372XP free bee

[jra1100]

Great thread, very interesting. JR

 

[tlandrum]

brads right,theres really no way that your only at 152 if youve raised the exhaust any at all. you need to nail down your numbers before you do something that your saw wont like...

 

[Chesterewers]

degrees

brads right,theres really no way that your only at 152 if youve raised the exhaust any at all. you need to nail down your numbers before you do something that your saw wont like...

Okay, here is what I do, I turn the degree wheel counterclock wise until I start to see the piston crack open zero the wheel then rotate counterclockwise until piston reaches the same spot almost closed. just did it again and reads 152,

 

[blsnelling]

I recomment you zero your wheel at TDC and find the actual port timing.

 

[Chesterewers]

Okay, here is what I do, I turn the degree wheel counterclock wise until I start to see the piston crack open zero the wheel then rotate counterclockwise until piston reaches the same spot almost closed. just did it again and reads 152,

if I do it the opposite way clockwise I get 164 degrees maybe that is the number we are looking for.

 

[blsnelling]

if I do it the opposite way clockwise I get 164 degrees maybe that is the number we are looking for.

Should be 168 if the other way is 152.

 

[Chesterewers]

if I do it the opposite way clockwise I get 164 degrees maybe that is the number we are looking for.

are we looking for the duration closed or open ex? Closed duration is 164 degrees and open is 152 degrees

 

[tlandrum]

your looking for the open duration,but if your not getting the same number both ways your not getting a correct reading. your not at tdc if its not the smae both ways

 

[Chesterewers]

exceptable?

Should be 168 if the other way is 152.

Okay thats about what it is, sound alright or a little too much?

 

[blsnelling]

Something's still not right. Zero your wheel at TDC and make sure you get the same reading both BTDC and ATDC.

 

[Chesterewers]

tdc

Something's still not right. Zero your wheel at TDC and make sure you get the same reading both BTDC and ATDC.

I know how to find tdc but after that I don't know where to stop with the degree wheel to take a measurement

 

[blsnelling]

I know how to find tdc but after that I don't know where to stop with the degree wheel to take a measurement

Right where the exhaust starts to open.

 

[Chesterewers]

measure

Right where the exhaust starts to open.

I get 105 what number is acceptable?

 

[blsnelling]

I get 105 what number is acceptable?

Did you get the same reading from both sides of TDC?

 

[Chesterewers]

reading

Did you get the same reading from both sides of TDC?

yes same reading both sides

 

[blsnelling]

I don't know what to say. I've never seen a 372 that low, even after you've raised it. I guess it is what it is.

 

[Chesterewers]

interesting

I don't know what to say. I've never seen a 372 that low, even after you've raised it. I guess it is what it is.

interesting, well think thats a good thing?

 

[blsnelling]

interesting, well think thats a good thing?

Where are you transfers?

 

[Chesterewers]

hmm

raised it but no base gasket maybe its a mold imperfection on the casting

 

[blsnelling]

raised it but no base gasket maybe its a mold imperfection on the casting

Base gasket only gave you about 1.5°.