5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

Exhaust Manifold Porting

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Old 09-09-2010, 11:30 PM
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Default Exhaust Manifold Porting

While I have my Super B Special pulled for some warranty work, I was kicking around the idea of getting my exhaust manifold ported. Sounds easy, but is that really the case? I figured I'd line up the gaskets mark where I want to port, then take a dye grinder to it... Is their anything special to be known before I take the grinder to it?
 
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Old 09-10-2010, 09:43 AM
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make sure its smooth when you done, and make sure there is some meat left when your done
 
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Old 09-10-2010, 02:44 PM
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i was thinking about doing this as well, i saw a thread some where else that had a really good write up and all the people that had done it said their egts drop 100-200* and the spool up time improved, some of them also took some meat out of the head and on the turbo flange as well
 
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Old 09-10-2010, 09:21 PM
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I'll let you guys know how it goes tomorrow... I'm going to take away from the inlets and some off the turbo flange. I really want to port the exhaust side of my head but I don't plan on pulling the head again for awhile...
 
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Old 09-11-2010, 11:12 PM
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a suggestion that i heard for porting the head was to make sure the cylinder you are porting is a tdc and stuff a rag or something in there and blow it out really good after your done
 
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Old 09-12-2010, 12:09 PM
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Originally Posted by cumminspwr11
a suggestion that i heard for porting the head was to make sure the cylinder you are porting is a tdc and stuff a rag or something in there and blow it out really good after your done
make sure its tdc compression/powerstroke so the valves are closed,

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i ported the manifold on my brothers vp truck and now she spools up really fast and droped temps a bit, i didnt gasket match thos just smoothed the inside and took down some sharp corners, started with a carbide bur and fisished with 200 grit cartridge rools
 

Last edited by wes-cummins; 09-12-2010 at 12:09 PM. Reason: Automerged Doublepost
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