318 head porting for the average joe

When you have shaped your port the best you can, still need more, and you can't port any more due to water risk or roof thickness. .............You go looking for other ideas to make your goal.

I have personally had a port, were the air was so close to jumping of the ssr. You could wave your hand in front of the port. And the flow (cfm) would drop and come back at high lift.

I highly polished that port and lost 20 cfm.

Did nothing to the port but hand sand the ssr with 80 grit sand paper. Got the air to hold back on to the ssr, and go my 20 cfm back. There was NO port shaping just texturing and only on the floor at the ssr and, on the ssr


I'm no Pro Porter just a average joe! sharing my experience:cheers: