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Re: 400-450hp 355 on a budget?
From what I know a roots will make more TQ in the lower RPM compared to a centrifical blower. But I have no first hand experience. I believe the centrififal makes more boost the faster you spin it.
Patriot makes a decent upgraded cast head for a good price. It is machined so you can run either a Standard SBC intake or a Vortec. It also allows you to get some lift on the cam and they flow pretty decent. If memory serves they make this same head in alum for $400-500 more.
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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