home porting my heads!!!!

i just bought my heads(351W) to put on my 302 and looked at the exhaust ports and noticed that they looked kinda small... so i put the gasket up to them and sure enough they could use a trim. i'll be doing this tomorrow, but one thing that i want to know is if 34000 rpm is too much with the die grinder for the job...??

Jace

seems like a good rpm.
Is that what the die grinder is rated for?
IE check the instructions for amount of PSI required for the maximum RPM.
Also with a die grinder make sure you choose your bits wisely! A more aggressive bit and you will chew up head material.
When you match the gaskets measure twice and cut once! Also use a color die to show you what your cutting.

Run that thing at half speed and get a carbide bit, plan on spending a full messy
day. If you have the smog bumps, grind them away.

Billgear nice pics.I have a set of J-code 302 heads that had the smog pump tubes and I wondered how they would clean up,or if you could really port them but it looks like you did a good job.[img]/phpBB/images/smiles/icon_wink.gif[/img]

You'll kill carbide burrs and sanding rolls in no time spinning them 35k rpm.

If the grinder is electric, get a 300W (at least) dimmer switch at the hardware store (or Walmart) and use it to slow the speed down to around 10-12k. If you are using stones, the faster the better... but it will still feel like slow motion compared to a carbide burr. [img]/phpBB/images/smiles/icon_smile.gif[/img]

http://www.sa-motorsports.com/diyport.htm

http://www.sa-motorsports.com/products.shtm

You can order these products from Summit... just call them with the part numbers.

Good Luck!

_________________
Mike Burch, 66 mustang real street
302 4-speed 289 heads, 10.63 @ 129.3
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
http://www.fortunecity.com/silverstone/healey/367

<font size=-1>[ This Message was edited by: n2omike on 10/6/02 9:13pm ]</font>

Make sure you don't go bigger on the ports than your header tube dimensions. I recently found out that one particular head, a GT40P in fact, will lose a little flow if the top of the header pipe is too close to the top of the port. Seems it likes about 1/8" step from the port opening to the top of the header pipe. But thats just one head design. Yours may not apply.