CLASS RACER FORUM - Pontiac intake question

Quote:

Originally Posted by Kevin McClelland (Post 65073)

Floyd, with the Flowmaster mufflers it has nothing to do with back pressure and everything to do with placing the vacu-pan nipple in the muffler. Through many hours of testing on a flow bench and on the engine dyno with a 540 big block the most vacuum we were able to create was 1 inch of mercury! This was a day of testing of different angles cut on the end of tube, location of tube, angle of tube, and all the testing was done in a straight pipe (i.e. collector) not in a muffler.

Sorry guys, didn't mean to take up a Pontiac thread.

Kevin

P.S. Bruce, did you ever get the turn downs you were looking for? One of my tech guys said that he had spoke with you about them. Take care.

Kevin,
I have the Moroso evac kit and placed the nipples in the collector at the angle the instructions showed. i was spraying oil out of the valley front and rear. I figured the manifold was too tight to the block, but I was too lazy to pull it and cut the bottom. Removing the evac tubes and putting a little silicone on the seam between the manifold and block solved the problem. It was a pain wiping down the motor after every pass. It was easy to find my pit though, it was the one marked with oil spots.
Where should I put the nipples and are they really worth having?
Floyd