Suspension and Chassis Questions about your suspension? Need chassis advice?

IROC'S DON'T HAVE A HARSH RIDE?

Old 07-18-2001, 07:58 PM
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Car: 89 iroc,2012 eco 150,roadglide
Engine: zz4
Transmission: t56
IROC'S DON'T HAVE A HARSH RIDE?

O.K. so I get my car back from the alighnment shop and the guy tells me "this has to be the harshest riding camaro they ever had there. Here's my combo:
1.base model v8 coils (thanks you pull it)
2. Monroe sensa tracks (you pull it again)

switched from the following:
1. 89 Iroc coils
2. Koni yellows

I thought it still rode stiff myself, but I have no more ideas on how to soften things up w/out losing handling.

Hmmmmmnn,
I know , I have one of those rare one of ten models set for really big *** people with some weight.


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89 iroc,zz4/700r4/3:70 gears/koni yellows/herb adams bars/and alot of other crap to make it work!
Old 07-19-2001, 12:25 PM
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Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
Sounds like you should have softened quite a bit from what you had. Only thing I can offer is lower the air pressure a couple of pounds will help or change from Z rated tires. Low profile tires (especially Z rated) like on IROCS naturally ride harder than standard tires.

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91 Camaro RS 5.0L Black Convertible 700R4
** Added so far **
*GM Wonderbar,Alston SFC's,spohn LCA's and Panhard rod
*Turbo City Inj Spacer
*Dual Snorkel Air Filter
*March Performance Pulleys
*GM 3.42 Gears with OEM Zexel POSI
*Edelbrock headers
*3" High Flow Cat
*3" Dynomax Exhaust
*Walbro 255 lph Fuel Pump
***Future 330hp Vortec Crate with LT4 hotcam and 454 TBI
Old 07-19-2001, 02:44 PM
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Car: 90 IROC
Engine: 406
Transmission: GMPP 93/4L60
Axle/Gears: 9 bolt 3.27
What are the spring codes? Try and find a set of NNN rear springs from an IROC or 1LE car. They offer a much better ride over the NNLs. My 90 Came with them stock, it has a much better ride than my 91 RS did with the NNLs. And they handle great After the RS was totaled i swaped the NNNs for NNLs the car didnt ride as good. The NNNs are a progressive spring,Looking at the two side by side the top 3 coils are tightly wound on the NNNs were the NNLs arent.

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!
Old 07-19-2001, 06:20 PM
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Car: 4
Engine: 6
Transmission: 5
Any kind of factory springs more than 3 or 4 years old aren't even vaguely like they were when new. I wouldn't waste the time on any of them, no matter what the option codes are.

Try some new springs, I'd suggest Moog if you want a stockish sort of height and ride; and new shocks / struts. None of that is going to be any good used, ever.

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"So many Mustangs, so little time..."
ICON Motorsports
Old 07-20-2001, 04:31 AM
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You might want to see if something in the suspension is binding. I know someone who got his car and the previous owner had installed the rear swaybar upside down and it rode like a skateboard until he figured out why by comparing to another vehicle.
Old 07-20-2001, 08:46 PM
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Car: 90 IROC
Engine: 406
Transmission: GMPP 93/4L60
Axle/Gears: 9 bolt 3.27
New shocks/struts made a big improvement in the ride of my car. Yeah.. I will have too give the dealer a call sometime and see if they have any NOS NNNs. I really like the combination of ride and handling they offer. Be nice to see how they compare new to old.

I tried those moog rear springs... I had to cut a coil and a half off the top to get the *** end down to were i liked it. The car handled better with them. The outside rear spring didnt drop as much in a turn and it was more stable at the limit. I ended up puttin the NNNs back in the trade off in ride quality wasnt worth it to me on my everyday driver. On a track though they would have been an improvement.

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!
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