Porting

[94redcivic]

Next weekend I’m going to be porting my head.
It’s a 94 Honda Civic CX with the 1.5L engine. My friend, who has done this numerous times, suggested I try to find any information on where and how much material we should remove.
Does anyone know where I can get information on this or does anyone have any suggestions.
My goal is to make more power but not sacrifice streetability.

Thanks


Chuck

[alexb]

I am sure one of the Hada weasels or our token weasel, Adam,can fill you in on this once they notice the post.

[Moose]

I just recently ported a Honda 1.6L head (D16Z6) ... and this is what I have learnt ...

-Honda heads flow very well in stock form ... thus require litttle work to optimise them .... Basically less is more ...

-Clean and remove all carbon buildup

-Smooth out the casting marks in the ports

-Port match the head to the intake manifold and exhaust manifold

-Run a 80 grit flap wheel in intake ports leaving a nice 80 grit finish

-Take the exhaust ports to a 120 grit finish

-Clean up the bowl area, smoothing the transision between the bowl and the port and leave a nice smoth surface

-Leave the combustion chamber alone if you are keeping the motor mild ... at the most "knock" the sharp edges off any casting /machining lips to minimise the hot-spots

-Do not touch the "floor" of the intake port anywhere near the curve into the combustion chamber ... this shape is vital to good flow and Honda gets it right 99% of the time

-Do a 3 angle valve job, and make sure the head gasket mating surface is straight and true

Here is a couple of good sites for more info

Good general info
http://www.sa-motorsports.com/diyport.htm

Honda specific (D16)
http://www.theoldone.com/articles/d16a_head/

I really good article on porting theory amd different techniques
http://www.hondalife.com/articles/headtech.htm

Cheers

Moose

[94redcivic]

Thanks Moose! That’s exactly the kind of info I was looking for!