777Shock777

iTrader: (1)

I'm trying to find which Moog springs to run on my 88 GTA - I have returned it to stock and am wanting a stock-ish height.
I've tried:
Moog 5662 (706lbs) - These sat just a bit too high for my liking, cutting them made the ride too harsh.
Moog 5658 (579lbs) - sat just barely too low, putting weight on fender would compress to bumpstops. Rode nice/bouncy.

Does anyone have input on 5660s (639lbs) or 5608s (420lbs taller load/free height)?

Moog's website recommends 5662 w/16" wheels & 5608 w/15" wheels so I'm curious if anyone has any input on that too?

Fords88Bird

Wish i could remember what i came up with when i reseached that some years back.

Roorancher

Call Sam Strano.
stranoparts.com

QwkTrip

iTrader: (22)

Moog springs are designed to have 11 inch compressed height under the weight listed on their website. Those weights are sprung weight on springs, not the weight on tires. You'll end up sitting too tall if you use the scale weight of the vehicle.

taguy16

I've always felt Moog springs sit the car way too high for the model they list for your car's options (A/C, etc). It's kind of a crap-shoot finding ones that you like the ride height and feel of.

QwkTrip

iTrader: (22)

Back in 2020 I crawled the Moog website for every spring tied to any 82-92 Firebird and found 13 part numbers for front, 2 part numbers for rear. I just crawled their website again today and I'm shocked how many of those part numbers have been eliminated.

QwkTrip

iTrader: (22)

Based on Moog's published spring specs from their website, https://www.moog-suspension-parts.co...il_springs.asp

Static height with Moog-5660 will be right in the middle between Moog-5662 (taller) and Moog-5658 (lower).
Out of curiosity, how did you find that Moog-5660 part number?

Moog-5608 will sit taller than all those unless the car is on the very heavy side. Even then it will never sit as low as Moog-5660.

Fords88Bird

Hey OP check out my older thread - 'Spring rates for Moog 5660......'