Degree numbers alright?

[powerking]

...Ok bear with me..this was my first time with the wheel..These are the numbers I came up with on my 028, keep in mind, this was a used jug and the only port work that I did to it was, widen the exhasut port and flatten out the intake floor, transfers were untouched, the base gasket was removed and squish is at .023. the wheel i used was the one that I printed off of one of the posts.
Do these numbers look ok? The issue I was having was no bottom end torque. My compression is 165 cold

Ex open 112*
Dur 136*

In Open 117*
Dur 126*

Tr open 125*
Dur 110*

 

[gink595]

Those number don't look right. Exhaust looks really low, intake waaaay to high but the transfers look pretty close. I would think exhaust would be around 100*-105*, intake around 70-75* and transfers around 120-125*.

 

[powerking]

Gink...could it be because I tossed the base gasket to tighten the squish? Only thing I did to the exhaust was widen it, and the intake I just flattened out the floor

 

[mdavlee]

If the intake duration is 126° then it's 63°. Which seems a bit low. The exhaust is a lot lower than I've seen out of any saw.

 

[powerking]

Good Christ!! I hope I'm reading it right....I checked it 3 times!!LOL...Would make sense that I need to raise the exhaust to compensate for the no base gasket no?

 

[powerking]

Wouldnt intake duration be 126*?
117x2 - 360 = 126 ?

 

[mdavlee]

Most of us read the intake the other way and whatever it is you double it and thats it. Most saws are around 95-105° exhaust, 70-80° intake and the transfers usually are anywhere from 14-25° blowdown which is the difference between the exhaust opening and transfer opening. A 372 is around 102° exhaust for a duration of 156°. The intake is normally 74° or 148°. The transfers are 124° for a duration of 112°. I just used that for an example since it's one I could remember.

Lowering the jug and flattening out the intake floor should add to the timing not take away. It will lower the exhaust which helps torque and compression a little.