Quote:
Originally Posted by art leong
That would take all the street Hemi's and send them to the old cars home. The stock ( as came on the car) springs are higher than that.
They already have Super Chevy races Do you want to make them all that way?
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The 69,70, 71 Street Hemi had single springs with a damper at 150 lbs on the seat and 320 open pressure specs. I have my old NHRA/IHRA engine spec book right in front of me as I type this. The 68 Street Hemi had 131 lbs on the seat and 280 open. The 66-67 Street Hemis had dual springs with the rating of 114 lbs outer and 53 lbs for the inner spring on the seat with 189 lbs outer seat pressure and 96 lbs for the inner open pressures (add them together) with solid lifters.The 68 and 69s had solid lifters also while the 70, 71s had hyd. lifters. The 68-71 had single springs with a damper. This was good for 7000 RPM operation. The street Hemis with an OEM oiling sytems and pans dont take to kindly to 8200+ RPM shift points for very long. I would think most all of the brand of engine combos would be OK with 150 lbs seat pressure and about 320 to 350 lbs open pressures unless they are running a cam with square lobes on it. By the way the 1969 440 six pack had a 150/320 lb pressure spec also.