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lowering springs

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Old 05-21-2005, 11:57 PM
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Car: 1990 iroc z
Engine: LSX 376 F1A
Transmission: 4l60e
Axle/Gears: 12 bolt 3.42
lowering springs

i need some help on this. Will eibach sportline springs work ok a convertible? Also i just bought 4'inch cat back exhaust so will it even work?


bryan
Old 05-23-2005, 04:05 PM
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Car: '90 RS Vert
Engine: 305 TBI
Transmission: 700-R4
Springs and Exhaust.

The springs will work fine.

The exhaust should work fine also. I am running a 3" Banks catback and I don't recall any fitment problems even with the subframe connectors.

Speedy
Old 05-23-2005, 10:04 PM
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Car: 1990 iroc z
Engine: LSX 376 F1A
Transmission: 4l60e
Axle/Gears: 12 bolt 3.42
do u have any pictures of you car on eibach sportlines
Old 05-24-2005, 12:44 AM
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Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
So far so good. Eibach Pro-Kit in mine for 6 years now.

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Old 05-26-2005, 11:05 AM
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Engine: 305 TPI (LB9)
Transmission: WC T-5
Any particular reason on why you want to go with the sportlines over the pro-kit? When I lived in Santa Barbara (about 10 years ago) I remember many of the streets not being very sportline friendly. The springs in my 'vert right now have roughly the same drop as the pro-kit, and I still have to take it easy on certain streets/dips/speed bumps, etc. The sportlines have even more of a drop. Just my

Have a 'torpedo' at the Italian/Greek deli on State for me!
Old 05-26-2005, 12:54 PM
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Car: 1990 iroc z
Engine: LSX 376 F1A
Transmission: 4l60e
Axle/Gears: 12 bolt 3.42
drop-top IROC Any particular reason on why you want to go with the sportlines over the pro-kit? When I lived in Santa Barbara (about 10 years ago) I remember many of the streets not being very sportline friendly. The springs in my 'vert right now have roughly the same drop as the pro-kit, and I still have to take it easy on certain streets/dips/speed bumps, etc. The sportlines have even more of a drop. Just my

yeah i am going to go with the pro kit. I talked to the tech at ebiach and he said that it would drop the car 2 inches. do you guys know where the cheapiest place to buy them? i appreciate the help too.
Old 05-26-2005, 01:45 PM
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Engine: 305 TPI (LB9)
Transmission: WC T-5
There is a place here in Los Angeles that used to sell them on ebay for a very reasonable price, but once you factored in shipping, it became only a reasonable price. Do an ebay search for eibach and see what turns up- I'm guessing most places retail these for around $220-240.

Also, try ASI in El Cajon, CA. They are on the web at: www.shox.com

As far as shops local to you, I'm not sure what is up that way nowadays. There used to be a place on East Haley St. called Swift Auto Parts that specialized in VW and Euro parts, but I'm not sure if it is still there. If it is, Teddy (owner) can pretty much order anything and is a helluva nice guy (unless you question his knowledge!) . He could recite part numbers off the top of his head for practically any VW made like he was reading straight out of the book!
Old 05-31-2005, 04:21 PM
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Car: '89 Iroc Vert
Engine: 355 TPI
Transmission: T-5(for now)
Axle/Gears: 3.45 9 Bolt
I got sportlines in my vert
Attached Thumbnails lowering springs-iroc1.jpg  
Old 06-02-2005, 11:42 AM
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Car: 1990 iroc z
Engine: LSX 376 F1A
Transmission: 4l60e
Axle/Gears: 12 bolt 3.42
how is the ride quality on those spirngs, also do use this car as a daily driver. do you scrape much?
Old 06-02-2005, 10:56 PM
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Car: '89 Iroc Vert
Engine: 355 TPI
Transmission: T-5(for now)
Axle/Gears: 3.45 9 Bolt
I drive the car daily, but mostly highway

the ride is awsome as long as the road is as smooth as glass

any little bump might as well not have springs,
I shaved the bumpstops down about a 1/2 inch and retapered them

that improved the ride alot, before I had maybe 1/2 inch of travel til i hit the stop, now about an inch and only hit the stops on big bumps

If I have 2 people in the back seat it rides on the bumpstops
but I got a system in the trunk that weighs a far bit

i considered shaving the stops more but got scared the shocks would bottom out and start pounding on the body

its not bad for scraping as long as I'm careful, steep parking lot entrances and speed bumps can be killer just got to go real slow



Plus side of things it handles unbelivably compared to stock
and its has the sweetest stance make the car one of the sexiest things on wheel


long story short is it worth it, yes, only one thing I'd change

I want it another inch lower
Old 06-19-2005, 12:05 AM
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Car: 89 IROC Convertible
Engine: 305 TPI
Transmission: Auto
I bought a set of pro's for an 88RS convertible but sold the car before I installed them. My neighbor bought the car and put them on along with adaptors to mount C5 vette wheels. It looked awesome. The question I have is even though it is an improvement over the stock suspension how much lower or stiffer is it over the IROC suspension-is it worth the money?
Old 06-19-2005, 12:08 AM
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Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks
This is all done for the look, right? The whole "slammed" thing?
Old 06-19-2005, 11:52 PM
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Car: '89 Iroc Vert
Engine: 355 TPI
Transmission: T-5(for now)
Axle/Gears: 3.45 9 Bolt
Originally posted by john1221
I bought a set of pro's for an 88RS convertible but sold the car before I installed them. My neighbor bought the car and put them on along with adaptors to mount C5 vette wheels. It looked awesome. The question I have is even though it is an improvement over the stock suspension how much lower or stiffer is it over the IROC suspension-is it worth the money?
I think it is well worth the money
and my car handles way better than my stock Iroc springs

my car came down about 2" in the front and just under 2" in the rear
Old 06-19-2005, 11:57 PM
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Car: '89 Iroc Vert
Engine: 355 TPI
Transmission: T-5(for now)
Axle/Gears: 3.45 9 Bolt
Originally posted by Cadillac
This is all done for the look, right? The whole "slammed" thing?
the look but it also handles way better

here a shot of me and my bro's car noes to noes

his is stock height mines got sportlines, look at the gap at the wheel well
Attached Thumbnails lowering springs-slammedvsstock.jpg  
Old 06-25-2005, 11:39 PM
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Car: 88z
Engine: 305
Transmission: t-5
I put dropzones on mine about a year ago 1.75" drop all the way around 100 bucks on ebay. Take bumps at an angle and, keep the front nose clean.
Attached Thumbnails lowering springs-dsc03980.jpg  
Old 07-12-2005, 10:55 PM
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Car: 1991 Z28 Convertible
Engine: 305
Transmission: 5 Speed
I love the lowered look, and frankly, its a vert, a piece of art anyway.

I have a 91 but I do not have the 91 rims. I am thinking of going large, 18's or even 20's. Will I have any problems lowering my car with the larger wheels.

Any suggestions on wheels would be appreciated, I like the IROC look and they make an IROC style wheel in an 18 and 20! Have any of you seen anything like it?
Old 07-13-2005, 08:46 AM
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Car: 1989 Formula
Engine: 305
Transmission: T5
The 18" IROC's look dead sexy on a vert IMO. I think 20's might be a tad much though...



Not my car, BTW, belongs to Mr. Z06...

Last edited by Joel07; 07-13-2005 at 08:50 AM.
Old 07-13-2005, 09:07 AM
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Car: '90 RS Vert
Engine: 305 TBI
Transmission: 700-R4
I Thought...

Dangit!
I thought I was about through doing appearance/suspension work to my vert. Now you guys have me thinking about lowering...

Speedy
Old 07-13-2005, 11:29 AM
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Car: 1991 Z28 Convertible
Engine: 305
Transmission: 5 Speed
The 18's look great on the Z28. Mine is just being painted black (original color) and will be very similar to the one pictured. Joel, do you know how much that vehicle is lowered and if there were any "fitment" (who invented that word) problems?
Old 07-25-2005, 03:21 PM
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Car: 1989 Formula
Engine: 305
Transmission: T5
Joel, do you know how much that vehicle is lowered and if there were any "fitment" (who invented that word) problems?
Have no idea. I lifted that pic from the thread above with all the Vert pics, I've never actually even talked to the guy. I just drool over that picture so much, I thought I'd post it...
Old 07-25-2005, 08:25 PM
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Car: 89 Iroc Z Cnvertible
Engine: 409 SR
Transmission: 6 speed
Originally posted by NoCal91Convert
The 18's look great on the Z28. Mine is just being painted black (original color) and will be very similar to the one pictured. Joel, do you know how much that vehicle is lowered and if there were any "fitment" (who invented that word) problems?

http://www.iroczdesigns.com/

I think the owner of the car goes by Mr. Z06 on this board.

IIRC, there was some "cutting" involved.

HTH
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