Been giving it a a couple months "testing" before I posted my impressions of Bruce's IRS bushing kit. All I can say is the kit has to be one of the best mods I have done to the car besides the whipple.
Prior to the bushing kit, I had a very squirly feeling to the car, say on a 3rd gear roll full boost 20-22 psi, the whole rearend felt like it was moving around in the cradle....never did like that feeling. I knew when this happened, it had to be the amount of rubber in the IRS. Secondly, I did struggle with wheel hop on occasion...not anymore.
My car has MM coilovers (Fnt 375 / Rear 575 springs) with MM sport bilsteins and handles like it's on rails with Bruce's kit. No change in NVH. Plants the 630 rwhp perfecly AND predictably unlike before. You can feel the articulation of the suspension is greatly enhanced. Cornering is a thing of beauty. Zero noise.
I only did the delrin/UHMW and aluminum bsuhings. Kept the stock sway bar end links and stock tie rods.
Overall just wanted to give an honest opinion after a few months of driving the beast. Special thanks to Bruce and all of his outstanding advice / customer service.
Lastly Bruce....I still need to return the rented tools, sorry for the delay! I will do quickly, just has skipped my mind due to a hectic schedule.
Pics: Notice the gloss back powdercoat on the subframe!
____________________________________
Gen 2 (2.3) Whipple @ 21 psi and 23 degrees timing tuned on E85 @ 8.5:1 compression.
SAE 705 rwhp / 655 rwtq
STD 720 rwhp / 668 rwtq
New 10:1 Aluminator numbers TBD!!
actually before i found my powdercoater, i had cleaned, prepped, primed, and painted my upper controls arms in black gloss engine enamel and lower control arms in silver engine enamel. After 3 non stop days of damn prep work, i found an awesome local powdercoater that did my subframe. I only wish i had found them prior to doing all that work on the UCAs/LCAs.
Last edited by skaarew04SVT; 07-30-2009 at 11:59 AM.
as said before.....the uppers and lowers not powdercoated. here is a pic of some of the priming process prior to spraying 3 coats of engine enamel. the LCA on left is primed, the one on right is just cleaned and stripped (wirewheel on drill used) a bit.
Last edited by skaarew04SVT; 07-30-2009 at 12:05 PM.
There will be signs in the sun, moon and stars. On the earth, nations will be in anguish and perplexity at the roaring and tossing of the sea. Men will faint from terror, apprehensive of what is coming on the world, for the heavenly bodies will be shaken
anyone know if there are lighter rear contraol arms for our cars? not realy sure if they are that heavy, was just wonderin'
I don't believe their are controls arms by themselves. Kenny Brown sells a kit to replace the bushinged stock subframe for a hardmount unit and comes with new control arms with "improved geometry". But honestly, the claimed weight savings and geometric changes aren't worth the expense or the changeover especially when you read through Bruce's experiences with the unit. This IRS is awesome, and this bushing kit is what reveals its true potential. Everyone claims the Cobra IRS is SO heavy and says it sucks...The new Camaro's IRS weighs 390-lbs. Noooo spank you.
Great review and pics OP!
____________________________________
I believe in the Lord Jesus Christ and the Cobra IRS - Trent
Been giving it a a couple months "testing" before I posted my impressions of Bruce's IRS bushing kit. All I can say is the kit has to be one of the best mods I have done to the car besides the whipple.
Prior to the bushing kit, I had a very squirly feeling to the car, say on a 3rd gear roll full boost 20-22 psi, the whole rearend felt like it was moving around in the cradle....never did like that feeling. I knew when this happened, it had to be the amount of rubber in the IRS. Secondly, I did struggle with wheel hop on occasion...not anymore.
My car has MM coilovers (Fnt 375 / Rear 575 springs) with MM sport bilsteins and handles like it's on rails with Bruce's kit. No change in NVH. Plants the 630 rwhp perfecly AND predictably unlike before. You can feel the articulation of the suspension is greatly enhanced. Cornering is a thing of beauty. Zero noise.
I only did the delrin/UHMW and aluminum bsuhings. Kept the stock sway bar end links and stock tie rods.
Overall just wanted to give an honest opinion after a few months of driving the beast. Special thanks to Bruce and all of his outstanding advice / customer service.
Lastly Bruce....I still need to return the rented tools, sorry for the delay! I will do quickly, just has skipped my mind due to a hectic schedule.
Erik:
Thank you for the glowing review and the awesome pics! It reminds of the first time I drove my new modified IRS at Mid-Ohio back in 2004! I was giddy about the way the car handled!
There are few things I enjoy more than reading all of the success stories from these bushing kits! I never get tired of hearing it! And my favorite line; "BEST MOD BESIDES THE WHIPPLE"
No worry on the return of the removal tools. There is no time limit yet! That day may come though!
Quote:
Originally Posted by HillarysNuts
Any particular reason why you only did those? How much did just that cost?
Those parts are actually the "Complete IRS Bushing Kit" that we offer. All of the other items are optional items and are not completely necessary. They are more like icing on the cake if you will.
Rock on modified IRS Brothers and go spank some Corvettes for me!
____________________________________ Bruce
Got Wheel Hop?
Getting passed on the track by Corvettes?
Unhappy with your IRS?
FIX IT!!
Damn I forgot to send his tools back also. It has been a few months now. I even boxed them back up and emailed him for his info.
This kit was not to bad to install and has no nvh increase that I can notice.
I don't believe their are controls arms by themselves. Kenny Brown sells a kit to replace the bushinged stock subframe for a hardmount unit and comes with new control arms with "improved geometry". But honestly, the claimed weight savings and geometric changes aren't worth the expense or the changeover especially when you read through Bruce's experiences with the unit. This IRS is awesome, and this bushing kit is what reveals its true potential. Everyone claims the Cobra IRS is SO heavy and says it sucks...The new Camaro's IRS weighs 390-lbs. Noooo spank you.
Great review and pics OP!
10-4,., thanks for the info and sorry about the highjack.,.,
driver mod needed 
It reminds of the first time I drove my new modified IRS at Mid-Ohio back in 2004! I was giddy about the way the car handled! 
And my favorite line; "BEST MOD BESIDES THE WHIPPLE" 
That day may come though! 
Linear Mode
