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Sep 6, 2004 | 10:57 AM

grumpy44

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Joined: Jul 2004

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porting

would anyone know how many cfm you would gain on a stock 351w head by porting it? Is it worth the effort? I would like to get as much horse power as I can out of it, without spending a whole lot of dough. right now I've got block bored 30, flat tops, 260/272 duration 486/500 lift comp cam, true roller chain set, perfomer intake somewhat ported, and I'm working on the heads now. putting in 1.6 roller rockers, new heavyer springs, new push rods and being on that subject should I use standard length on change the length to a shorter or longer pushrod? I don't really need any higher lift than I have and if I use the standard length it will raise it with the 1.6 rockers. but I don't know how much. maybe not enough to worry about. Don't know. not sure what carb I'm going with yet either. any suggestions? I think I've rambled enough. Suggestions would be nice and appreciated. thanks

Sep 6, 2004 | 04:23 PM

jwtaylor

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Use standard length pushrods or the ones that give you the correct geometry, you need to go with a different ratio rocker to change lift not longer or shorter pushrod.

Check this link out, you didn't state what year heads you have but the following links information will give you a general idea of what needs to be done, even if they aren't E7 heads. Good luck

-->PORTING LINK<--

Last edited by jwtaylor; Sep 6, 2004 at 04:27 PM.