496, AFR290, Straub cam - Page 3 - Chevelle Tech
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post #31 of 32 (permalink) Old Aug 27th, 19, 3:08 PM
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Re: 496, AFR290, Straub cam

run a somewhat similar 496 combo with a solid ft comp xs-290-s cam (lot more tame than your spec). edelbrock ovals. a tick less compression than yours. got 625 ft/lb at 4500 610 hp at 6100. I think you are knocking on a strong 650+ hp. should be a tire killer... say this again - the 496 is a GREAT bbc combo...
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post #32 of 32 (permalink) Old Aug 27th, 19, 6:30 PM
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Re: 496, AFR290, Straub cam

Originally Posted by Wolfplace View Post
The Mahle stuff is pretty reasonable, it is an inboard pin design
Last one I did with a 4.500 Mahle & this rod......
PIN=148, RAIL=7.8, PIST=537, RINGS=39.3, LKS=2.3
ROD UP=223.6, LOWER=542.6
Total BW for this one was 2139.9
That's a long way from the old TRW pistons and GM 7/16 rods. Most of the bobweights I remember from 30 years ago were in the 2300 range. I have not used the Mahle pistons, will be looking at them in the future if my son needs a bracket engine rebuild.

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