Rear suspension/tire pressure q.

[Formulaboy95]

I am trying to get the full potential out of my car at the track, and it seems like the 60' is really important. Trying to get the right combo for the suspension and tires to grab off the line and not get squirrly when it shifts 1-2. It is usually one or the other.

Rear Suspension wise, I have:
Random Technology adjustable torque arm
BMR adjustable lower control arms
BMR panhard rod
BMR rear sway
HAL QA1 adjustable 12-way shocks

Rear tires are Nitto NT555R

Here is the thing, first pass I ever made with the nitto's and some of the above, I got a 2.004 60'. Tires were hot, and were at like 42 psi. After that I lowered the pressure to 18psi, and ran a 2.304 60'. Last run, I aired them back up to 32, and got a 2.12 60'.

Last Sunday, I came close to that with a 2.055 60' with the tires at 32 psi, 31 psi I got a 2.12.

Seems like the higher the pressure, the better the 60'
People there said they run the nittos at like 14 psi.
I am open to suggestions as what to do.

[Joe 1320]

I might suggest lower control arm relocation brackets. They lower the rear mounting point to change the instant center. This eliminates the tendency for the rear end to squat. The leverage is changed to permit the axle rotation to plant the rear harder by trying to lift the chassis instead of squatting. These are of major importance if the car is lowered, but the benefit to drag strip type performance is noteworthy to regular ride height cars.