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D.I.Y i6 head porting 

 

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 Post subject: D.I.Y i6 head porting
Posted: Sat Jun 23, 2007 1:07 am 
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Take a look at Best Fords, I got this copy a week ago. This info came from Brendan Mock at JMM (Jim Mock Motorsport).

 

 

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Posted: Sat Jun 23, 2007 2:07 am 
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Very handy... Bookmarking this for when I rebuild my i6
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Posted: Sat Jun 23, 2007 2:25 am 
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Might have a go, need to do the head gasket on the next few weeks so this looks like it might be worth a go. what advantages will this give? sorry I know its a dump question but I'm just starting out with all the engine mod stuff.

 

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Posted: Sat Jun 23, 2007 4:35 am 
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Get a 91AA head and do the work before you pull yours apart. I should be able to get you a good price on your head work (facing ect.).

 

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Posted: Sat Jun 23, 2007 12:39 pm 
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MoNGooSE wrote:
Very handy... Bookmarking this for when I rebuild my i6


mongoose, that was the issue I was talking about a few weeks back where they had an el xr6 turbo with build information.

 

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Posted: Sat Jun 23, 2007 12:45 pm 
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I did my head myself. You do need to be careful for where you remove the material from. Its not how much you remove, but where you remove it from, and port matching helps a lot.
The top cyl head is my ported one, and the one below it is a 94 EF cyl head.

 

 

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Posted: Sat Jun 23, 2007 12:55 pm 
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That looks awesome cjh, where did you learn to do it like tht?

 

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Posted: Sat Jun 23, 2007 1:02 pm 
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smiley235 wrote:
That looks awesome cjh, where did you learn to do it like tht?



I've been doing it at home for years, I like doing alloy heads, doesn't take as long, and with cast iron heads, its easier to get a smooth finish.
I have done motorbike heads too.

 

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Posted: Sat Jun 23, 2007 2:43 pm 
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cjh wrote:
smiley235 wrote:
That looks awesome cjh, where did you learn to do it like tht?



I've been doing it at home for years, I like doing alloy heads, doesn't take as long, and with cast iron heads, its easier to get a smooth finish.
I have done motorbike heads too.


Looks flash but arent you supposed to take that protruding edge off like in the top pics?
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Posted: Sat Jun 23, 2007 5:21 pm 
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FordFairmont wrote:
cjh wrote:
smiley235 wrote:
That looks awesome cjh, where did you learn to do it like tht?



I've been doing it at home for years, I like doing alloy heads, doesn't take as long, and with cast iron heads, its easier to get a smooth finish.
I have done motorbike heads too.


Looks flash but arent you supposed to take that protruding edge off like in the top pics?


I want to see how it goes with them in.

 

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Posted: Sat Jun 23, 2007 5:58 pm 
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that protruding edge doesnt need to be removed unless your going turbo, by removing that edge u lose compression, i have half of that edge taken out but not the whole lot due to the bigger valve hitting it so they were cut in half.
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Posted: Sat Jun 23, 2007 6:13 pm 
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Joesau wrote:
that protruding edge doesnt need to be removed unless your going turbo, by removing that edge u lose compression, i have half of that edge taken out but not the whole lot due to the bigger valve hitting it so they were cut in half.


So you know better than JMM do you?

 

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Posted: Sat Jun 23, 2007 6:28 pm 
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Look mate im not here to argue with you or knock JMM, all i know is removing that hump in the combustion chamber u lose compressiion!!
ANother big company in qld I THINK recommend u dont remove that hump in the head.

Have a look at Autospeed articles theres a big right up on head work for i6 eb threw to Au, my egdes have been half taken out pretty much all of it only to fit the extra size of the exhuast valve.

Im just telling you what i know and what ive been told, who knows the reason why JMM ported the head like that??? do u know??? maybe that head was going on a car to be turboe'dd u dont know!, just cos they ported the head like that doesnt mean u go out and do the same?? would they give away there top secrets in a magazine i think they know better than that especially the way they are with there cams everything is top secret mate, if u had a good thing going would u tell everyone the key??
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Posted: Sat Jun 23, 2007 6:46 pm 
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No the engine was not for a turbo.
JMM are not the only people to recommend the ED head.

 

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Posted: Sat Jun 23, 2007 8:11 pm 
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the reson the ridge is removed is because its is a restriction to air flow. i think thats pretty obvious when looking at it.

heres another DIY 4l porting article http://autospeed.drive.com.au/cms/A_1792/article.html

 

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