Before I start getting into power upgrades, I have been doing some reading. It seems like the weak point on the new engine is the wristpin failing which in turn throws a rod through the block. There seems to be no “fail point” as such power wise. I read even stock is failing but can’t confirm. Some EVOs are running 700 on stock block with no issues.
Some changes to the evo engine are all about efficiency and not power/reliability. Main bearings dropped 6mm (I think I read) in size and one alarming upgrade is the amount or blowby and recirculated oil being pumped back into the engine.
PCV into induction, Blowby into suction side of the turbo, more blowby into inlet within the head. I am sure when new the cyclones do a good job of separating the oil from the air, but this has to increase det risk as things age.
I am still trying to work out how pressure is balanced, and reverse flow is stopped on the high-pressure inlet side. Prob some sort of NRV or flap arrangement.
Seems like I want to rip it all out. I see Oil separation kits online, but I am 99% sure they don’t really address all the issue and prob more of a gimmick (need to confirm)
Really can’t be bothered forging the engine unless I go big turbo. The above may drive a different decision.
Or, is it DET caused by the above that is killing the Wristpin?? Hmmmm.
Edited by paulmc, 22 July 2019 - 12:43 PM.