99Z28RS

I ordered a Pro-Kit this week along with some KBDD SFC's, wondering what those of you with the kit think and how it feels, any problems, and what did you pay for an install, thanks

mitchntx

iTrader: (14)

The install is really quite easy. There are several write-ups around that walk you through it. As far as getting it installed, it's a 3 or 4 hour job. So, whatever the shop labor is of the place you chose ...

Problems? Mine sagged really bad in the backend after about 10K miles. I replaced the Eibachs with G2s. 10K miles later, still seem fine ...

Good luck

minivette

My Pro Kit has been fine for the two years I've had it installed. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Fulton 1

iTrader: (9)

I've had my ProKits for about 18 months now with no problems. In my case (2000 SS with no SLP options) the drop was more than advertised (~ 1-5/8" front and rear). The car sits nice much nicer now - level and not too low, but it got rid of the 4x4 look <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />

Although Eibachs are generally well-matched to stock shocks, I would seriously consider replacing your shocks with a set properly matched to your new springs. This will save you labor costs versus doing them separately and you'll get better ride/performance. I'm very happy with my combo of SLP Bilsteins and ProKit springs, but if doing it over I'd contact Sam Strano since I believe he has revalved Bilsteins matched to the Prokit springs.

When lowering these cars you will also want to consider the following:

1) Get an alignment!

2) Consider LCA relocation brackets for the rear axle. When you lower the car the body drops with respect to the rear axle. This affects your LCA angle since it effectively lowers the front attach point vs. the rear. The relocation brackets will allow you to drop the rear attach point in accordance with the front. This way you can keep the control arms parallel to the ground as they should be. I'm still using the BMR bolt-ins myself and they've been fine.

3) Lowering may cause your rear axle to be pushed off center (toward the driver's side). You can verify this after installing the springs by dropping a plumbob from the top of each rear wheel arch. Just hold the string against the fender above the highest point on the rear wheelwell and measure the distance to a point on the wheel. Repeat on the other side. Left and right should be the same or very close. In my case I was off by about 1/8" after the Eibachs. An adjustable panhard rod will allow you to bring the rear back in line if necessary.

<small>[ December 13, 2002, 01:39 PM: Message edited by: Fulton 1 ]</small>

99Z28RS

well, i hope they dont sag, that would suck considering how much they cost, and ill have to wait a while for a ADJ panhard, and some reloc, brackets, but ive got a buddy with a stang with this kit and it rides and handles great and hes on stock shocks.
But all in all its a good upgrade from stock right?? dont tell me i payed for ****... <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

<small>[ December 13, 2002, 11:51 PM: Message edited by: 99Z28RS ]</small>

SunsetWS6

No the pro kit are very good springs, there aren't any better for handling. G2 are good for drag, but for handling the pro kit is the way to go. I have the pro kit with Koni S/A sport shocks up front & Bilstein HD's in the back along with a lot of other stuff. Stiff ride but at high speeds the car doesn't move & handling is superb. I don't have LCA relo brackets yet or an adjustable panhard rod. My rear is centered fine but I definitely need LCA relo brackets soon.

mitchntx

iTrader: (14)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SunsetWS6:
<strong>
G2 are good for drag, but for handling the pro kit is the way to go.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Wondering where you compiled that information.

The Eibachs have a linear rate rear, which, on my car sagged. When exiting a high speed, high G corner, it would bottom out, cuasing infinite spring rate and the car would push on track out.

The G2 springs are a progressive rate rear, alleviating the problem of botoming out and the subsequent spring rate problem.

The fronts are very close in rate, however ...

The G2 spring is definitely NOT a drag spring. Way too stiff for the kind of weight transfer you look for.

LS1Bird

I was (and still am) pleased with my ProKit springs. I used them for about 12,000 miles before I ever put on the LCA's, Relocation Brackets, and KBDD SFC's. I also never changed my shocks, which has worked out fine.

For pics, check out my website. I think all those pics are lowered, no 4x4 versions...

http://www.californiamasseys.com/formula.html

<small>[ December 14, 2002, 10:17 AM: Message edited by: LS1Bird ]</small>

RUSSH

Eibach pro kit and Bilsteins

mitchntx

iTrader: (14)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SunsetWS6:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> Wondering where you compiled that information </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Talking to various Auto-Xer's including Sam Strano</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So Sam told you G2s were for drag racing? Surely not ....

Sam has given me advice as well. Very knowledgeable individual.

He definitely doesn't like the G2s. Too stiff for his taste. But his taste is geared towards AX, which is a differnet dog from road racing altogether.

And for me, road racing more mimics street driving that AX does.

Fulton 1

iTrader: (9)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mitchntx:
The Eibachs have a linear rate rear, which, on my car sagged. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Mitch, unless I'm mistaken or they've been changed the Eibach rears are progressive. The fronts for LS1 cars are linear though.

mitchntx

iTrader: (14)

Went back and looked ...

It appears you are 100% correct. It was almost 18 months ago that I replaced the Eibachs on my car. I thought all along they were linear rate all the way around ... my bad.

As far as sagging rear springs, it was brought to my attention during this weekend's run ...
http://mitchntx.1le.net/MSR2.rm

There are a couple of places where you can see that the nose is way up in the air ... But stationary, the car sat level ...

And at the end of the video, is what happens when your brain sags! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

<small>[ December 15, 2002, 12:03 AM: Message edited by: mitchntx ]</small>

SunsetWS6

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> Wondering where you compiled that information </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Talking to various Auto-Xer's including Sam Strano, I was told the G2 springs were too stiff for them & in Auto-Xing prefered the pro kit. That being said I know G2 springs are not strictly drag springs because they are so stiff. I'm basing my information off of some pretty reputable & championship caliber Auto-Xer's which is good enough for me. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

99Z28RS

well thanks guys now i feel a little more confident in my choice <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> mitch kinda scared my talking about the sagging, but now that i see you guys have been happy with the kit, in th near future, (after new tires,and a brake job) ill look into shocks and some more suspension upgrades, should i get a shop to do these springs or could i possibly do it myself?

SunsetWS6

BTW Mitch Sam didn't tell me G2 were for drag. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> But you're right he's not a huge fan of the G2.

mitchntx

iTrader: (14)

I think it boils down to a personal preference and what has worked/is working for the driver.

All I know is my car "woke up" when I changed to the G2s ...

And sorry ... didn't mean to scare you. However, you asked if anyone ever had any problems. So, I answered. A friend of mine who drives a Z had to start using a 2x10 block under his rear wheels to get the car door open over his trailer fender. 6 months ago, this was a non-issue. He has 3 year old Eibach Pros ...