Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - First time porting heads
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Old 01-07-2013, 09:43 PM
BuzzLOL BuzzLOL is offline
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.. Your setup should HP peak around 5500-5700 RPMs, shift around 6000 or so...

.. 275-60R15 rear tires should fit under there...

.. Porting the intake ports is most important... you only have a max of 14.7 psi pushing air into the intake ports of a N/A engine... several hundred psi pushing it out the exhaust... Comp cams claims you can reduce exhaust valve lift by 2/3's with little effect on performance...

.. The exception, of course, would be engines with really horrible exhaust ports to start with... I've had to remove the air reactor boss from the ports of a '77 351W engine, it blocks about 80% of the port which was small to begin with... it wasn't even used on the marine engine I was building up... Ford should have sold Mercruiser engines without them... I don't think Mercruiser even realized the bosses were in there, since they didn't change the HP rating after the engines started coming through with the blocked ports... Mercruiser switched to Chevy engines the next year...

Last edited by BuzzLOL; 01-07-2013 at 09:57 PM.
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