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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

Do the heads on a 6.5 flow more air than the heads on a 6.2? If not, is one better than the other? I have both, and idk which to put on my engine.... JOIN NOW TO REMOVE TRACER

6.2 heads vs. 6.5 heads

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  #1  
Old 12-05-2008, 03:00 PM
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Default 6.2 heads vs. 6.5 heads

Do the heads on a 6.5 flow more air than the heads on a 6.2? If not, is one better than the other? I have both, and idk which to put on my engine.
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Old 12-05-2008, 03:40 PM
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i think the first couple years of the 6.2 the heads were the best flowing after that i dont know. what year are both your heads

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Old 12-06-2008, 11:55 PM
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6.2 glow plugs will hit the 6.5 turbo setup on some trucks........

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Old 12-08-2008, 10:23 AM
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Originally Posted by Woody35 View Post
i think the first couple years of the 6.2 the heads were the best flowing after that i dont know. what year are both your heads
i think the 6.5 is a 94. idk about the 6.2, theyre millitary
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Old 12-08-2008, 06:08 PM
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6.2 civvy and 6.2 mil-spec stuff is the same.......
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Old 12-08-2008, 08:12 PM
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6.2 Heads are the better flowing ones. Pull out the old Die Grinder and you can make them flow some more.
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Old 12-08-2008, 08:14 PM
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Originally Posted by SPEAKSUP View Post
6.2 Heads are the better flowing ones. Pull out the old Die Grinder and you can make them flow some more.
Agreed, but even stock they flow better, so I'd use the 6.2 heads if they are in good shape which I'm assuming they are

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Old 12-08-2008, 08:19 PM
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Originally Posted by bobcat67 View Post
Agreed, but even stock they flow better, so I'd use the 6.2 heads if they are in good shape which I'm assuming they are
Well Yeah they are stock to stock the better heads. But just saying if you have the Time even Gasket match the ports get some better flow.
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Old 12-08-2008, 08:36 PM
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Originally Posted by SPEAKSUP View Post
Well Yeah they are stock to stock the better heads. But just saying if you have the Time even Gasket match the ports get some better flow.
yeah might as well do it right if you're gonna do it! these smilies on here are so much better than other places haha
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Old 12-08-2008, 08:44 PM
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Originally Posted by bobcat67 View Post
yeah might as well do it right if you're gonna do it! these smilies on here are so much better than other places haha
HAHA Yeah the are. If you checked the last Diesel Power Mag they had the .5 with Sequential Twins that is using Ported 6.2 Heads So goes to show yo that 6.2 is the better way to go. Next thing to worry about is the 6.5 block it's not exactly the strongest.
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