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Re: 5.7 vortec rebuild ?? will non vortec heads work ?
Iui
Quote:
Originally Posted by Tom
Yes the cam has more lift for a given duration, that's a product of the fast ramps you referred to that open the valves so quickly. The ramps can be steeper due to the roller so more lift for a given duration. That aside, lift doesn't really affect the engines operating range, duration does. And in that area the vortec oem cam is still absurdly tiny.
As for the pistons, yes I get domed pistons don't propagate the flame front as efficiantly as a flat top or dished piston, but at a 9:1 ratio or so it won't be too big a deal. Besides, after seeing inside some European engines lately like the 5.0 from jag/land rover or the 3.0 from Audi, Im really starting to wonder how much faith to put into flame fronts and all that jazz.
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The vortec cam may be absurdly tiny but I smoked a 5.3 Silverado with mine saturday.
The L31 cam makes a lot of torque.
Last edited by garyd1961; 01-27-2020 at 09:27 PM.
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