1971 bb rear composite spring rate?
Thread Starter
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
1971 bb rear composite spring rate?
i have an original 71 bb auto. car has a composite rear spring. no manufacturing name but has a serial number and some other numbers. trying to decide what spring rate i have so i can order my shocks.
serial number is 0203139
other numbers in seperate blocks are 602 101 103 105
thanks for the help. also i know people are running 550 springs up front, any particular brand? are they all the same height? not looking for a skate board here just a solid handling car that my wife can drive every day.
by the way, looking at the bilstien hd shocks
serial number is 0203139
other numbers in seperate blocks are 602 101 103 105
thanks for the help. also i know people are running 550 springs up front, any particular brand? are they all the same height? not looking for a skate board here just a solid handling car that my wife can drive every day.
by the way, looking at the bilstien hd shocks
Thread Starter
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
muskegon brakes, i was told this was a trw spring. i know you are a dealer for them. does any of those number mean anything to you? the spring would have been purchased in 94 or 95. thanks.
Racer
Joined: Nov 2008
Posts: 315
Likes: 46
From: Chicago Illinois
Hi, you are correct this is a TRW spring. On the spring where the numbers were 602 101 103 105 if you look at this closely you will see that under the the 100 #'s one of them will be punched out or stamped, either a circle or a diamond. That is how you tell the spring rate.
101 103 105
-------------------------
315 340 355 rate
Here is a link. content.mamotorworks.com/pdf/602836.pdf
hope this helps.
101 103 105
-------------------------
315 340 355 rate
Here is a link. content.mamotorworks.com/pdf/602836.pdf
hope this helps.
Thread Starter
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
103 it is. 340 lbs. is this ok for a stock big block with factory rear sway bar? i just ordered the sport bilstien shocks and 550 lb front springs? i was kinda worried about ordering the shocks without knowing the rear spring rate.
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Thread Starter
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
250 lbs would be too bad for those streets. lol
thanks again for the help. i hope i can just pop off the lower ball joints and slip the new front springs in using my old trusty floor jack.
thanks again for the help. i hope i can just pop off the lower ball joints and slip the new front springs in using my old trusty floor jack.
