tom_c5

Anybody happen to have info on spring rates? Looking at swapping out my front/rear springs for something more agressive. I currently have the "soft ride" springs FE1. I was looking at going to the C5ZO6 springs and as far as I know the springs rates for the Z06's are 526/714lbs for front/rear. I am not sure what sort of difference I am looking at when going to these. BTW I already have Z06 swaybars and shocks so i thought the new springs would work well with my current setup. any info would be great.

tom_c5

anyone know the part numbers for C5ZO6 springs?
I found this information on Gene Culley's April Specials post:

Z06 front suspension spring – part no. 25962573
Z06 rear suspension spring – part no. 22188038

I found a "how-to" on LS1 tech website and the part numbers for the ZO6 springs don't match Gene's. They reference a part no. 22178729 for the front spring which doesnt match. The rear spring part no. does match Gene's, however. What's the deal maybe GM changed the vendor or part no.?

any info would be great!

Thanks

Tom

Trigger Creep

Part #'s do change. Sometimes a stock number is listed instead of part #. Who knows?

Post in the technical or road racing forums. Maybe those guys can help.

PSU 98

I did this swap and I don't regret it.
The part #s did change at some point.

SaberD

look for some used springs. there are usually some in the for sale section. they will be no different than new, and you will save hundreds. brand new springs are rediculously priced.

warpster

This is from http://forums.corvetteforum.com/c5-t...f-springs.html

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

-------------------------------------------------
Those numbers look odd to me, too many decrepencies...
I think these are correct...
If I get my coilovers (soon) I will have a set of FE3 springs for sale. Front is the same as the Z06 and rear is between base and Z06.

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

old stingray

Thanks for the info.