Cross Piston vs Meteor

[Tomo6400]

S

They come mildly ported, they run stronger than stock OEM, but they benefit from addl porting.

so do you raise the exhaust port again or just widen the ports a we bit ? And I noticed you said the cross pistons have wider skirts I haven’t found that and I put it against a ks piston and a Mahle piston have the changed them mike.?

 

[MustangMike]

Don't know if they changed or not, but that was what I found when I measured.

Almost always some room to widen, but check the # before raising. (Also, compare with your piston skirts before widening)

660s have a longer stroke than 440/460, and seem to like to be around 97 on the Ex (instead of 100-102) like on the other saws.