I'm trying to port match my intake to my heads, and all I have at my disposal are a Dremel or a pneumatic die grinder.

Using your standard Home Depot stones, I'll be an old man before I'm done. Not only are they slow, but they load up with aluminum so quickly they don't do much good.

I've looked at Harbor Freight, etc, for carbide burrs, but must not be searching under the right terms.

What do folks recommend for this task?

Thanks,
Dave

go here for a selection of burrs
http://www.carbidebur.com/shapes/burs.htm
also seen burrs at sears aswell

Excellent, thanks for the pointer!

I use Standard Abrasives Porting Kit and Block Cleaning kit with a pnuematic die grinder. Dip your carbide cutters in trans oil and they will not load up as quickly, and clean a lot easier.


Larger Dave

Make sure you are using a carbide for aluminum. They are specific for aluminum with bigger flutes.

This place has the best prices on Carbide Burrs and they are close to my house!

http://www.boggstool.com/

They MADE me a 6" shank 3/8" cylindrical ball burr for $13.50!!!!!

Super nice guy that owns the place.

Investigate tool speeds needed. I forget the rpm's right now but the 20,000 rpm air die grinders are way too fast for port work according to the experts. I think 8 or 10,000 was what was needed.
Du-More electric grinder motors was one brand recommended for port work but pretty expensive.

Whenever cutting, drilling, machining Al kerosene is used as a 'cutting oil'

I have no problem using grinders 20,000 and over. I use one that is 60,000. As Larger Dave and Steptoe pointed out, trans oil or kerosene work excellent to cool the burrs and help eliminate clogging. I also use tapmagic brand tapping fluid. I'm reluctant to use any abrasive on aluminum. First, its not safe to use abrasive on anything that does not make a spark, and the abrasive gets imbedded in the aluminum and some of it can dislodge and be run through your engine. my .02. Kevin