9412tsi
Proven Member
- 53
- 2
- Dec 1, 2014
-
pittsburgh,
Pennsylvania
So my machine shop called me telling they are almost done with all machine work. I had him figure out the compression ratio so we can figure out what size gasket to use. Im gonna be running o-ring setup with copper hg. He said he did the math its coming out with a 11.5 compression ratio. He took .004" of block and same of the head. being this engine only had 35k miles and it never looked like it was apart, im assuming this is the first time it was machined.Why is the ratio so high?you would think wiseco would be a lot closer?Also he said the pistons will be sticking out .010" over the deck. He said we are gonna have to use a .085" ish gasket to get 10.5:1.
so my questions:
is this normal for them to be off by a whole point?i was expecting .2-.3 over or under.
can I get away with 11.0:-11.5:1 on e85? I know tuning will be the key here.basicly, will that high of compression limit me?
I m just wondering what the mls guys are doing when using these pistons.
thanks in advance...
so my questions:
is this normal for them to be off by a whole point?i was expecting .2-.3 over or under.
can I get away with 11.0:-11.5:1 on e85? I know tuning will be the key here.basicly, will that high of compression limit me?
I m just wondering what the mls guys are doing when using these pistons.
thanks in advance...