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DIY headwork 

 

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 Post subject: DIY headwork
Posted: Tue Sep 08, 2009 11:21 am 
Getting Side Ways
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Location: melburn
VIC, Australia

i know there is already had work threads, but dont think they cover what i want...

while the head(s) are off my car i want to clean up the ports a bit - mainly just port match them.

you can buy a DIY porting kit for around $50, so i figure why not.
has anyone else had a crack at this themself?

theres quite a few good sites that have some good tech documents, so im not flying blind - but im not exactly doing a hectic port job lol, i already have an XR6 head which after comparing the ports to a stock head, they have already gotten rid of the meat around the valve guide and few other little spots. so a port match from the tracing of a gasket and also the same on the manifold with a blend job to the rest of the port should give a slight increase.

 

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mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: DIY headwork
Posted: Tue Sep 08, 2009 11:33 am 
Getting Side Ways
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Ride: 1995 EF Fairmont

Location: Auckland
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WagonDad did a pretty good DIY port/polish job that i have been studying quite closely. Im in the middle of porting a spare 91aa head that i have which will go onto my EF in the future. Havent got much done to it yet cause it takes time getting the ports, bowls and chambers to match or be nearly the same in shape, size etc. on each cylinder. So far ive only just done a little bit of work on the chambers, smoothing the whole chamber and de-shrouding the area around the valves a bit, but not to much as i want to keep it fairly consistent and still maintain a nice high CR.

http://www.fordmods.com/ford-4l-and-6-cylinder-f1/porting-head-this-weekend-t15925.html?hilit=wagondad%20port

 

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 Post subject: Re: DIY headwork
Posted: Tue Sep 08, 2009 12:01 pm 
Getting Side Ways
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awesome, thanks mate :)

 

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XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: DIY headwork
Posted: Tue Sep 08, 2009 1:32 pm 
Getting Side Ways
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Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

This is my cyl head, an EF 94AB head. I have port matched an ED intake to this head. Just needs one more light shave to remove some surface corosion near a water port, then assemble it.

 

 

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 Post subject: Re: DIY headwork
Posted: Tue Sep 08, 2009 1:50 pm 
Getting Side Ways
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very nice! thats basically all i have planned for mine also.
nothing crazy, but combined with a mild cam and what not, should be good for a few kw

 

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XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: DIY headwork
Posted: Tue Sep 08, 2009 6:05 pm 
Getting Side Ways
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Ride: 1995 EF Fairmont

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Nice work on the 94ab head there cjh :wink:

What did you use to polish the chambers? They came up quite nice, im trying to get that finish on the 91aa head im doing to try and prevent the carbon build up a bit..

 

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 Post subject: Re: DIY headwork
Posted: Wed Sep 09, 2009 6:31 pm 
Tyre Shredder
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Ride: Ford Falcon XG

Location: Bendigo
VIC, Australia

cjh the head looks mint.looking at doing the same aswell where did you pick the head up out of interest?
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 Post subject: Re: DIY headwork
Posted: Wed Sep 09, 2009 7:43 pm 
Getting Side Ways
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Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

I've had several heads over the years, picked them up off people, get them overhauled, use them as exchange units when I do their head gaskets......makes the job a lot quicker,.... head off, clean the block, put rebuilt head on......done in a day.
I used a Dremel, with sanding disc's ( backed up with ice cream container lids punched to size ), then polish with a calico buff in a drill with polishing compound.

 

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 Post subject: Re: DIY headwork
Posted: Sat Sep 12, 2009 4:59 pm 
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Ride: EF Fairmont Station Wagon.

Power: 150 rwkw

Location: Mandurah
WA, Australia

Hey misk _one, Got some pics of when I port matched my head, I dowelled the head to position the manifold and gasket the same each time, then picked the larger openings which were on the manifold to match the gasket to first, then painted the inside edge of the gasket with ceiling white paint to make sure I wasnt taking out any more material than needed when matching the head to the gasket, I did this process about three times going back and forth between the manifold and head each time removing less and less until the gasket matched both spot on, keep coating the edge of the gasket with paint each time you swap from head to manifold/manifold to head.

 

 

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4.0L EF Fairmont Station Wagon. EL GT Snorkel. K&N Pod in air box. 3" Intake piping.
Home port job. 1636 Wade cam. Wildcat Extractors, 2 1/2" cat and exhaust.
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 Post subject: Re: DIY headwork
Posted: Sun Nov 07, 2010 9:31 am 
Oompa Loompa
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Location: renmark
SA, Australia

hi, polishing the chambersis a good idea , as some one said it helps in preventing carbon build up.

also its not a real good idea to polish the runners , just leave them in a sanded finish, as if you polish them it can " puddle " the fuel, and the sanded finish helps in breaking up the fuel.

mark
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 Post subject: Re: DIY headwork
Posted: Sun Nov 07, 2010 8:45 pm 
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Polish the exhaust runners but never the intake.

 

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 Post subject: Re: DIY headwork
Posted: Sun Nov 07, 2010 9:13 pm 
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Age: 49

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Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

The head currently on my ED is an EA 3.9 head...fully polished and ported....chambers, intake runners & exhaust runners....still using a standard, untouched EA cam, still like standard compression ratio too ( didn't shave the crap out of the head ) and using an ACL Monotorque head gasket.
I'm currently getting 330km on 50 litres, all town driving ( 70km and less ), and I don't baby it either.
Results speak for themselves...... http://www.youtube.com/watch?v=jJTh9F3Vgg0

 

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