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A few things to consider if you end up doing this: A longer shaft will reduce the speed that you can safely spin the turbos up to It's got to do with something engineers call rotordynamics, although I highly doubt you would need to spin something up to 125,000 RPM for a turbojet application :) You may also find that the existing journal bearings are not ...


It certainly looks cracked. You could try spraying some EGR cleaner at the crack while the engine is idling. If the EGR cleaner gets sucked in through the cracked pipe, the revs of the engine will change, which will confirm you have an air leak.

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