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????ported stock heads????

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Old May 9, 2006 | 04:21 PM
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Default ????ported stock heads????

Need some info on specs if any one has ported or played with their stock ls1 heads.Just let me know the specs
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Old May 9, 2006 | 05:35 PM
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I ported my friends heads. 99 Vette 6 speed. We took off the 853 castings and put on some hand ported 241 heads. Lightly cleaned the intake ports and port matched the exhaust, polished the chambers. LS6 intake, Cam 232/236 114lsa .567 lift, 1 3/4 headers no cats, 3" x pipe and the stock cat back He made 413rwhp and 383rwtq. I'm still trying to get him to ditch the stock mufflers and port the throttle body to see what it will make with better mufflers. It does still sound completly stock though, total sleeper.



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Old May 9, 2006 | 09:02 PM
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I picked up 37 rwhp with ported 241's and stock valves on my baby 244/248 cam. they were milled .040 too.
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Old May 9, 2006 | 09:21 PM
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I've had some questions along the same lines. if I get my stock heads ported/polished and milled, put bigger valves if possible. and of course change out rockers and springs (planning on doing cam and headwork at the same time) What would I be looking at (all headwork professionally done) for the headwork as compared to buying a set of nice heads. would it be worth it? also how much compression could I be looking at if I had the heads milled and a thinner head gasket?

I'm not trying to steal thread, just figured since it was along the same lines I'd ask a few questions I had. Thanks.
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Old May 9, 2006 | 09:38 PM
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i posted last week on my specs.. flowed 284/191 @.550 290/200 at .600 milled .006, 64cc, 218cc

Last edited by 8GTOKLR; May 11, 2006 at 09:31 AM.
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Old May 10, 2006 | 09:29 PM
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thanks gtoklr.
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Old May 10, 2006 | 10:06 PM
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Im playing with a set that was already ported...but the polish job was non-existant...I'll be getting them flowed as soon as I finish them up. There were supposedly flowing in the 310 range as they were, but no flow chart to back them up. We shall see. My cam will not be near as big as orangeapeel's "baby" cam but I'll be happy with 400ish on a Mustang dyno....for a little while anyway
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Old May 13, 2006 | 05:50 PM
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any more input?
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