front springs on a 68 - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

 
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post #1 of 4 (permalink) Old Nov 27th, 01, 05:19 PM Thread Starter
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I have a 68 origionally a 6 banger. was there any difference in the front springs,compared to the 8s or were they all the same except for the BBs? I am putting a 400sb in it,and would like to know if I will have any problems with the front springs.
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post #2 of 4 (permalink) Old Nov 27th, 01, 08:34 PM
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David Pozzi
 
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The factory rates are unknown, but Moog replacement spring numbers are similar between 6 and 8 cyl applications.
Rates are around low 300's per inch. as far as I can tell.


Moog 6308 379 lbs per inch, is a nice street spring with good ride and will lower the car maybe an inch with a sb engine. I would consider this a minimum street replacement spring rate.

A better street rate for spirited street driving or lowered by two inches or more, would be 400 to 550lbs for good handling with slightly oversize tires, 7 to 8" wide wheels.

For fairly wide tires with rolled back wheelwell edges and 8" wide rims, a 650 to 725 rate is good. Hotchkis and Guldstrand sell springs in this range. These would work on a road course or autocross.
David

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post #3 of 4 (permalink) Old Nov 27th, 01, 11:41 PM
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i think small block springs differ from big block springs.

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post #4 of 4 (permalink) Old Nov 28th, 01, 12:54 PM
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Scott
 
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On 67's I believe the GM Chassis manual shows 3 or 4 different coils.
The 6 cyl and base 327 cars had the weakest coils. The 327 w/AC and 350s and base big block cars had a medium coil. The Z28s and BB cars with AC had the beefest coil.

Another difference is the 6 bangers and base 327 cars had a smaller diameter center steering draglink. Where the 327 w/AC and Z28's had a 1/8" larger diameter center link.

There were further differences where the steering knuckle/arms connected to the spindles were shorter on fast ratio power steering boxes too. But, you can get by with the longer steering arms if you convert from manual to power steering.
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