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Old 08-25-2001, 11:25 PM
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Can you port and polish a 5 cyl diesel head?

In the gas V8 world, if you port and polish your cylinder heads it's an instant 30-50 hp over stock, for example in my '98 32V 4.6L DOHC Lincoln Mark VIII, w/ported and polished heads I added 45 dyno verified horsepower.

Can I take cyl head off of my diesel, port and polish it and make some more power??

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Old 08-26-2001, 08:38 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Most engines that are ported have RPM limits at 6,500 or higher. The diesel engine can muster around 4,800. Porting might pick up 5hp or a bit more but doubt that there would be any real improvrment. THERE is a company called Extrude hone that would do the head & intake and that might get you 10 more hp.

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