Ralph, I have taken squish measurements on my:

DA150 - .055
3W150 - .030
3W157 - .015

Now I DO KNOW that my DA150 is an absolute gas hog in that after 18 minutes on a 50 oz. tank I better be lookin for terra firma.

My 3W150 made a deadstick at 27 minutes once on my 50oz tank.

The 157 seems stingy too, but I don't know how stingy.

What exactly are the affects of these vastly different squish measurements? I'm assuming that the port timing is probably close to the same, but I haven't put a degree wheel on them to check. Let's assume the port timing is the same between all 3 motors.

Rich Sornborger