Camaroguy22

I know that all base suspension springs are the same for C5 years.

Does anyone have the spring rates for all the different springs/years.

Ex the rates for 97-99 Z51 springs vs. 00+ Z51 springs etc.

Bink

The Z51 front is 502lbs/in
the rear is 645lbs/in

the Z06 front is 526lbs/in
the rear is 714lbs/in


Stock Z06: 526# Front, 714# Rear
T1: 582# Front, 793# Rear

sources-

http://forums.corvetteforum.com/show...23&postcount=3

http://forums.corvetteforum.com/show...0&postcount=21

http://forums.corvetteforum.com/show...k+spring+rates


Hope this helps some.

Camaroguy22

Thank you. I should have clarified what I was after. I have read on here there are differences between A4 and M6 Z51 springs and also differences between 97-99 and 00+ yet I cannot find any actual spring rate numbers to tell that difference.

bcseitz

The "Sticky's" are a great place to find info. !
Yes, the base and Z51 cars w/A4's have a slightly beefier rear spring.
From the "Weights, Measurements, ect, ect," "sticky" on C5 General:

Spring Rates
439.66 lb/in, front; 576.70 lb/in, rear (manual trans); 588.12 lb/in, rear (auto trans) --- FE-1/Base --- Source
440 lb/in, front; 577 lb/in, rear --- FE-1/Base --- Source
457 lb/in, front; 577 lb/in, rear --- MSRC --- Source
525 lb/in, front --- FE-3/Z51 --- Source
660 lb/in, front --- FE-3/Z51 --- Source
327 lb/in, rear --- FE-3/Z51 --- Source
633 lb/in, rear --- FE-3/Z51 --- Source
634 lb/in, rear --- FE-3/Z51 --- Source
525.31 lb/in, front; 633.80 lb/in, rear (manual trans); 645.22 lb/in, rear (auto trans) --- FE-3/Z51 --- Source
525 lb/in, front; 634 lb/in, rear --- FE-3/Z51 --- Source
620 lb/in, rear --- FE-4/Z06 --- Source
650 lb/in, front; 680 lb/in, rear --- FE-4/Z06 --- Source
525 lb/in, front; 714 lb/in, rear --- FE-4/Z06 --- Source
650 lb/in, front; 800 lb/in, rear --- T1 --- Source
1,000 lb/in, front; 680 lb/in, rear --- Danny Popp's setup --- Source
77 N/mm --- FE1 & F45 front suspension spring rate --- SAE SP-1282
1.15 Hz --- FE1 & F45 front suspension ride frequency --- SAE SP-1282
103 N/mm --- FE1 & F45 rear suspension spring rate --- SAE SP-1282
1.36 Hz --- FE1 & F45 rear suspension ride frequency --- SAE SP-1282
1.18 --- FE1 & F45 Ride frequency ratio --- SAE SP-1282
93 N/mm --- FE3 front suspension spring rate --- SAE SP-1282
1.20 Hz --- FE3 front suspension ride frequency --- SAE SP-1282
113 N/mm --- FE3 rear suspension spring rate --- SAE SP-1282
1.45 Hz --- FE3 rear suspension ride frequency --- SAE SP-1282
1.21 --- FE3 Ride frequency ratio --- SAE SP-1282

Camaroguy22

Yes I have read that sticky before, thank you. The sticky has jumbled numbers that do not make sense. It also does not have any distinction between years. As one member stated that 99 and older have different rates I still have seen no numbers pointing that out.

TorchRed00FRC

Here is the info I have found on spring rates.

Springs
Base...440/577
FE3 -Z51....525/634
FE4- Z06....525/714

I think what changed in 2000 FE3-Z51 suspension was the sway bar sizes were increased. • Z51 swaybar diameters grow (25.4/21.7 to 28.6/21.7 to 28.6/23.6 (note: new rear same as Z06). I do not find anything suggesting that the spring rates changed.

Going by the part number molded in the the spring, I know at least the 2000 FE3-Z51 option had the same front spring as later years Z06. I purchased a set of Z06 springs to swap out the Z51 and only did the rear spring since the front was the same. Then sold the Z51 set for what I paid for the Z06 set. No cost modding!

Camaroguy22

So is this Z51 front spring part number # 22171750 the same as the Z06 front?? (looked but could not find anything)

ICaughtVetteFever

Z06 Front spring: 22178729(same as 00+Z51)