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Old 05-30-2016, 10:55 PM   #30
Adger Smith
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Join Date: Dec 2001
Location: Texarkana Ark/TX
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Default Re: 350/255HP Help please

Painter,
I'm with you on the cam deal. It would make sense that the RPM is down if the intake or Ex lobes were not in the right place. (not just the intake C/L)
I still stand by the hot vs cold leak. If your looking for a problem look at all parts of it as the engine runs. The bad ex seats could kill the RPM, too. I would pull the intake and look for signs of bad reversion. That would point to cam and or a couple other issues as well as ex diluting the intake charge. OH, if you can't find an exact cause go slow and just make one change at a time. don't dig yourself deeper in the hole.
Good luck..
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