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Thread: coilover spring rates
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11-02-2010 #1
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coilover spring rates
curious to know what anyone with coilovers and 4 link are runnin, for rates in the back? and anyone with coilovers on all 4 corners are runnin as well. just gettin an idea of what range people are rockin
'69 Figherbird
beauty's not in the budget
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11-03-2010 #2
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I have 550 on the front with my AME subframe (LS1) and 225 on the rear with my G-Bar.
Don1969 Camaro - LSA 6L90E AME sub/IRS
1957 Buick Estate Wagon
1959 El Camino - Ironworks frame
1956 Cameo - full C5 suspension/drivetrain
1959 Apache Fleetside
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11-03-2010 #3
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550 front, 200 rear. For comparison purposes, the AME subframe has a 0.68 motion ratio.
Matt Jones
Mechanical Engineer
Art Morrison Enterprises
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11-06-2010 #4
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how do the cars feel? i was considering going significantly higher rate front n rear. what do both of you mainly do, driving wise with your cars? mainly street or do they see any track time? im building mostly a track purpose, street legal bird.
guess i'll need to base it more on my weight distibution. plan is to recess my motor(ls2) back into the firewall 6+", not sure how far back i'll end up going. also, wanna ditch all front end sheet metal for a glass front clip. pretty big weight savings from the engine swap alone. hoping to shed close to 350+# off the front
anyways, just curious to hear what dudes are runnin.
'69 Figherbird
beauty's not in the budget
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11-06-2010 #5
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300 front and im starting my 3-link build with a 200lb spring in the back. The front has a motion ratio of 0.86
My car weighs under 2800 lbs.My build thread: https://www.pro-touring.com/showthre...ing&highlight=
The mustang build thread: https://www.pro-touring.com/showthre...el)&highlight=
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11-07-2010 #6
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580/600 lbs frond with aluminium engine and engine set back 4 inches.
300 lbs in the rear, BMR torque arm suspention. fuel tank relocated behind the frond seats. and lots of weight saving stuff on the car.
car is curendly being build.. so verdict is still out
11-07-2010 #7
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I'm planning on 650's out front with a motion ratio of about .7, there is so little weight in the rear I'm looking at some 167# springs out back.
Robert R.
1988 S10 blazer 5.0L SBC 700R4 body off build.
1991 S10 Blazer 4.3L too low daily.
1975 Cutlass Salon currenlty 350/th350
Stupidity should be painful.
11-07-2010 #8
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I have a modified Martz front clip on a 67 Camaro with LS motor, The angle of the strange coil-overs were increased creating less leverage (making car stiffer) Using a 550 front coil-over spring. I have a C Alston rear 4-link with strange coil-overs at slight angle to inner tire (also a little less leverage) Im using a 250 rear coil-over spring. I have recently run the car in some autocross and it is level as can be with 200 treadware tires. My suspension is stiff enought that the car would benifit from a slick type compond.... There has been a few videos posted on this site of my car running. Let me know if your interested and ill direct you to them.
Brett
fab53.com
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