did u ever stop to think that there was a reason ford made the exhaust ports smaller than the inlets?

wen it comes to scavenging port velocity is critical, go bigger than optimum and the gasses slow down dramaticaly

hope u havent over done it mate

time will tell if he has - when he has done hopefully he can supply some good information showing if he gained or loss performance will the work he has done.

He may, and probably will, still gain some performance, but it may just be less than what he could have made with less work is all.
Not a huge deal in the end as long as he's happy with how it goes.

might bog down at low revs but screams its rings off at the high end! lol

I already have a ported and polished head on my car now ( 3.9 head on a 3.9 bottom end ), with original cam and rocker gear, inlet man etc, etc....
It definatley has more pull in the midrange to top end than before.
I had to set the mixtures back 15% from OE settings, at idle.
It doesn't appear to have lost any bottom end.
The exhaust ports are the same size as the valves on this head too. The valves fitted to this are from an EL.

 

 

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My 88EA cyl head ported & polished. 004.jpg [ 332.32 KiB | Viewed 136 times ]

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