porting 302 stock heads

[cougit]

any body have a good site for diy porting or some helpfull hints
can I romove the lumps with holes in them in the ex,ports
I have more time then $$
greatfull for any help or hints
thanks

[powerhouse]

you can remove the egr bumps(exhaust port) other than that stick to smoothing and blending in the valve bowls and on the short side radiuses. Do not try to remove to much material. Without the aid of a flowbench or experiance porting the heads it is very easy to remove material in areas that will not help airflow at all, and may actually hurt it. The most important aspect is to find a machinist to do the valve job that has experience with these heads. The correct angles will make or break the airflow potential of the heads. The stock heads when ported as described above, with a good valve job, will flow in the 180-185 cfm range around .450" lift on the intake and 135-140 cfm on the ex. Good luck Andrew

[DogCatcher]

Just for some inputs and what you might expect, performance wise, read what Thumper has to say at www.hunterstyle.com/thumper. I'm using his heads and have been pleased. My experience though suggests that you be careful with rocker and valve spring selections when you change from the stock Mustange HO roller cam.

DogCatcher [img]smile.gif[/img]

[speedracer67]

DogCatcher
Tried to go to hunter web site and came back not found.
Any better address for him?
TIA
Rick

[DogCatcher]

I just tried the address http://www.hunterstyle.com/thumper/ and connected. Perhaps it needs the http:// in front of the www.

HTH Dogcatcher

[mer3000000]

What is meant by "short side radiuses"? Are these the intake and exhaust ports?

[StephenP]

Short side radius is the "inside" of the curve. If you look in the head from the intake side - the inside radius are along the bottom (for the most part)

Most of the time you are smoothing out the inside radius to make a straight shot to the valve.

Hope that helps,

[img]graemlins/grey.gif[/img]

[Tims 88GT]

just go with it, it is pritty hard to mess up a cast iron head, i did the exhaust side of my e7te's because they are so small

[Mark Ames]

What tools are recomended in porting...is a dremel any help in the proceedure?

[powerhouse]

a dremel could possibly work,but it will probably take a while. What you really need is an air or electric die grinder that will hold burs and stones with a 1/4" shank. you can pick one up from a tool vendor(harbor freight,etc.) for under $100. carbide burs and some stones will run about $50-75. If you are going to use a bur or stone with a long shank(over 3") you will need to make a speed control for the grinder(if you use an electric one). a light dimmer work good for this.The longer shanks and high rpm(usually about 24,000) don't mix well. Andrew

[Tims 88GT]

i did mine with a dremel, it took me 2 nights to do boath exhaust side of the heads. and 4 stones

[rkite]

Here is an article on the E7TE (Stock 5.0) heads.
http://www.diyporting.com/

[Stinson Pilot]

Just in case you missed it:

Thread on porting stock heads:

http://www.ffcars.com/cgi-bin/ultima...t/066487.html?

[Steve]

Valako Race heads DVD on porting the E7TE is the best info for the home porter out there. Better than anything else period.

http://hometown.aol.com/valakoraceheads/page11.html
Jim Valako 616-889-0928