Originally Posted by DaveZ03 (Post 3899898)

Given what the motor is pushing out HP wise, I believe you are right. It seems like he and his folks are playing catch up a little with this platform. I mean he clearly has connections/money to dump into it, but why not take a more measured approach and "measure twice and cut once"?

Originally Posted by Spooler (Post 3899745)

I have read the same. Most I read about were pushing water. Only one way to do that and that is if the sleeve machine work was not done properly. I would suspect headgasket issues from a sleeve dropping. I am still researching this. Just any old machine shop won't do. Darton East had major issues years ago from what I was reading. The machine shop must have a 3 or 4 axis CNC and the tolerances are a thousandth to 1/2 a thousandth. It has to be perfect.

Originally Posted by Irishrogue (Post 3899808)

For what it's worth, I went with 9:1 compression on my rebuild and did 685hp 615 tq on 91 octane at 20 lbs of boost. I don't have the low end problem spooler was talking about, I think that's mostly credit to Seb's tuning abilities with the throttle response. From what Seb explained to me the main limiting factor to running higher boost is the intake manifold.

Originally Posted by Elmo370z (Post 3899902)

HE is a clout chaser. Plus sure his builders want to do their own thing and not listen to anyone