02-24-2018, 02:17 PM
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#34
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Registered User
Join Date: Dec 2011
Location: Yuma Arizona
Posts: 1,524
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Re: Vortec head problem?
Quote:
Originally Posted by '69 Gmc
I’m still iffy about the stock replacement rockers. In that video they are not using ‘stock’ stamped. They are Howard’s. Probably a true 1.5 ratio. Heck if you use a stock rocker that’s true 1.46 ratio that bumps my valve lift from .480 down to .467. That’s under the next smallest cam in the XE lineup. Comp cam site claims their roller tip 1.52s make 15-30 hp. That has to be due to an accurate 1.52 ratio vs stock. I’d like to have true 1.5-1.52 to know I’m getting the most from my cam.
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X2. Exactly
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