the K46. I plan to start with the 17/49 gearing and go from there. > > I'm building up a custom Savage out of the one I just bought (which is > > mangled, long story) for $50AUS and I want this thing to be a bit wild. [quoted text clipped - 21 lines] > conversion with twin .28's ;) Just don't blame me for your maintenence > bills :-D Well I dont want to stiffen up the suspension all that much, I'd rather the off road ability and have a donk big enough to pull the fronts off the ground on command :) I've also got the 4 spider diffs in there so I reckon the diffs will be able to take the punishment, if not, I'll put the front in the back if it lets go and stick a normal one back in the front... (that is if I cant get another 4 spider complete for $20AUS) Twin engine setup is maybe a little tooooo wild for me right at the minute, I think I'd rather tame this beast first, then if I still cant get enough, I might chuck another engine in there :) yeah but nah! Cheers Dre I considered going with the K4.6 until I found that the rotostart and pullstart are specific to that block. Only a half a horsepower more than the .25 as well..(Don't get me wrong though..there is no substitute for more c.i. and horsepower!) If I trash my .25 however I think I will go with an Ofna .26 (really good prices can be found on them, and they are decent motors) > I personally can't recommend the K4.6 engine high enough. Its a dream to > start (got the Roto on it), tuned very easily and is very, very powerful. > Loving it :) >I considered going with the K4.6 until I found that the rotostart and > pullstart are specific to that block. Only a half a horsepower more than [quoted text clipped - 7 lines] >> start (got the Roto on it), tuned very easily and is very, very powerful. >> Loving it :) The only thing i'd say about the Ofna/Picco/Wasp/FTX .26, is that it can be annoying to tune, and can lose a tune quite easily, in my experience. Whereas i've found the K4.6 a doddle :) SignatureDan |
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