Intake Porters-What grit paper do you finish with?

I'm porting my Victor and wondering what the best grit to finish with would be. 60 grit seems about right to maintain some atomization but I have 120 grit also. I think the 120 is too smooth but wanted some opinions.

60 grit or 80 grit will be just fine.

Charlie

That really depends upon your talent and how good your cutter finish is.
60 grit is USUALLY a rough enough finish to stimulate the boundry layer attached to the walls during air/fuel flowing. The smoother the better IF there is NO fuel as on a lot of F.I. uppers.

512Fairlane wrote:I'm porting my Victor and wondering what the best grit to finish with would be. 60 grit seems about right to maintain some atomization but I have 120 grit also. I think the 120 is too smooth but wanted some opinions.

I'd like to chime in here like I have any idea about porting anything! The word atomization says it all. With atomization included, there must be a liquid of sorts passing through the area to be worked (port). I will certainly agree with both Charlie and Randy as to the finish of the walls and floors of a port with liquid and air occupying that area, it just makes sense! When the process of forcing an abrasive substance through a port seemed at first the greatest thing since sliced bread until it was found the liquid mixed with air was hitting the walls, roof or floor and disappeared from the efficiency equation! As Randy mentions, when air only is passed through a port it seems a "slick finish" is OK. Otherwise it doesn't seem to work as well.

I must concur with the Master Porters, and maybe a master-bater or two, scuff her up, she will like you better the next morning!

Just more B.S.,
Dave.