Bimotion porting program

[WaveDemon]

who's got a copy they can send me?

 

[adet16v]

i got one, ill send it out now, sorry forgot earlier

 

[tom21]

The piston edge at dead bottom was not at or below the bottom of the exhaust port??


What about the transfers?

EDIT: With the piston at TDC, place a straightedge over the cylinder and tell me if the crown of the piston is touching the straight edge, and if not, how far below the straight edge it is.

No it wasn't- and I know for a fact this is the first time this motor has been opened. its still bone stock and all original.

sure thing- I will get it tonite and post it.

 

[Matt_E]

I have trouble visualizing things without looking straight at it.
The piston crown at BDC should coincide with the bottoms of all transfer port windows.
What you stated would imply the exhaust port window's bottom is below the transfer port bottoms.
I'll have a look tonight.

 

[#ZERO]

Yes… the exhaust port is lower than the piston at BDC

This helps with exhaust reversion, keeping the negative pressure wave from coming back into the cylinder.

 

[tom21]

The piston edge at dead bottom was not at or below the bottom of the exhaust port??

What about the transfers?

EDIT: With the piston at TDC, place a straightedge over the cylinder and tell me if the crown of the piston is touching the straight edge, and if not, how far below the straight edge it is.

at top dead center the crown was over the cylinder and the edge is .013" bleow it. rough gues the crown is 1/4" or so above the cyl. I used feeler gauges and my finger to measure so its not perfect but I did it on the run so sorry bout that.

 

[lyonstail]

does anyone still have a copy of this, or the newer version

cheers seth