Will Kraemer
WillBilly
Hey yall,
Been cruising around this forum for a while but finally making a post.
I've got a husky 181se that runs great but I wanted to try my hand at porting. So that I didn't ruin the OEM jug, I bought a Hyway 288 Piston/jug kit and a meteor piston because it is slightly wider (only .030" to .050" if I remember correctly). I've done quite a bit of reading up on porting numbers for this saw and how to port and due to working in a machine shop, I feel that I'm fully capable of it. The porting numbers I currently have are as follows.
Hwy Jug and Meteor Piston with .003" base gasket
Squish @.020"
Ex 168...96atdc
Tr 130...115atdc
In 140...70btdc
BD 19
Hwy Jug and Hwy Piston with .003" base gasket
Squish @.028"
Ex 164...98atdc
Tr 126...117atdc
In 140...70btdc
BD 19
The numbers that scarr posted up somewhere was 99-118-79
In addition, the Hwy piston weighs .5 oz less than the Meteor. about 15-20% lighter.
Would you guys suggest Using the Hwy piston because it gets me close to scarr's porting numbers and less weight even though I wouldn't be able to go as wide with the exhaust port? I was also thinking about lowering the floor of the intake to increase the duration.
Thanks for the help,
-Will
Been cruising around this forum for a while but finally making a post.
I've got a husky 181se that runs great but I wanted to try my hand at porting. So that I didn't ruin the OEM jug, I bought a Hyway 288 Piston/jug kit and a meteor piston because it is slightly wider (only .030" to .050" if I remember correctly). I've done quite a bit of reading up on porting numbers for this saw and how to port and due to working in a machine shop, I feel that I'm fully capable of it. The porting numbers I currently have are as follows.
Hwy Jug and Meteor Piston with .003" base gasket
Squish @.020"
Ex 168...96atdc
Tr 130...115atdc
In 140...70btdc
BD 19
Hwy Jug and Hwy Piston with .003" base gasket
Squish @.028"
Ex 164...98atdc
Tr 126...117atdc
In 140...70btdc
BD 19
The numbers that scarr posted up somewhere was 99-118-79
In addition, the Hwy piston weighs .5 oz less than the Meteor. about 15-20% lighter.
Would you guys suggest Using the Hwy piston because it gets me close to scarr's porting numbers and less weight even though I wouldn't be able to go as wide with the exhaust port? I was also thinking about lowering the floor of the intake to increase the duration.
Thanks for the help,
-Will