Front coil spring compatibility

[denpo]

I found a good deal on a pair of MOOG 5758 front coil spring.
Some site says they're good for '80-'82 vette, some says it's good for all C3's, so possibly on my '76.
What do you guys think?

 

[Fuelie74]

I found a good deal on a pair of MOOG 5758 front coil spring.
Some site says they're good for '80-'82 vette, some says it's good for all C3's, so possibly on my '76.
What do you guys think?

It looks like they are calling that spring out for a non A/C car. The spring would work, there is no question about that. Looking at the specs on Moogs website for both springs it appears that both would ride the same, but the 5758 would sit lower.

Moog 5762

Bar Diameter - 0.656
Install Height - 10.00
Load - 1500
Spring Rate - 474
Free Height - 13.13

Moog 5758

Bar Diameter - 0.656
Install Height - 10.00
Load - 1400
Spring Rate - 474
Free Height - 12.94

 

[MYBAD79]

I have no "first hand" experience with these but MOOG is usually good quality "stuff".... now.... many guys across the internet posted good feedback for the 550lbs VBP springs, ride height is good and the ride is still comfy... I have these myself and I think they're great, would definitely recommend these springs :thumbs:

The MOOG springs seem to be a "stock" replacement although the rating seems high at 475 lbs/". A "stock" replacement spring will work better with stock shocks - for the 550's I wouldn't use anything but Bilstein or Koni shocks.

Ride height might be an issue, many aftermarket springs make the car look like it has a lift kit installed....

 

[denpo]

Thanks for the infos, At least I learned was characteristics I should be looking for when shopping for springs.
Comparing to RockAuto offering, this moog 5758 spring seems to have a install height 1'' lower than others, does it means the car would sit lower on the front?
MYBAD79, what makes you say those coils are stock replacement? They're rated much higher than 300lbs stock springs. Is that the fact they're constant-rate coils? I'm really curious to know.
My intends are to put Bilsteins shocks, would they match thoses coils?

 

[MYBAD79]

I'm thinking they're listed as "stock replacement" like many other Moog springs, as I said the rating is much higher than stock... how much are these ?? The VBP 550lbs springs work great, lots of good feedback from many happy customers... I'm not saying the Moog springs are not good but without any feedback from others who have used them I don't know that I would choose them over the 550's ... ok, if you can get these for like $30 then yes, it's worth trying. The VBP springs are $80 and you can find discount codes online.
I have not seen Moog springs advertized as "performance" springs in any of the catalogs or websites (Corvette parts vendors) ??


Here's what I found on RockAuto's website:
Moog offers two types of coil springs: constant-rate springs that restore handling to its original state, and cargo-coil, variable-rate springs as an upgrade for vehicles that carry heavy loads. Moog's constant-rate springs are built to replace original equipment springs, returning ride height and body sway to original performance levels. Replacing worn coil springs with Moog constant-rate springs restores vehicle handling. The cargo-coil, variable-rate springs change resistance as they compress and become progressively stiffer as the load increases.

Moog provides several features and benefits on both constant-rate springs and cargo-coil, variable-rate springs. On both, we heat-treat the alloy steel to ensure the coils rebound fully and resist sagging. While many coil springs are equipped with protective tubes to insulate the clash of metal on metal, Moog uses a premium urethane tube that will outlast our competitors' PVC tubes on both our constant-rate and variable-rate coil springs.

 

[denpo]

I'm thinking they're listed as "stock replacement" like many other Moog springs, as I said the rating is much higher than stock... how much are these ?? The VBP 550lbs springs work great, lots of good feedback from many happy customers... I'm not saying the Moog springs are not good but without any feedback from others who have used them I don't know that I would choose them over the 550's ... ok, if you can get these for like $30 then yes, it's worth trying. The VBP springs are $80 and you can find discount codes online.
I have not seen Moog springs advertized as "performance" springs in any of the catalogs or websites (Corvette parts vendors) ??


Here's what I found on RockAuto's website:
Moog offers two types of coil springs: constant-rate springs that restore handling to its original state, and cargo-coil, variable-rate springs as an upgrade for vehicles that carry heavy loads. Moog's constant-rate springs are built to replace original equipment springs, returning ride height and body sway to original performance levels. Replacing worn coil springs with Moog constant-rate springs restores vehicle handling. The cargo-coil, variable-rate springs change resistance as they compress and become progressively stiffer as the load increases.

Moog provides several features and benefits on both constant-rate springs and cargo-coil, variable-rate springs. On both, we heat-treat the alloy steel to ensure the coils rebound fully and resist sagging. While many coil springs are equipped with protective tubes to insulate the clash of metal on metal, Moog uses a premium urethane tube that will outlast our competitors' PVC tubes on both our constant-rate and variable-rate coil springs.

Yeah, saw that too.
I could get them for 40$+shipping. They're actually listed as Heavy Duty. I think I'm gonna give them a shot, if they're sitting too high I can still cut it a bit.
Thanks for taking time to help me out in my part hunt for a Corvette on a budget.

 

[big2bird]

Good choice. The original springs are designed for bias ply tires. The new Moog replacements are rated for radial tires, and ride much better.