390xp

[jropo]

Seems to me that if you cut the base to the point where you need to cut squish band, it should make more than stock comp.
Did you take .25 out of the band or the roof of the exh.?


While your in there check yo ring gap.:biggrin:

 

[parrisw]

Seems to me that if you cut the base to the point where you need to cut squish band, it should make more than stock comp.
Did you take .25 out of the band or the roof of the exh.?


While your in there check yo ring gap.:biggrin:

Squish band machined, then base was machined to bring squish back down. Ring gap on a brand new piston and cylinder?

 

[jropo]

Squish band machined, then base was machined to bring squish back down. Ring gap on a brand new piston and cylinder?

Why not.
There is only a few things that kills comp.
Like you said, maybe you got a bad p/c.
I like puzzles, I like to know what is doing what, at what time. If something is wrong I wanna know why.
There has to be a good reason why the comp. is down, I'm simply curious as whats going on.

Who knows maybe your p/c was the last run on a Friday!!!!