Finishing touches to head porting...

[Paul Workman]

It's been a while since my head porting project started - punching a hole in the water jacket took a while to fix - but now it's time to clean up the area around the valve guides and put in some of the FBI's finishing touches.

With a relatively pointed burr, I was able to get right next to the guide and remove the little "bump" - the radius left by a larger diameter tool - and with a drum and flap sander on a Dremel, I am pleased with the results: Smooth transition around the guides - actually little or NO transition at all.

I love my pneumatic Snap-On die grinder with the extended snout. I have several others, but next to the Snap, the others are like a "bull in a China shop"!! I love the way I could just turn it on to a slow rpm for next to the guide work and gentle shaping and cleanup, and then instantly rev it up to high speed to gently wipe the radius of the bore with the straight side of the burr to clean up the ripples before sanding with the roll sanders again. With the air hose over my shoulder and my middle finger under the air leaver to regulate the travel and my index finger running the "throttle" and the combo of a fine - fluted burr, the setup really becomes a precision instrument, IMO. Some like (or think the do) the electric DGs. But, I'd be interested to get their opinion after trying a quality pneumatic.

Pix later!

P.