Quote:
Originally Posted by Rich Biebel
Todd I don't know the exact reason for your engine failure but I would not change what has worked successfully for many years.
I have no idea why a piston company would change to something different.....
I've used spiral locks as I said for many years and the pins don't have a lot of movement side to side between the locks. Never had one come out....
I always make sure the pin is free to move back and forth between the locks after assembly and use a heavier type assembly oil on the pins and pistons....
Round wire locks might work fine but you won't find them in my engine. Now that I know these are out there I would make sure any pistons I buy have Spiral lock grooves and locks.....or I'm not buying them...
My dragster engine is a 565 and has Diamond pistons with spiral locks....I built it......It's 6 years old and has hundreds of runs on it.....and has been apart for inspection and some fresh parts.
I built engines for myself and many others for years and years......
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Rich, I agree with everything you've said. Why the piston manufacturers have gone to a round wire lock I can't comment on, I just don't know. What I do know is a round wire lock will not work if the piston manufacturer doesn't machine the groove properly. Not sure if the same applies to a spirolox groove or that type of lock is more forgiving to machining discrepancies.