Can someone tell me what to change, I don’t want to download anyone elses, I want the rims I have on my supra atm, just want some tips to keep grip 
To keep the grip on the rear wheels, you can raise the front end bump and rebound.
You can also change the spring settings.
SpotTheKitty has great reference material in his Open source tune thread. Check it out.
Actually you want to soften the front bump and rebound stiffness just sayin
[Source](http://www.rapid-racer.com/suspension-tuning.php#Damping/ Bump and Rebound)
Also, keep in mind that while most serious set-ups in the real world are double adjustable the ones in Forza Horizon 2 are not. We have one rebound setting and one bump setting for both low speed and high speed settings therefore it is a little different than the double-adjustable set-up.
If you are working in a low speed situation and want to use the damping setting to help with understeer then you would move the slider to the left.
If you are working in a high speed situation and want to use the damping setting to help with understeer then you would move the slider to the right.
—> The trick here is to find that perfect setting where you do not have major understeer in low or high speeds.
(In Forza Horizon 2 you can run ridiculously low bump settings to very good effect and without many negative side effects. You can help make the car smooth over uneven surfaces, grip better in off-road settings, and continue to turn rather well -assuming a good all around tune- using super low bump as low as 1.0)
As I said above, you can also change the spring settings. You can also use the alignment or the tire pressure to assist with grip.
There are many things you can do if this will be purely a drag set-up because you don’t have to worry about driving it around much and racing.
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I have a really fast RWD SUPRA, I’m friends with top tuners in the game and right now no one is close to my drag times. I’ll be posting a tune up for the public soon
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lol your twin turbo is nothing lmao jks
to the guy that wants a fast RWD supra they are very back wards in tuning i tune alot of RWD cars and it dont work out for it you just have to play with it and drive how it feels the best i got is 21.783 with my single turbo FF supra
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Nice o be getting it to lol