Stage 1 Porting

[Paul Workman]

Originally Posted by Topfuel

When porting aluminum ... Soap seams to work better for me. ATF or WD-40 adds oil to the pores of the aluminum and if you have to weld on the Aluminum afterwards the oil will mess up the welding just my .02 worth

Keep the slightly rough surface on the ports helps keep the boundary layer smaller on the air flow.

"Oil messing up the welding"... NOW he tells me/us! (spent "a little" on welding myself!)

Thanks for that input. I tried a little sample of a water-based cutting liquid - seemed to work OK. But, it was just a sample that soon ran out and the WD-40 was handy and seems to work just as well. I'm well aware of the aluminum porosity, but never thought much about oils like WD-40 penetrating the pores - leading to issues when welding (heads especially).

Well...That tip is worth the Arty Johnson "Veddy Intorestink" award!



P.