Want to do a mild street port job on a "B" intake. What tool will work best to cut the carb mounting base from 4 holes to two ovals? Just trying to grind it away with a Die grinder doesn't seem efficient. Thanks..

Paul

I used a cutoff wheel and a air hacksaw to cut out most of the materal, then cleaned it up with a die grinder.

Glen Henderson



Freedom is not Free

Letohatchee, AL

x2 on the cutoff wheel.


Lawrenceville, GA

I have done several using an electric die grinder and 3/8" straight tungsten carbide tip. Grind stones are much slower rotary files are useless. The hack saw does make the center material go away faster. Once you get the oval shape be sure to radius the sharp edges into the roof of the runners. Then reach down into the down sloping runner and increase the size of the passage entering the left and right lower passages. There is a real pinch point here. Save the metal shavings and mix them with an Epoxy glue to fill the flange face. Be careful of the chips which are small and sharp, eye protection is essential.

Doug T

The Highlands, Louisville, Ky.

Thanks to all that replied.. Doug, I'm not quite sure what you mean when you say to "fill the flange face?" Are you referring to the rough vertical cut areas?

Paul

Paul,

      He's refering to the carb pad. The area that is relieved in the casting around the carb entry holes. Make sure you file that flat when you're done so the carb will seal.

Frank/Rebop

Bristol, In ( by Elkhart) 

It ends up looking like this when the holes and slots are cut - the "air gap" of the original gasket face is interupted.

In some cases, guys have simply milled them flat.

 
 Steve Metzger       Tucson, Arizona

Thanks Frank & Steve. I should have pulled the intake down off the shelf & looked at it again, before asking the last question. Some how I got a picture in my mind (such as it is!) that the surface was flat...

Paul

Some of the B intakes do have a flat surface, maybe truck and full size cars?

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Bill, I suspect different castings are early versus late production stuff. I have one here with no firing order on it. It's early............i think.

b

Frank/Rebop

Bristol, In ( by Elkhart)