NorcalFlyingsquirrel
Well-Known OPE Member
- Local time
- 5:35 AM
- User ID
- 4565
- Joined
- Nov 10, 2017
- Messages
- 90
- Reaction score
- 125
- Location
- Santa Cruz Mountains
Hello, been lurking and reading, grinding and testing, wanted to run a porting plan by you guys before I f up a very nice cylinder. Built a ghetto squish cutter (file tail in a groove on an old cylinder) and cut the base on a belt sander, got .015 tapering to .020 on the inside squish band.
Currently
In 80, top ring covered at bdc
Ex 104
Trans 136 or 32 deg blowdown
Planning on ex back to 100, widen and polish, matched and internally ported muffler with west coast outlet after screen.
80 intake, square up and widen to skirt -.05
25 degrees blowdown with staggered 1-2* side to side, and in to ex, per mcdalvee Hillbilly Grinder, intake side 5 or 6* up and ex side flattish. hope to have enough room to put some curve in the back.
Qs any reason to leave the exhaust low for torque, i hate to give up displacement, and any reason to leave the intake narrow for velocity?
Ps this is my step up removal saw after the 2511. 16" bar w full chisel. Will tweak timing once done.
Thanks for your time and experience,
G
Currently
In 80, top ring covered at bdc
Ex 104
Trans 136 or 32 deg blowdown
Planning on ex back to 100, widen and polish, matched and internally ported muffler with west coast outlet after screen.
80 intake, square up and widen to skirt -.05
25 degrees blowdown with staggered 1-2* side to side, and in to ex, per mcdalvee Hillbilly Grinder, intake side 5 or 6* up and ex side flattish. hope to have enough room to put some curve in the back.
Qs any reason to leave the exhaust low for torque, i hate to give up displacement, and any reason to leave the intake narrow for velocity?
Ps this is my step up removal saw after the 2511. 16" bar w full chisel. Will tweak timing once done.
Thanks for your time and experience,
G