Stage 1 Porting

[LGAFF]

Well, I am pressed for time so I can get the snake skinner project on the road sometime soon, so I am doing a "stage 1" Plenum port this time around.

Primary: 36mm for plenum narrowing to 35mm at the fuel injector boss, boss is removed and will taper to 33mm(maybe 34mm)

Secondary: open to 36mm to fuel inj boss. clean up after that(flap)


Going pretty fast, I did 5 IH hole down to the Inj boss in about 2hrs,

So we will see what we get

[Eric870]

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[Eric870]

[QUOTE] "Going pretty fast, I did 5 IH hole down to the Inj boss in about 2hrs,"

Lee will you post a picture of the tools and bits you use? I like to see what you found works best.

[LGAFF]

This one makes it go pretty quick:







I use these to get to harder to reach spots, the long shank I only use on an air compressor driven tool, as at high RPM it whips.

I use a cheap Harbor Freight Grinder and a small air grinder

Finishing is done with a 1" X 1" flap wheel 90 or 120 grit

[LGAFF]

I would not use a large bit on the head, the alum seems softer

[Eric870]

Originally Posted by LGAFF

I would not use a large bit on the head, the alum seems softer

Yes, Aluminum is very soft and gummy. I use a piece of steel to clean the bits when they get gummed up.

[LGAFF]

Not cleaned up yet.....but you get the picture

[Topfuel]

When porting aluminum use bar soap on the bit or use ATF dip bit into one or the other ever so often it really keep the bit from gumming up. 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
By the way looks good that is what I did to mine much much better than stock. Keep the slightly rough surface on the ports helps keep the boundry layer smaller on the air flow.

[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.

[LGAFF]

Still open to doing these

Stage I for $450
Stagr for $700