saw porting

[mixedangased]

Same handy work me thinks !

 

looks just like the one i did today

will take a pic tomorrow

[mixedangased]

It really has to be the whole powerhead as you need to tune the carb and make sure the fuel sytem etc is set up to deliver the fuel needed!

 

ok, thats no problem.

whats the rough costing ?pm if you want.

also have a 3120 that could be done aswell.,

stripped 1 saw today that has an ex rattle and on inspection against my other 1.

1 has after market barrel and piston i think and the other a mahle, the after market has bigger in/ex ports but the finish isnt so good,so gonna have a go at cleaning that one up.wont mess with the port sizing piston side tho.

[wyk]

Just remember that until ya get a handle on porting, that less is more. Knocking off the coating on the top of the exhaust and the bottom of the intake will get ya some improved timing. Depending on the model, some folks do not even add exhaust timing at all. All saws can use upper transfer fiddling, but make sure you know what yer doing. Some saws make great gains with tiny mods. You'll usually see a 25% improvement on cutting times with a simple muffler mod and touching up the insides a bit and adding more fuel.

 

This is may last project, a 77cc BB top end on a 2165/AKA 365. Intake is at 159(this model BB has a wide intake tract and is fine at lower intake timing even modded), exhaust is at 163(it is running a pop up piston at 200psi ish), transfers at 21* and heavily modded, zama carb, with an 18 B&C running chain with very low rakers in maple wood - excuse the lack of shorts:

 

[ame]

[/ame] Edited January 8, 2014 by wyk

[peckerwoo]

Timeout for a sec: Best thread on AT! (Even though i understand about 5% of it?)

Rock on men

[mixedangased]

Just remember that until ya get a handle on porting, that less is more. Knocking off the coating on the top of the exhaust and the bottom of the intake will get ya some improved timing. Depending on the model, some folks do not even add exhaust timing at all. All saws can use upper transfer fiddling, but make sure you know what yer doing. Some saws make great gains with tiny mods. You'll usually see a 25% improvement on cutting times with a simple muffler mod and touching up the insides a bit and adding more fuel.

 

This is may last project, a 77cc BB top end on a 2165/AKA 365. Intake is at 159(this model BB has a wide intake tract and is fine at lower intake timing even modded), exhaust is at 163(it is running a pop up piston at 200psi ish), transfers at 21* and heavily modded, zama carb, with an 18 B&C running chain with very low rakers in maple wood - excuse the lack of shorts:

 

 

i likie

[wyk]

Well, 18" on a ported 77cc saw is a bit cheating, really. Same maple trunk, 22" bar, 8 pin sprocket.

 

[ame=http://www.youtube.com/watch?v=5M6uDs4jT0I]Ported Jonsered 2165 BB 22" bar - YouTube[/ame]

 

Unfortunately, at the end of that video, I found some metal in the face of that trunk.

Edited January 8, 2014 by wyk

[mixedangased]

well i played with the saw, what a differance,slight porting the in/ex ports but didnt alter the hole in the barrell to piston,cleaned up transfer ports and holes in piston,altered exhaust intake size and gasket to match barrel,enlarged air filter intake and inlet manifold and matched gaskets.cut ex open and removed outlet pipe with baffle.added new outlet pipes 2 of,tweaked carb and cheched plug after a tank full.what a little ripper :thumbup:will wake the dead tho

ripped through some beech more grunt better responce and now singing

[wildflowerbill]

This is it in action - excuse the shorts:lol:

 

 

bloody hell that 254 screams.