Originally Posted by
killerkoolaid
Ya I could imagin how bad it was. He couldn't find the tune at the time before sending it out to you. The other motor that needed a repinch we used some local guy that most of the guys out by us use. But the fact that you repolished the sleeve and head imo a best way of doing things. I come from the automotive world and with the service you provided him I'm truly impressed. Now for the real test this weekend..
What measuring tools do you think we could use to find the gap. I know I have a Mic that will do .0001 of an inch. But I don't think I have anything that will fit the hole of the con rod
Its good to use the local guys that are tooled by RayAracing. They could use the experience, with you getting a quick turn around on the service.
The clean polished well detailed apparence in my work is resizing over clean/fresh surfaces to achieves the best accuracy. Deburing piston top edge and around porting windows secondary objective.
You can use the mics you described to check crank pin wear. I use vinier type blade mics. Reference 0.197" (5.00mm) original size Werks B5 and most other .21 engine models. None the less, the crank pin will show an egg shaped wear pattern, and which ever the high reading indicates a close enough to determine the stock diameter. As for the conrod bushing inside mics work best, along with check pins I also have and use for inspections. Anything over 0.003" low crank pin measurement (0.194") compounded with equal conrod bushing wear results the beginning performance issues. I offer conrod bushing and crank pin inspection free to the guys with all they need to do is bag crank shaft with piston(conrod attached)and sleeve in package. BEST to just get a visual from back plate opening , wiping crank pin-conrod bushing oil free, and simply rocking flywheel back + forth feeling backlash. If not excessive nothing to be concerned with. Hope this helps
