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Ok, what's the point of..

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H

hugo

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Ok, what's the point of these: (TMaxx 2.5)
1. Forward Only Conversion
2. Single Speed Conversion

Is reverse used that much in bashing?
Why would the single speed conversion for the tranny be beneficial?
Olds97, you're probably sick of me already so ignore my post to save your sanity!:loser:
 
The keys are 2-fold. First, understand that to use reverse, there is a separate set of gears in the tranny that reverse the output rotation. Hence reverse. Secondly, when the tranny is stock, there's a second clutch in the tranny that has to engage to get it rolling. You can see this action when the truck is new by the fact that the truck tends to jerk around at low speeds. But putting in the forward-only-conversion (FOC) you (1) remove an extra set of reverse gears. That removes rotating mass in the tranny. Lighter drivetrain=better acceleration. And (2) you remove that clutch which gives you a much more positive hit when you hit the throttle. Faster acceleration and smoother power. If you don't think you'll miss having reverse, a forward-only-conversion makes quite a difference.
as for single-speed, well that may help on the track, but probably doesn't make a huge difference if you're bashing.
 
reverse is nice for bashing you might find yourself using it instead of having to walk over to rescue it lazy man's truck lol and single speed well its a matter of preference really, how fast do you wanna go? lol
 
Thanks Candyman and Sly. Does the single speed make it faster? Do you notice a difference in the bottom end or the top end? Thanks boys!
 
no its no faster though just not as fast on top speed. I personally have two tmaxx's with 2 speeds and one has forward only and the other has reverse still the one with forward only has a big block conversion .26 engine and the other o.s. .18 and in a drag race it depends who hits the throttle first i don't think rotational mass has much to do with it. but when you take it apart to work on it the forward only is much easier as the is not much in there lol
 
Think I'll go with the forward only conversion but not the single speed conversion. If I find it would be more beneficial with the reverse, I'll pop it back in. I'm going to go with a pullstart I think. I'll have to think about that one. Everyone seems to have trouble with them, that's my only concern. I must say, I love the idea of tearing something apart on the thing. I think it'll be fun!:dance:
 
Don't break a nail ;) (just messing with you!)

I like reverse on my revo, but I hated it on my t-maxx. Having it in there on the maxx made it all jerky and slow to respond like CandyMan said. It also made a weak spot in the driveline. That jerking on take off slams the gears in the trans and slams the gears in the diff every time you hit the gas. Over time, it just causes more problems than it was worth.

The revo has a different setup, so it's smooth on the take off. But if/when my little servo dies or a I shred a gear, reverse will be gone. I don't use it often enough to warrent fixing it.
 
sly2136 said:
no its no faster though just not as fast on top speed. I personally have two tmaxx's with 2 speeds and one has forward only and the other has reverse still the one with forward only has a big block conversion .26 engine and the other o.s. .18 and in a drag race it depends who hits the throttle first i don't think rotational mass has much to do with it. but when you take it apart to work on it the forward only is much easier as the is not much in there lol
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Oh I have to disagree w/ this one...rotational mass has everything to do w/ it.....w/ reverse module in there is basically 3 clutches inline before your axles even think they can move.....CB/Flywheel clutch.....slipper clutch at the spur gear.....and the forward/reverse gear clutches.....the more things you have inline that slip the less direct your drive is.......then there is the whole barrel and extra clutch, from for or rev, whichever is not being used...is still flying around at a few thousand RPMs......it will affect the acceleration adn sustained RPM charachteristics of the tranny.....that's a lot of relative weight to be slinging around w/ no purpose (at times)....this was the whole reason I was making my truggy after running a buggy for the first time I pretty much realized......the advantage of the center diff , simplified drivetrains....I mean I had seen them in teh shop but until I went to the track I just never imagined how different it would be for racing purposes.......
 
FOC has it's advantages, but more so in the T than the Revo. First week my wife had her T she shredded a couple of gears. Traxxas kindly sent me the replacements and a couple others that looked shady. Hasn't eaten anymore, but now she knows to not touch reverse until it sit still. She hates how the clutch engages, but she insists on reverse, so she gets to suffer with it.

As far as one speed, there is no real loss I can notice or think of not to have multiple speed tranny's. HPI is now up to a three speed, so I guess the industry is not getting any backlash either.
 
Plaidfish said:
Oh I have to disagree w/ this one...rotational mass has everything to do w/ it.....w/ reverse module in there is basically 3 clutches inline before your axles even think they can move.....CB/Flywheel clutch.....slipper clutch at the spur gear.....and the forward/reverse gear clutches.....the more things you have inline that slip the less direct your drive is.......then there is the whole barrel and extra clutch, from for or rev, whichever is not being used...is still flying around at a few thousand RPMs......it will affect the acceleration adn sustained RPM charachteristics of the tranny.....that's a lot of relative weight to be slinging around w/ no purpose (at times)....this was the whole reason I was making my truggy after running a buggy for the first time I pretty much realized......the advantage of the center diff , simplified drivetrains....I mean I had seen them in teh shop but until I went to the track I just never imagined how different it would be for racing purposes.......
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hey i'm just telling you how mine are you can feel free to disagree but my race truck is dominate and its the one with reverse so i don't know what else to say every one i race has forward only i honestly don't see a speed difference or acceleration difference. yes i agree with you guy that its a little jerky if you trying to take of really slow but who really does that anyway mine don't jerk because i don't drive it easy. the other thing i noticed with the forward only is when you let off the throttle to slow down from a high coming into a corner lets say it seems to act like an engine brake stays engaged where as the other one rolls more free it totally disengages when you let off any body else notice that
 
Ok, let's get it on!! :boxing: I love it when you guys disagree. It's fun to read your responses to each other. Also, and this is a minor point, I get to learn.lol
It's interesting to hear disagreements because it's makes me understand things I wouldn't have thought of.:argue:
See, I almost missed something here. What did Plaidfish mean by a center diff? What center diff? Was he just generalizing, meaning it applied to another vehicle?
 
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I'd love to see a bunch of guys rolling around in the dirt! Oh...you meant settling it on the track!!
LOL.
You know, I think I saw what looks like the FOC part in a baggy I got with the TMaxx. I should check that out. It may already have been done or maybe it's a new part?? I would assume that there are no part #'s on the parts?? So, I'll just compare what it to the instructions on Fast Eddy's site. Hmmmm....
 
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the other thing i noticed with the forward only is when you let off the throttle to slow down from a high coming into a corner lets say it seems to act like an engine brake stays engaged where as the other one rolls more free it totally disengages when you let off any body else notice that
Click to expand...

No, but I'll watch for it next time I run either a Maxx or stock Revo. I can compare it to my Revo.

Hugo, no arguments, but good point that disagreements bring out new points, sometimes.
 
sly2136 said:
lol fun is when they argue at the track and we go settle it lol in the dirt lol
Click to expand...

YEP!!!!!
I wasn't trying to bash your truck Sly...I've seen guys have reverse in still and do very well.....and they are running stock mills to boot.....but they weren't running against me :D....I'm not saying I'm the hot poop at my track...in no way can I be considered a top dog as far as th racing goes....but I have my moments in the race.......I'll throw the heat to hack someone if they ticked me off...LOL...hey drive clean and I will too.....
anyway I was just talking about the rotating mass not being an issue....you may be driving your truck at top level now but remove the reverse module and you'll definatley SEE an improvement....
Hugo,
The center diff is another type of transmission.....typically used in buggies, but now more trucks are using it and thus the "truggy" was born.......basically it allows different RPMs to go to the front and rear differentials.....so instead of the power being applied to both equally it only allows power to the wheels that slip (just like th efront and rear diffs allow left to right differential RPMs)....gives the vehicle better handling characteristics and keeps all 4 wheels planted solid most of the time.....
 

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