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Loosing rear end off power?

Loosing rear end off power?

Old 06-03-2007, 06:04 AM
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Default Loosing rear end off power?

I am pretty new to the onroad scene. I bought a barely used T2 from a friend. I have gotten my car set-up pretty decent, but the rear end keeps sliding out in corners if i get off power. On power, I have great traction and handling. Any ideas on what I can do to help stop the sliding? Running on a parking lot track, that they spray before racing starts. I think I am loosing a ton of time through corners when I have to get off the gas and the rear slides.
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Old 06-03-2007, 07:15 AM
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Did you get the manual and setup guide with the car? If so the setup guide is really good for helping with getting your car to handle the way it should. In general softer rear springs, stiffer front springs, stiffer front sway bars may help a loose condition.

Rod
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Old 06-03-2007, 07:32 AM
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you may have too much rear droop
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Old 06-03-2007, 07:46 AM
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Trying one or all of these will help,

#1 check to make sure you don't have any toe out.

#2 add front kick up.

#3 Remove some bump steer.

#4 put heavier shock oil in the front.

These will not alter, or alter very little, your cars handeling at other times than turn in, but they are also not very powerful tuning options (if your car snap oversteers badly, you might not be able to completely fix it with them).

Lastly, try adding some front caster, this can reduce initial steering, but it will also give you additional exit steering as well, so it might not be the ideal fix.

If these don't fix the problem (I might have missed something), then you need to give up. When you start changing springs, you are going back to square one (well, maybe square 2 ). If you change the springs or add sway bars, it will solve the problem of snap oversteer, but you will have to alter everything else to get the handeling back for everything but trailing throttle conditions.
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Old 06-03-2007, 08:22 AM
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Originally Posted by TimV
I am pretty new to the onroad scene. I bought a barely used T2 from a friend. I have gotten my car set-up pretty decent, but the rear end keeps sliding out in corners if i get off power. On power, I have great traction and handling. Any ideas on what I can do to help stop the sliding? Running on a parking lot track, that they spray before racing starts. I think I am loosing a ton of time through corners when I have to get off the gas and the rear slides.
Check your rear toe in. Too little will cause what you describe. For racing on asphalt you need 2.5 to 3 deg rear toe on each wheel.
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Old 06-03-2007, 08:24 AM
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Default traction to the rear

Originally Posted by TimV
I am pretty new to the onroad scene. I bought a barely used T2 from a friend. I have gotten my car set-up pretty decent, but the rear end keeps sliding out in corners if i get off power. On power, I have great traction and handling. Any ideas on what I can do to help stop the sliding? Running on a parking lot track, that they spray before racing starts. I think I am loosing a ton of time through corners when I have to get off the gas and the rear slides.
You can add rear tow, lighten the rear shock spring, go lighter in the rear shock oil, lean your rear shocks in a hole, or add more droop. These tuning options will all help in getting more traction for your rear end. You can also go to the Xray set-up site:

http://forum.teamxray.com/xsheets.php
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Old 06-03-2007, 09:14 AM
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is anything binding? too much drag brake? how bad is the rear end getting out, does it loop on you?
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Old 06-03-2007, 09:26 AM
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Default Weight transfer!!

Originally Posted by tallyrc
is anything binding? too much drag brake? how bad is the rear end getting out, does it loop on you?
Bottom line is too much weight is transfering to the front of the car when your coming off throttle. So, all the suggestions above is correct so weight transfer to the front is lessened.
Just my 2$
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Old 06-03-2007, 10:57 AM
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Originally Posted by TimV
I bought a barely used T2 from a friend.
As soon as I read the thread title I knew it would be a T2
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Old 06-03-2007, 12:58 PM
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Since its a used car... Do you check to make sure all 4 tires are of the same compound ? and that if there are 2 compounds the harder set is in the front? ITs not un common for guys to run a harder front tire. IF you bought the car used its an easy mistake for the seller to slap on some used tires and possibly miss installing 4 the same or harder compound up front.

You running a oneway im assuming too? My T2r was like that on carpet. It came down to droop and more rear toe. Also like running the chassis stiffer too
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Old 06-03-2007, 04:18 PM
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All 4 tires are the same, running regular adjustable diffs. I will try adding more rear toe, and removing some droop from the rear. Come to think about it, I think the rear toe is somewhere around 1* max.
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Old 06-03-2007, 04:31 PM
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Originally Posted by maxepower
Bottom line is too much weight is transfering to the front of the car when your coming off throttle. So, all the suggestions above is correct so weight transfer to the front is lessened.
Just my 2$
Weight transfer!!!!! That says it all. How to cure it...work with front springs(stiffer) may want a bit heavier oil too, reduce rear droop, adjust rear toe and make sure your car is not tweaked!

Those are the immediate recommendations.
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Old 06-03-2007, 04:33 PM
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Originally Posted by TimV
I am pretty new to the onroad scene. I bought a barely used T2 from a friend. I have gotten my car set-up pretty decent, but the rear end keeps sliding out in corners if i get off power. On power, I have great traction and handling. Any ideas on what I can do to help stop the sliding? Running on a parking lot track, that they spray before racing starts. I think I am loosing a ton of time through corners when I have to get off the gas and the rear slides.
Definitely check to see if anything at all is binding first and if not that I would also check the drag brake.
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Old 06-03-2007, 04:36 PM
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It sounds like a on-way is up front. I'm not a expert but the rear end does get loose when off-power when using a one-way up front. You can switch it to a spool or ball diff in a few minutes.
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Old 06-03-2007, 04:36 PM
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It sounds like a on-way is up front. I'm not a expert but the rear end does get loose when off-power when using a one-way up front. You can switch it to a spool or ball diff in a few minutes.
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