Quote:
Originally Posted by TRS
Didnt read the entire thread. Here is what I've done with my LS swap, sure with less power/torque, but maybe closer than OEM, should be some where 450ish:
1: As said before, surprise surprise, use a good tire. But please stay of from generalized pressure suggestions. A good pressure is highly depending on the tire's construction and also the size you are using. In my case I found a impressive while cheap tire with very good traction with a 245/35R18 Federal RS-R.
2: Use a coilover with a stifer spring than OEM, but dont even think about lowering much below OEM ride height. Otherwise the geometry of the rear axle will not work properly without some serious changes.
3: Choose the right ratios. OEM like ratios are nonsense for a high powered swap car. I have a 2.66 1st gear combined with a 3.58 ratio in a OEM rear end casting. Since you are running on even higher torque levels the 3.784 1st combined with 3.78 axle pretty much makes your first two gears useless, even with a hyper pro gold level tire.
4: Dont use hard rear stabilizer settings in case you have a adjustable one.
In my case I cannot spin tires in 2nd and up whithout clutch kick when street is warm and dry and tires are on a working temperature. Under good conditions (good asphalt, tire on perfect temp) even 1st is nailed down once you succesfully closed the clutch without creating slip.
For a comparrison: I used Michelin Pilot Super Sport in the same size before the Federal. I had traction issues with this tire also in 2nd easily. When switching to the RS-R's I started over with the same pressure I found to be perfect with the Michelin. I had realy terible traction issues over all gears with that. Then I reviewed the tire ratings and found a way lower Max pressure rating. So I lowered the Set pressure by 25% and had perfect traction and Improved 0-60mph from 5.1s to 4.1s.
Just my 2cent...
|
What pressures have you been happy with on the Federal RS-R's? You said 25% lower than the Michelin but not sure what pressure you started with.
Just had a quick look online. RS-R's not available here in Australia in this size, but the newer RS-RR seems to be available and price looks very reasonable. I would guess whatever pressures you've had luck with on the RS-R's might well be close enough is good enough on the RS-RR's?