pro-kit
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Joined: Jul 2005
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From: Chesapeake va
pro-kit hey guys, i posted a similar thread i the suspension section abd figured u guys could help too!! i want to get the eibach pro-kit. My z28 has the stock wheels and the stock body kit on it and the kit will drop it 1.5" in the front and 1.3" in the back. does anybody else have this setup on thier z28 or a tras am with the stock wheels and body kit?
hey wassup, heres something to know from wat i learn.the verts all more heavy then the hartops so the vert with ls1 prokit will bottom out in the back alot.now if u get the lt1 prokit you'll have less problems.now for the ultimate upgrade problems free.get the lt1 prokit for the front and the bmr springs for the rear and remove the rear spring hat and u have a nice drop and no bottoming out problems
Launching!
Joined: Jul 2004
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From: Plano TX
now if u get the lt1 prokit you'll have less problems.now for the ultimate upgrade problems free.get the lt1 prokit for the front and the bmr springs for the rear and remove the rear spring hat and u have a nice drop and no bottoming out problems
I think the LT1 pro-kit uses the same rear spring as the LS1. The only difference should be that the LT1 kit has a taller front spring. I'm pretty sure that your advice might have an adverse effect.
One option that worked well for me in the past was Hotchkis springs with a coil cut out of the front in conjunction with SLP Bilsteins shocks.
Or you could try the Eibach's in the front and keep the factory rears, but remove the rubber isolater at the rear. I ran my last SS that way for about year with no problems or annoying noises. And that was with Bilsteins as well.
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Cutting the stock rear springs is actually a good idea. They have a rate of 110-115lb per inch. Every coil is worth about 20lbs. So cutting a half a coil will increase the rate 10lbs. This is a good thing as the factory rates are just too soft. To go stiffer while limiting the drop, you can use a combination of cutting and metal spacers in the springs. If you know how to do the calculations you can get just about whatever drop and spring rate you want. I personally have a 160lb rate in the rear of my non convertible along with the Koni SA shocks. 150 felt too soft and allowed more lean and more compression than I felt I needed, 170 was great for a performance feel, but a bit too stiff on the bumps for everyday driving, so 160 was just the right rate for me. All you need to cut them is a cutting disc mado for metal and a drill or similar tool to mount it in. Don't even think about a hacksaw.
BTW, the Pro-kits are well known for being too low in the rear. If you don't have the stock rear springs or just don't want to cut on them, then just get some metal spacers and install then into the coils 180* apart and on the same coil somewhere in the middle of the spring. 2 spacers will effectively deaden 1 coil, raise the ride height, and increase the spring rate. All good things for our cars.
BTW, the Pro-kits are well known for being too low in the rear. If you don't have the stock rear springs or just don't want to cut on them, then just get some metal spacers and install then into the coils 180* apart and on the same coil somewhere in the middle of the spring. 2 spacers will effectively deaden 1 coil, raise the ride height, and increase the spring rate. All good things for our cars.
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Originally Posted by satownz28
if u cut the spring doesnt that effect the integrity of it?
I picked up one of these:
http://www.lowes.com/lowes/lkn?actio...7AG&lpage=none
With a thin metal cutting disc it will slice through a spring with ease and with little heat.
Originally Posted by satownz28
also, im runnin sportlines on my 98 vert with t/d's and have very little bottoming out issues.....
Here's some ride height data if anyone is interested.
https://ls1tech.com/forums/showthrea...12#post4942812
TECH Enthusiast
Joined: Feb 2004
Posts: 546
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From: Central Iowa
Originally Posted by gyrene2003
hey guys, i posted a similar thread i the suspension section abd figured u guys could help too!! i want to get the eibach pro-kit. My z28 has the stock wheels and the stock body kit on it and the kit will drop it 1.5" in the front and 1.3" in the back. does anybody else have this setup on thier z28 or a tras am with the stock wheels and body kit?
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From: The beautiful Kingdom of Bahrain
You have a LT1. From what I gathered from the conversation the wieght diff is their trying to compensate for that's why theyre mixing and matching springs. If I may suggest why not go adjustable coilover using springs and shocks rated for the way youre going to drive the car?
Originally Posted by Honda Hunter
If I may suggest why not go adjustable coilover using springs and shocks rated for the way youre going to drive the car?
TECH Enthusiast
Joined: Feb 2004
Posts: 546
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From: Central Iowa
pro-kit
Originally Posted by Honda Hunter
You have a LT1. From what I gathered from the conversation the wieght diff is their trying to compensate for that's why theyre mixing and matching springs. If I may suggest why not go adjustable coilover using springs and shocks rated for the way youre going to drive the car?