Hi-comp Piston

[JBOMBR]

FOR RACING MX WHAT WILL BE BETTER 12.5:1 PISTON
OR A 440 w/ 10:1 PISTON
ANY PROBLEMS w/ 12.5:1 OTHER THAN FUEL?

[Dunesurfer]

A 440 with 12.5:1:D

[cals400ex]

Originally posted by JBOMBR
FOR RACING MX WHAT WILL BE BETTER 12.5:1 PISTON
OR A 440 w/ 10:1 PISTON
ANY PROBLEMS w/ 12.5:1 OTHER THAN FUEL?


you will want to get the heavy duty studs and a new rod if it was me.

[JBOMBR]

WITH THE 12.5 : 1 WILL IT WRECK THE STOCK ROD?
OR STRIP THE STUDS I KNOW BLOWN OUT HEAD GASKETS ARE A PROBLEM BUT I THINK THAT IS ALL THE MOTOR IS STILL TO NEW FOR ME TO JUSTIFY SLEEVING WHAT DO YOU THINK?

Go with a 11.5:1 if you want it to be simi reliable..:eek2: 12.5:1 will need $300 more dollers in parts to keep the top of the motor together..:eek: LOL

[JBOMBR]

11.5: 1 RACE GAS OR 94 OCTANE

I WILL PROBABLY RUN THAT PISTON W/ HOT CAM STAGE 2
UNTILL I GO W/ A REBORE

ANY OTHER HP MODS TO THE GUTS TO GET MORE POWER/SNAP?