Composite spring weight lb recommend
Thread Starter
Heel & Toe
Joined: Apr 2025
Posts: 21
Likes: 2
From: Clarksville
Composite spring weight lb recommend
What is the best (I know this is subjective) spring weight for a rear composite spring? I'm not sure what the current lb i have on my car, but it way too soft. I fill up with gas and the car sags many inches, not to mention a ride that feels like a 1980's minvan in the rear. I have Bilstein B6 shocks (I'm pretty sure, the ones for standard ride height). I saw that VanSteel has 300lb, 330lb & 360lb version, as a reference.
I'm after a firm, but comfrotable ride. Something that feels a little like a sports car, but not track-day level or anything.
What have y'all tried and found to be the sweet spot?
I'm after a firm, but comfrotable ride. Something that feels a little like a sports car, but not track-day level or anything.
What have y'all tried and found to be the sweet spot?
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
I have the VBP (now VanSteel) 420 lb. composite spring on mine. It weighs 6 lbs., the same as the 360 lb. spring. My old stock steel spring weighed 43 lb. I have QA-1 adjustable rear shocks, with the ability to dial in the comfort level you want.....softer for the street, or stiff for the strip.
Melting Slicks
Joined: Sep 2016
Posts: 2,228
Likes: 981
From: Wauconda IL
Majority of C3 owners with composite rear springs have the 330 lb. Mine has a 330 lb.VB&P composite spring along with Bilstein B8's. It's a firm but not jarring ride. Corners very nicely for a 50 year plus car.
Last edited by sunflower 1972; Jun 1, 2026 at 03:21 PM.
Race Director
Joined: Nov 2006
Posts: 13,225
Likes: 7,823
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
I agree. Right around 330 - 340 lb spring with B8's. I also run a VB&P 330 with a 3/4 inch rear sway bar and B8's. It rides and handles great.
Thread Starter
Heel & Toe
Joined: Apr 2025
Posts: 21
Likes: 2
From: Clarksville
Thanks for the suggestions!
A question - my C3 when i got it definitely wasn't lowered, so when i threw shocks at it (I didn't realize the rear spring was so saggy initially), so I went with the Bilstein B6's, rather than the B8's. Would there bey any issues using the 330lb ( or similar) with the H6's regarding ride height or anything like that?
A question - my C3 when i got it definitely wasn't lowered, so when i threw shocks at it (I didn't realize the rear spring was so saggy initially), so I went with the Bilstein B6's, rather than the B8's. Would there bey any issues using the 330lb ( or similar) with the H6's regarding ride height or anything like that?
Race Director
Joined: May 2006
Posts: 18,728
Likes: 2,579
Thanks for the suggestions!
A question - my C3 when i got it definitely wasn't lowered, so when i threw shocks at it (I didn't realize the rear spring was so saggy initially), so I went with the Bilstein B6's, rather than the B8's. Would there bey any issues using the 330lb ( or similar) with the H6's regarding ride height or anything like that?
A question - my C3 when i got it definitely wasn't lowered, so when i threw shocks at it (I didn't realize the rear spring was so saggy initially), so I went with the Bilstein B6's, rather than the B8's. Would there bey any issues using the 330lb ( or similar) with the H6's regarding ride height or anything like that?
Drifting
Joined: Jul 2009
Posts: 1,534
Likes: 14
From: Dallas-Fort Worth TX
Since VBP is no longer. Where is the best vendor to go to for a more narrow composite spring in the 330-360 lb range? Would like it more shorter/narrow as the extended bolts are very close to the tire. thx.
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
I believe VanSteel has the old VBP springs (narrow composites).
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Sep 2016
Posts: 2,228
Likes: 981
From: Wauconda IL
