cyman

thank you for the prompt and comprehensive answers and solutions to my problem. the real problem is that this is a custom crankshaft(builder no longer offer it) made from a famous builder, in australia and then shipped to my country. so its a an rb26 stroker (2.9L) using an rb30 crankshaft. so first we have to remake the used crankshaft(i think the crankshaft is destroked and and with smaller counterweights). Machine shop will have to measure and replicate the crankshaft. in deed this rb storker was pushing like 900whp on an ati vibration dampener but we were unaware(naive) that the age of the dampener does matter(it was 10 years old when we first bought it, and used it as it seems to be good at the time of the build) also we used oem bolt and torque specs of that of an rb30. Buy the time we increased the power, soon enough we had this issue. so to summarise it up, we need: an aftermarket balancer that will have very tight fit like Ross, after market timing gear like the Ross or RPR Nitto keyways Do you think that using ARP crankbolt is good to be used just to be on the safe side? thank you.

hello, sorry to revive an old thread. Did you actually fix the issue ? I and my friend are having a similar problem, trying to find a solution to the loose vibration dampener. it actually destroyed the key. do you thing is fixable? its an rb30 crankshaft into an rb26 block