CactusJacked
Full Access Member
Interested to see if it makes any kind of difference. I don't spose you dyno tested yours before you started?
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Interested to see if it makes any kind of difference. I don't spose you dyno tested yours before you started?
It's a 65mm opening at the rear I didn't really check it before starting I want to say 62mm.
I just started grinding till I got it where I wanted it. I think fastman bores his out to 65mm but if I'm not mistaking his are CNC machined. I didn't want to take it any further by hand, it would be to easy to mess up.
The 4,7 was actually easier to get larger. 67.5 intake side 68 exit.
Porting is increasing (enlarging) the diameter of an opening, and/or reshaping it. The process is also used to modify the intake and exhaust passages (ports) to increase flow, or make flow more efficient.
Used to do it a lot of Intakes and heads, for example there would be a mismatch between the two so would clean out, smooth out the extra metal to have a easier flow of air and gas. Used to spend many a night in the shop matching everything up.
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You already know:happy175::happy175:
And my bones are still coldSHOCKED.gif:flamethrower:
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Looks like you got a bit more than here in Frederick. Only about 3ish here. Did the drive around 7AM. Going out to start the fleet up now. was 5 at 7AM now it's a balmy 12. :gr_grin:
My hubby is outside now struggling with the riding mower (with plow) - idiot forgot that maybe he should have started and ran it over the weekend with the cold we've been having. Now he's got a 60 watt bulb warming the crankcase while the battery charges and the starter cools off.
Hehehehehe...I'm inside, doing my homework, nice and warm :icon_twisted: