Setting up for drag racing
 

What is the best bang for your buck on rear suspension to help me hook up at the track and street? Currently on BMR 1.25 drop Springs toe links trailing arms and upper control arm bushings.
I know I need my car to squat but I need it to stay there and not bounce back up.

:pop2:

I have the BMR trailing arms and springs and it helped a lot with the wheel hop. I may not be running as much power as you though.

From what I hear is removing the front sway bar. Drag radials and trailing arms with bushings along with toe rods. Lower psi on tires

coilovers set to high compression, low rebound up front and set to low compression high rebound in the rear.
that set up allows the front to extend easily and delays its return, while allowing the rear to squat and delaying its rebound.

not sure what else you could do for a bang/buck as you've got the rest pretty much done.
cradle bushings?

I worked with Jordan from JDP on spring rates for the Ridtech coilovers for Pumpkin and he says you don't want IRS to squat, but your right about the front settings for the weight transfer on the launch.

:thumb:

So what should I do? I have the DSS axle and driveshaft upgrades. Running hoosier 295 40 18s.

So I don't want the ass to squat but I want the front to lift?

Correct. The angle of the IRS in the 5th gen requires the rear to limit squat, but transferring weight to the rear of the car will help with traction. The further you squat the more severe the axle angle becomes resulting in lost power.

The heavy duty cars like Farks have moved the center section further up in the cradle to allow them to squat more without losing axle angle and power. Unfortunately in the 5th Gen, the only option to do this is to remove the gas tank and put in a fuel cell.

Hendrix Engineering has developed some off-set diff bushings that may help some of the axle angle issues.

Here is a good article on IRS: http://www.nmcadigital.com/2015/01/0...-axle-go-fast/

Get rid of the lowering springs and go back to stock with some trailing arms.
Stock suspension will get some 1.5x 60'

Rear irs drag spec alignment helps

that article states that you do want squat for an IRS. even the Camaro example desired squat.
A little positive camber fixes the alignment issue so the wheels have max contact during the squat, but the axle issue is still there.
I guess it's a compromise of traction and power delivery. Seems like those offset bushings would be great for allowing more squat.

The article also stated weight on the rear is good, even ballast.
Maybe try a couple sandbags in the trunk to see if your times drop?

And the biggest rear sway bar you kind find!

Get rid of lowering springs and buy the Hendrix offset differential bushings. Lowering springs put even more angle on the axles than stock in which you dont want. The offset bushings straighten things out and help a lot.

Correct! Although Pumpkin is lowered I will be raising the ride height for the track with the coilovers, but that being said I can still go 11.70 and 60' @ 1.64 Bolt On's only lowered.:biggrin:

:thumb: