My new video dropping 6am eastern covers installing PENSKE 8300 rear coilovers
ALSO applies to ANY coil-over kit budget to hardcore
these are double adjustable (low speed Bump/compression) and have remote canisters.
these may seem overkill for a Turd gen, BUT will interest those why are chasing that 0.01 second when Autocross and road racing
these are a Custom valved set from Unbalanced Engineering specifically for autocross.
video covers the install and mounts

obviously the 8300 have a HUGE increase in rear grip compared to Koni Yellow and weight jacks
overall weight savings is about 20lbs, almost 100% unsung
I'm running these with 7in long 400Lb 2.25in coilover spring
I've killed 2 Sets of rear Koni yellows, so these will be a much needed upgrade
the increase in rear grip is insane, i can dip int the throttle so early and the axle doesn't get upset over any bump.
and my home Autocross courses are VERY bumpy.
funny enough, the rear grips so well, i can even have a bit of understeer just because the rear is gripping so well.
and better yet, they ride nicer than the Koni yellows
these 8300 have about 30% more compression force than the Koni yellow rear shocks, and about the same rebound

PENSKE 8300 Double adjustable with remote res

upper Founders coilover mount

installed at full droop

custom 316 stainless rod end spacers machined by a friend

mount allows access to the compression sweep

maxed out on bump stops, still has travel left

remote canister mounted to the pan-hard Support bar.

routing the remote res lines away from the axle

3d printed lower mount prototypes

the Founder's lower mount (left) didn't work, so i designed my own (right)

Shock bag t protect the coilover shaft and seals. 100% necessary as rocks and dirt will damage the seals

re-routed PTFE stainless braided brake line

 

Thanks for sharing. I like these videos you make. They're short, get to the point, and educational.

 

The video shows you have the car very dialed in at this point looks like your ready for more hp.

 

Very sexy - Who makes the spring?

 

Those are 7in long 2.25in Landrum springs, but after taking to some experienced racers: I should have gotten the Hyperco springs
the Hyperco springs are a bit more linear across their travel range.

 

Yes, I was a bit surprised not to see them on those Penske's.

 

I've used the landrum Springs before. They come with spring Dyno plots, so they're not low end springs by any means; but probably not quite as good as the Hyperco.