This is topic e7 heads question in forum Tech Talk at Northern California Ford Owners  .


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Posted by Norgs (Member # 649) on :
 
how much of a power difference do ported e7s make? what are they similiar to?
 
Posted by Blue Oval (Member # 2548) on :
 
it really depends on how much they are ported ive seen 20hp gains with MILD porting.I have ported a set that flow as good as the GT 40-X heads, that was with extensive porting.
 
Posted by st5150 (Member # 51) on :
 
For the money, you're better off finding some GT40P heads instead of having a shop port your stock heads.
 
Posted by cobraman_1994 (Member # 467) on :
 
GT40 heads are around 400 or so. some cheaper, some more expensive. i would go that route [patriot]
 
Posted by HungryHippo (Member # 537) on :
 
do some research and home port those bitches! you should see 15rwhp with some modest exhaust porting and bowl work. more if you mill the heads and get a 3 angle. you'll need better valve springs with the e7's or gt40's, about 100 bucks from crane.
 
Posted by Fostang (Member # 3752) on :
 
If your wondering about the heads on the motor this the break down of what was done exactly and maybe people could come up with a guesstimate of how much hp it added.

Intake were all opened in a v shape to mate to felpro gaskets of course leaving in coarse to break apart the gasoline as it went in. The bowls were also blended and any real sharp edge I rounded it best I could.

Exhaust the bump was eliminated opened up to a set of 1 5/8 header tubes, with the bowls blended and edges again rounded off.

Took me quite sometime to do it. It's my 6th set of heads I've done and have only ruined 1 that I really went crazy on. If only the wall would have been a little ticker I was just about to stop I got it so nice and perfect I could fit 2 fingers no problem with nice round shape followed to the exit for the headers. Then bam I see a tiny hole.
 




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