how long will a fully built and sleeved h22 last running 20lb of boost? I change the oil more often than I'm willing to post, lol and replace spark plugs every 500 miles. I study and analyze everything I can, I have motor oil from 100 miles of use, to 1000 miles of use in 100 mile increments and am currently sending off to Blackstone for analysis. how many miles should a fully built h22 last under 20lb of boost while taken care of by Rainman? lol!!

 

Nobody can say. There are so many variables. Boost pressure is irrelevant. Just do the maintenance on it and make sure it's tuned properly.