Finding the right cylinder heads
#1
Finding the right cylinder heads
I have a 2000 excursion with a 6.8 v10 putting the heads back on it and notice that the intake manifold inlets are not the same. I have been researching for hours and have had no luck as to why or what the difference is. I find one or the other randomly used as the item picture. I have check many different years of this engine and also different vehicles it comes in same result. Could anyone help with what the difference is and which one I need for my engine? I have not checked the engine yet to see if it matches the truck yet. Also do i even need to worry about it? My thoughts are that one definitely has lagers inlets than the other causing an uneven amount of air resulting in unbalanced power banks. Just a thought, as i'm unsure as to how sensitive these engines are.
#2
I haven't seen any V-10 heads up close and personal with the intake manifold off to make the comparison so I'm just throwing this out there as a possibility. Are both of those heads the "PI" (Performance Improved) version? Maybe the one with the bigger ports is a PI head and the other is an older non-PI head that was swapped on earlier in it's life.
Look on the exhaust side of the heads just above the ports for this "PI" identification on both heads.
Look on the exhaust side of the heads just above the ports for this "PI" identification on both heads.
#3
#4
#7
I apologize for the depart on the original post.
Has anyone used PI heads with the non PI intake? on the 2.3 4cyl the hot set up used to be oval port head with D port intake. the step helps keep reversion from big cams from making it up the intake and oddly improves flow.
Has anyone used PI heads with the non PI intake? on the 2.3 4cyl the hot set up used to be oval port head with D port intake. the step helps keep reversion from big cams from making it up the intake and oddly improves flow.
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