Got a little cam for the 5.3
#12
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While you have the heads off invest some time to clay in the piston tops to check for piston to valve clearance.At least you'll know for sure what you have,before you encounter any major parts breakage.You'll need .100"clearance to be safe on the exhaust valve and maybe .080" on the intake.
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Anyone think it's to much for the 5.3?
This thread here gives a few details on why: https://ls1tech.com/forums/showthrea...aft+discussion
#17
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Originally Posted by ranwalk
I hope I am wrong, but I think you will be dissapointed in a cam that big. I dont think the roots/twin screw blowers work well with large cams. Be sure to post up some numbers when its done. Prove me wrong
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Originally Posted by Sport Side
I do.
This thread here gives a few details on why: https://ls1tech.com/forums/showthrea...aft+discussion
This thread here gives a few details on why: https://ls1tech.com/forums/showthrea...aft+discussion
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Originally Posted by 02sierraz71_5.3
only question is where in the rpm range will it be.
See, I can make a 220/220 110 profile peak at 6200 rpm. The same rpm that this 233/239 grind will. The only thing is, the 220/220 profile will make more torque from launch until 5000 rpm giving it the acceleration a truck will need. Where do you get that quick e.t.? From the 60'. You can make up ground by lower gears and more stall but, why not use a proper camshaft.
With a smaller motor you can make up for lack of displacement with very high rpms hondas s2000 is a good example. Nascar engines get around 700-800 hp out of a NA 358 at around 8000+ rpms.
I think Ed Curtis sums it up very well with this post: https://ls1tech.com/forums/showpost....0&postcount=29