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Re: Biggest Valve Size in Stock Aluminum Hemi Head
[Re: LaRoy Engines]
#1387184
02/14/13 03:49 PM
02/14/13 03:49 PM
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Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
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Quote:
Should the question be, What is the biggest valve/camshaft combination I can run? Playing with tappet lift, times the rocker arm ratio, during the overlap phase, was very interesting.
Cam selection is cam selection...Bigger valve is more flow at lower lift regardless of cam. He will need as much flow as he can get with that many cubes, and I would suggest the full CNC port on the heads. Saved the money up front by buying stock heads, now its time to pony up for the flow the engine will need.
My experince on playing the cam game, got me a ton of worn out parts...Valve guides, the seats, lash caps, push rod tips, all kinds of stuff wears out rather quickly with high lift cams and some street miles on them...I should know!
Big cams and overlap are great, but it all depends on your intended purpose. Seems like Bullet cams is the way to go these days, I would call them with all the flow numbers.
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