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Valve springs
Posted: February 21st, 2008, 1:48 pm
by dwg86
I'm trying to figure out what valve springs to run. Crane shows using 96806 for the 4.0. They only have 204 lbs/in. Is that enough pressure? The 99833 have 328 lbs/in and the 96803 have 330 lbs/in with a damper. Does anyone know the stock spring pressures? I haven't decided on a camshaft yet, although I know it won't be a Crane. I am thinking of a custom ground Reed camshaft.
Re: Valve springs
Posted: February 23rd, 2008, 7:06 pm
by seanyb505
Im thinking of getting the stock piece reground. Ive read about all the crane failures and I dont want to risk it even if it is only the lack of stuff in the oil. I want to use the older cam from 95 and down cause it has more lift and duration than the 96 and up stuff. As for the springs I think I may be getting the Mopar springs #5249464. Theyre rated to .525" of lift. As for stock pressures - "Seat pressure 85psi, open pressure (0.424" lift) 200psi" - Dr. Dyno