Head porting, intake ports finish ?
03-20-2007, 03:05 AM
#1
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Car: C4 Corvette
Engine: l-98
Transmission: 700r4
Head porting, intake ports finish ?
I've read that it's not best solution to have very smooth finish on
intake ports because fuel don't get mixed well with air if it's too
smooth.
How do you finish intake ports?
Using cartridge rolls (standard abrasives) looks very smooth or is
that rough enough?
intake ports because fuel don't get mixed well with air if it's too
smooth.
How do you finish intake ports?
Using cartridge rolls (standard abrasives) looks very smooth or is
that rough enough?
03-20-2007, 11:14 AM
#2
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Re: Head porting, intake ports finish ?
The intake ports should be smooth but not polished. See http://www.sa-motorsports.com/diyport.aspx , Part 2. The 80 grit cartridge roll is the last you use. It's still "rough" compared to the polished finish.
03-20-2007, 11:31 AM
#3
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Re: Head porting, intake ports finish ?
if you want to polish anything do the combustion chamber.
Smooth any sharp edges and polish the hell out of it.
Smooth any sharp edges and polish the hell out of it.
03-20-2007, 12:14 PM
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Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Re: Head porting, intake ports finish ?
Yup, a "wet 80 grit finish" is what you want, got it confirmed years back by a guy who used to work with F1 cars.
03-20-2007, 06:30 PM
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Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: Head porting, intake ports finish ?
not that it was asked, but exhaust ports are like the combustion chambers, polish to a mirror shine.
Good luck with it.
Good luck with it.
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