[RSBryan]

Introducing the all new Roadster Shop Fast Track Independent Rear Suspension.

The first performance based IRS designed specifically for pro-touring and performance muscle cars.

Currently available in all Roadster Shop Chassis Systems.
Details:
Light weight aluminum 9" center housing.
The stub axles are available in 31 or 35 spline.
Incorporates a large diameter upper and lower control arm.
Simple on the fly caster/ camber adjustability
C6 Corvette spindles and hubs.
Allows up to 14” disc brakes on the rear of the car.
Rear mounted splined sway bar.
Designed to allow up to a 12” wide rear tire.
Axles and CV built to handle up to 1400 HP

We currently have the IRS in both 64-67 and 68-72 Chevelle (and GTO) chassis as well as 1st and 2nd gen Camaro Chassis, and Challenger/Cuda Chassis. Mustang chassis are next on our drawing board to incorporate the IRS into.

 

[Jasons 69 Chevelle]

Wow looks good!

How much 20 large?

 

[RSBryan]

Thanks Jason
We will have the pricing locked down within the next couple of weeks. It should be in the 8-10 price range for the entire rear set-up.

 

[RSBryan]

More pics of the Fast Track IRS

 

[tommycomfort]

Very nice!

 

[vrooom3440]

Interesting... but looks like a noisy sucker with that solid mounting for the pumpkin. And if there were any give in that mounting I would expect it to hop like a bunny.

Look at Corvette IRS design: rubber mounting for NVH but on a very wide spacing to reduce oscillation amplitude. Helps control wheel hop that way.

 

[93Polo]

Love the setup, after owning Corvettes and friends with Vipers, I wish an IRS setup were in my budget.

The C4 and C5 guys are always trying mount the diff. more solidy. RX7s are also solid mounting Ford 8.8" diffs with good results.

 

[RSBryan]

Steve,

Thank you for the comment...that actually brings up a great point about the design..

You see...We have increased camber gains in roll compared to stock C6. There is 1 degree of negative camber gain through 1" of compression. This makes sure your tires never gain positive camber (like a stock C6) during cornering, losing traction/grip.

Upper and lower control arm mounting points are pitched to give your vehicle 55% anti-squat, NO OTHER IRS OFFERS THIS, (Anti-squat will make your tires plant harder to the ground to help with acceleration and traction out of corners and from a launch)Preventing the rear end from hopping around...
We were also able to stand up the coilovers drastically over what is possible on a stock C6 arm giving more desirable a motion ratio. the suspension will move..not the center section.
Our upper control arms are also easily adjustable so caster/camber can be adjusted with shims while at the track.

 

[RSBryan]

also...The top and the bottom of the 9" housing are outfitted with Delrin bushings for zero deflection and quiet opperation.

 

[vrooom3440]

The combination of delrin and a seperate frame might just keep the NVH down to reasonable levels.

 

[dukess396]

Free advertising.

 

[mikesanto70]

$8-$10,000, thats a friggin BARGIN for a custom frame with front and rear suspension bolted to it already, sign me up right now, hell ride - tech wants $8000 alone for their crappy suspension system, give me this anyday for the extra 2k are you kidding!!!

 

[93Polo]

The base price for the frame is ~$15k, the IRS is a $8-10k option.

 

[1965_ss]

Yeah, more like $30K when all done with the frame..................probably more.
Then you have to do fuel tank, wheel tubs, front inner fenders, rims/tires.......

Wish I had it though!

 

[all4sho]

sure does look nice.............tho