I tried a search but didnt come up with anything promising.

Two questions:

1. My FRC is uneven in the rear by a 1/2 inch. I have checked all the stock lowering bolts and they are equal. My driver side rear is 28" from the ground to fender and my passenger side is 27.5". I have checked it on several different flat pavements, all with the same result. Any idea's what it might be? I do have 19" wheels out back with Bilstein shocks, dont know if that matters. I want to lower the car more but more importantly I want it to be even.

2. The stock bolts are maxxed out as far as lowering goes. Any idea why the car just isnt lowering any?

Front heights are 27" from ground to fender on both sides.
Rear heights are 28" on driver's rear, 27.5 on passenger rear.

To my understanding these measurements are close to stock ride height, but I have the bolts set to be lowered the max. Any idea's?

Thanks
Jon

 

Where are you measuring as to how far down your car went? If you are measuring from the pannels it's not going to work because they are all over the place; the closest method would be to measure from underneath the body where your lift-pucks go in.

 

Some people say that shocks have nothing to do with the hieght but after putting on z06 shocks my car never went down as far as it did with the stocks. I had to buy lowering bolts to really get it down. Perhaps your bushings are uneven.?

 

I think it might be something to do with the shocks too. I just figured I'd ask since I'm new to C5's. I checked all the bushings, and they showed equal size. Well I assumed there equal because they all had 3 "tiers" showing.

 

I'm having the same problem. Is there a mechanic in the house?

 

shocks may be the problem

 

After I bought the lowering bolts front and rear and west coast corvettes DOES sell C-5 front lowering bolts some say you have to buy C-6. The car sets just how I wanted it. Zip-products sells the whole set front & rear for only $39.95 and west coast it costs $24.95 for the front and $49.95 for the rear. I wish I had bought mine from Zip but did not find it til I already purchsed the others. I will say that after viewing but sets the ones at WCC do look to be built a bit better.

 

Thanks for the tip, do you have aftermarket shocks on your vette?

 

I had/have the same issue on my 04 z06. I have stock shocks. I was lowered max on stock front and back bolts, but the passenger side was always 1/4 inch higher on the rear and front side. I recently got longer bolts in the back , and C6 bolts for the front. I installed the front C6 bolts and lowered them max. I installed the rear longer bolts and initially set them up to be equal threads side to side. I then discovered that I was still 1/"4 higher on the passenger side (front and rear). I have been playing with it in the last 2 weeks. I left the front C6 bolts lowered max (like the look ). I have been adjusting the rear bolts and got the rear side-side equal. I now am only 1/8" off on my side to side in the front (front pass higher 1/8"). I have been told that lifting my rear drivers side slightly will help lower my front passenger. I plan to lift my rear drivers 1 turn to see what happens to my front passenger side. If it does not work then I will go back and leave it with the rear side-side equal, and life with the front passenger 1/8" higher than the front drivers side...

Coil-overs next if it bothers me that much.... I don't think I could get that excuse past the wife though.

Hope this helps.
Toque

 

I'm purely guessing here, but... The transverse leaf springs on our cars are located simply by where the rubber isolators rest on the leaf itself. Imagine if you will that the isolators are 1/2" off to one side or the other. That will change the spring rate for each side of the car, making one side higher than the other even if you set the bolts the same. I remember that when I upgraded to Z06 springs, the isolators felt fairly solid on the leaf, but I didn't really mess with them. I assume they just slide on and off, and that some guy somewhere is in charge of installing them and they're not perfect.

Again, just guessing, but the theory is sound in my head....

 

could be, it makes sence if what you said is all accurate. So in my case you think the spring is 1/2" to the driver side which would make it higher on that side, right?

So I'm understanding here, when you guys say spring, your refering to the leaf spring right? Goes across the bottom from one side to the other?

Jon

 

Tha's the spring I refer to, but your math is backward. If the spring is too far to the left, the spring "arm" would be longer, making it less effective, lowering that side, not raising it.

 

Torque- I will probably just get the lowering bolts from Zip and try that. Hopefully I can get it adjusted how I want. If I was you I wouldnt worry about a 1/8". But if your just EXTREMELY picky then go for the coil overs.

Jon

 

Oh ok, I see what your saying now. Longer on one side + weight of car= more sag. I got ya. I was thinking in terms of traditional spring being longer (taller) raising the car higher. I got it though.

 

I am using Z06 shocks. I was going to get Z06 springs but I think now I want to save up for Coilovers.

 

So in my case where the passenger front is slightly higher than the driver front....... Its possible that the leaf spring is pushed more towards the drivers side. Correct ?

I will have to do some measuring tonight. That makes ALOT of sence.

To adjust this there are bolts underneath to loosen and move the leaf to center it ?

I'm glad I'm learning this BEFORE I got it aligned !

Thanks !
Toque

 

Yes, there are 2 brackets per spring, with 2 bolts each. The trick is going to be moving the rubber isolators on the spring. The isolators have a rib in them to center themselves in the mounting brackets. For all I know, the spring could have some detent in it that centers the isolator on the spring, or they could be bonded in some way, and you'll destroy the isolator trying to move it.

Remember, as much sense as it may make in theory, it's just a hunch. If you measure, and it's off, go slow and be careful trying to adjust it so as not to break anything. The brackets that hold the spring to the car just comerigh off with the two bolts. Real obvious.... They just sandwich the spring between the frame and bracket.

 

Great ! I will do some measuring tonight to see what I get.

Thanks
Toque

 

Is it possible that the car was aligned and ride height set with a driver in the driver seat? Did you get the car second hand and maybe the prev owner was a big guy?

What happens if you sit in the car and have someone take measurements?

Just a thought...

 

You should check out this thread: http://forums.corvetteforum.com/show....php?t=1934620
Start by measuring to the frame, not the fender.