Wrist pin broke on RWR piston.
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Wrist pin broke on RWR piston.
Originally posted by: crackerJack
It was installed by the local bomb mechanic. I am not sure what he gapped it to and he doesn't remember exactly.
It was installed by the local bomb mechanic. I am not sure what he gapped it to and he doesn't remember exactly.
If he doesn't remember, then I would suspect he didn't do it. It would seem likely he should be able to do a quick calculation in his head and give you an immediate answer.
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#23
Wrist pin broke on RWR piston.
Major, Nice. I guess we are waiting to see how long the hp research piston is going to be. When do you think you will be ready for the piston? How much more do ya think we could take off the top of this piston to bring down the compression?? Could we get it down to 9/1? RWR was worried about thinning the top of the piston out to much more than they did.
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Wrist pin broke on RWR piston.
An important suggestion that nobody has mentioned though you may have thaught of it already. Since the wrist pin broke inside the rod and I'm sure it ran it in this condition, I strongly advise checking the inside of the rod's wrist pin boss for out-of-round after the bushing is out.
When The wrist pin broke it put abnormal lateral loads on the ends and center of the rod boss and may have damaged it. Not necessarily deviation that is visible to the eye but could be substantial enough to cause another wrist pin failure or worse yet, a small end rod failure. The optimistic view will suggest that the bushing absorbed the load and saved the rod from damage. I hope the later is true in this case.
When The wrist pin broke it put abnormal lateral loads on the ends and center of the rod boss and may have damaged it. Not necessarily deviation that is visible to the eye but could be substantial enough to cause another wrist pin failure or worse yet, a small end rod failure. The optimistic view will suggest that the bushing absorbed the load and saved the rod from damage. I hope the later is true in this case.