Handy930

Does anyone have wear limit specs for a 79' 930 Need the taper and roundness and piston clearance limits. Thanks for any and all help.

Bernie930

NO more than 0.004" on the barrell's, if there is no evidence of detonation on the pistons, usually the ring lands are worn, make sure you measure those with new rings.
Bernie

Handy930

Bernie, are you saying .004 taper and .004 roundness? Thanks for the help.

Bernie930

Both

Handy930

Thanks again, I thought I remembered the manual saying .0015 on roundness and .003 on taper. I don't have my manual with me and looking at some used cylinders that are within the .004 spec.

e170drvr

I am in the planning stage for my rebuild. Are the stock 930 p+cs typically reusable? The only upgrades I am planning are sc cams and arp hardware and running at 1 bar. Would be interested to see how many have been able to reuse. Would love to be able to save that expense.
Eric

A930Rocket

It all depends on wear, tear, mileage, etc. If you do buy new, you should upgrade to the fully finned P&C's.