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Old 07-03-2011, 08:41 PM   #5
Super73
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Join Date: Nov 2007
Location: Bay Area, Ca
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Re: Best headand cam combo for 421 SBC

Quote:
Originally Posted by Marv D View Post
big inch sbc running under 6500 (which will be your limit with a hydraulic roller anyways) .


Marv,

Do you know the diameter of a stock SBC lifter? I'm wondering how close they are to LS lifters. I'd be curious to know also how the oil galleys look in comparision. If one could find a way to use a Hyd LS lifter, the CTS-V or LS7 lifter has been shown to work all they way up to 8,200rpm in the 24 hour CTS-V races. Obviously you need to be creative for oil control.

I know we have discussed Hyd lifters and their limints before, but I know from experience that the LS lifter works past 6,500. Even a bone stock LS1 lifter from 98-02. I had a set in my old motor spinning to 7,400. Even made a few dyno pulls to 7,800 with it.
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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