Join Date: Sep 2000
Location: Walnut Creek, CA
Re: Front springs Recommendations
I too am deep into the process of selecting new front springs and while the weight of the engine plays into the equation I believe you need to know how much the front of the car weighs to select a spring by spring rating.
The front end of my 66 weighs 1,760 lbs. I subtracted the weight of the tires, wheels, spindles, brakes, lower control arms and come up with a front end unsprung weight of approx 1,545 lbs.
I currently have Hotchkis 512 lb/in springs and it WAY to stiff. They are 14.812 tall loose and 11.811 tall installed (1545/5.12=3.01 lower)
I want a spring with an 11.75-12 installed height because I like the stance of my car now but I want a softer spring.
The stock 66 front spring rate for a small block, no AC, 2 door hardtop was rated 250 lbs/in.
512 is to stiff and 250 is to soft so Im thinking something in the 300-400 lbs/in range.
So far my choice looks to be Moog 5246. They are rated 298lbs/in and are 17.3 tall loose. So at 1,545 lbs it should sit at 12.12 tall installed. Ill take an 1/8 spacer out of my lower control arm spring seat which should lower the front approx 1/4 (1/8x1.82=.2275)
Im still looking at other options too but I DONT want to do this again.
66 Chevelle hardtop - LFX 3.6 liter V6/6L50 6 speed auto trans, 3.07 10 bolt, full Hotchkis suspension, Wilwood 4 wheel discs, white with red interior, cowl hood.