View Single Post
Old 02-06-2013, 02:56 PM   #111
Beastly Adventurer
Joined: Oct 2004
Location: Anchorage, formerly Spenard (hub of the universe)
Oddometer: 5,879
is the head back on yet? did we talk about cleaning up the ports?

the exhaust looks like this

even a crude clean up helps

heres the intake.... the idea is to fair the area behind the guides so that it has less drag.

also there a couple lumps that can go away in the intake bowls

can be done in a couple hours with hand tools. it's easier with the guides out though. another trick is to use intake guides in the exhaust, either that or taper them to give more area. I've done a half a dozen & don't have pix of one thats is polished, but you get the idea. Theres more to a true porting job... like filling in some spaces as well

also... Eagle Mike has done some dyno stuff & found that moving the exhaust cam 1 tooth advanced gives a small torque boost with no penalties. I intend to try that this spring.
Beezer is offline   Reply With Quote