I've never heard anything about about different A-arms, but the 1LE cars did indeed receive better bushings. So, GM did/does produce more durable performance bushings.

I won't try to convice you the Z28 got better sway bar endlinks, but the WS6 Trans Ams definitely did. My car, from the factory, had urethane bushings on the sway bar endlinks. In fact, I just pulled my rear sway bar last night and the original 15 year old bushings are still in pretty good shape.

 

Those interested in the best handling for their third gens. should check the web for track days offered for both Hotchkis and Global West Customers. I know that the Global West people offer tech support on these track days and can really get you dialed in. It is best to have the knowledge to optimize your suspension, especially if it is adjustable. Steve Spohn might have track days also. I would check. He is the king of customer support and I would not be surprised if he offers this to his customers.

I watched the Atlanta Runoffs last year and of the top three finishers in C sedan, two were third gen.s (1st and 3rd), one was a 4th gen. (second) and best of all....no Mustangs finished on the podium. Gettie Up Lil' Ponies, Gettie Up!

 

i have that article i always use it to back up how good our cars handle. i got the hotchkis springs my rear end looks centered fine.Thats car had the 36mm front bar they just replaced the rear with a 1" bar .

 

My 91z has a wonder bar stock...

 

BretD 88GTA, i belive my sway bars did also come with poly bushings... my dad has owned the car since new, and i asked if he ever got the front or rear rebuilt with poly busings.. he said never... the bushings are 16 yrs old, there still red and look brand new... saved me some money when i threw on the 36/24mm sway bars...

 

When I rebuilt my front suspension on my IROC I bought some parts from the dealership...any part that came with a bushing came with a poly bushing.

 

now if i wanted to could i go to a gm dealer and get actual iroc springs not just a generic spring kit?

 

The 32mm bars on thirdgens were solid.

The 34mm and 36mm bars were hollow. I've had one of each in hand all at the same time. The weight difference says the 34 is hollow. On a friends 1991 low option 5.0L/M5 Z28, it had a 34mm bar. On his high option 5.7/A4 Z28 it had the 36mm bar.

 

i thought that the factory polly bushings were white/cream colored, but then again i have been at work for 6 hours now and my brain is not functioning at 100%

 

Very true.


Poly bushings are a joke. More like poly torsion springs with how they bind. Del-a-Lums own poly a-arm bushings.

GM DID put different bushings in a-arms. A 1LE is one example but not the only example. I've already seen, wrenched on, poked and prodded a-arm and body mount bushings (non thirdgen) with harder rubber than other ones when a single durometer of rubber would have done.



I can give examples of end link bushings that are different material (poly or plastic) vs. their rubber counterpart in non performance apps. Look at a 79-81 WS6 front bar. Wouldn't that have taken extra $?

 

I know the reddish ones were used in the 80s and I know I've seen the offwhite ones on 4th gen f-bodies. HTH.

 

stock IROC suspension is good for over a G of cornering with Hoosier Road Race tires. I've never driven a ferrari, but I'm sure many of you iroc people running good performance tires have made hard turns at 50+ MPH with all the stability of a train on rails. I was never for the road race scene but I see a lot of 3rd gens tearing that arena up, more so than the drags actually. LS1s don't have **** on 3rd gens in the twisties...

 

Somebody call for me

 

i like that plate dean

i'm thinking about getting 'ON RALZ' for mine (only 6char+a space in Oregon) thats if i dont' get 'BLWN RS' (need a blower for that one though )

btw, when is the $500 challange going to happen i'd like to drive down there and watch that, maybe if you loan me your tires, i'd run too

 

Thank you sir.

I tried for OnRails and several variations of it, but So.Cal is the hotrod capital and hard to get good plates anymore.

$500 Challange- never got a taker and Mods got on my butt for rousting the guy alittle- oh well- I had my fun.

I am actually going out to the garare right now to tear down the car and go through it- New hiems everywhere, gotta pull the tranny- Front pump seal showing moisture only after 8 months (bad seal- **** happens)- going to pop in an ACPT carbon shaft also (something I have want to change awhile back but never got to then. Pulling tranny so I figure nows a good time (I hate working on cars if I don't have to -I'm getting old).

Have a good day

 

I recently just raced my IROC in an Auto-X for the first time. It was a little bit of a larger course...I didn't drop below second and was in third at one point really breifly. My suspension is completely stock, and with my engine mods I only run a mid 15 or so in the 1/4(%^@&ING LG4)...but I was extremely competitive, beating a WRX STI, Mid 90s Steeda Mustang, a couple Porche 944 Turbos and quite a few other quick cars.

SO many people under estimate the IROC's handling till they get a ride. I let a kid who owns a late model Nissan 240SX with quite a few suspension mods and who has been auto-xing for a while ride shotty with me around the course and he said," "Holy $hit! I have a whole new respect for this car...this thing stays so flat! It has no body roll what-so-ever!"

I get that response pretty much every time I give someone a ride...they expect it just to pull hard in a straight line and blow in the corners, but it's just the opposite...