Spring Rate Question
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4th Gear
Joined: May 2020
Posts: 4
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From: Cookstownn, Ontario
Spring Rate Question
I'm looking for the spring rate for the spring code BMA. I have several spring rate charts but none of them have a listing for a BMA spring. I have read somewhere that it's 110 N/mm but from the info I've been able to come up with, that just doesn't seem logical.
Instructor
Joined: Nov 2020
Posts: 128
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From: Detroit Michigan
I believe the BMA is the non z51 spring for the 84's and the BMB is the stiffer 102N/mm spring found on the Z51 cars. I have a BMA in the front of my 84 which does not have the z51 package. I've not been able to find any specific ratings for the BMA code. The Corvette action center chart lists a non-Z51 spring at 63.5, but it doesn't make senseto me as it has a stiffer spring in the rear for non-Z51 cars.
There's some older posts on here that say the BMA is an early Z51 spring, but I've never seen any numbers to back that up.
There's some older posts on here that say the BMA is an early Z51 spring, but I've never seen any numbers to back that up.
Last edited by Yinzcity; Nov 9, 2020 at 03:48 PM.
Thread Starter
4th Gear
Joined: May 2020
Posts: 4
Likes: 0
From: Cookstownn, Ontario
I agree with all of your comments as I have 2 84's, one is a Z51 and the other is not. The Z51 has the correct springs for that option, according to the Corvette Action Center spring chart, but the non-Z51 model has a BMA coded front spring, which is not included in this chart or any other chart I've seen. I was just hoping that someone knew what the spring rate was of this spring and it's not some "Made in China" knock-off someone has stuck in there to save a bit on money.
Last edited by rahsputyn; Nov 9, 2020 at 09:16 PM.
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