M20 Bore Size

[M5W]

Has anyone hear bored out their block to 86mm and if so any results or issues from it ?

[nando]

yes, lots. and no issues.

[M5W]

k cause after reading about dan's issues on a stock bore im worried ill be testing the wall thickness of my bores since I wanna push around 400-450 out of it.

[nando]

Dan Pinder? what problem did he had? he seems to like to learn things the hard way. only problem I know is his motor blew due to an unexpected lean condition at 20psi.

[M5W]

Ya but that lean condition cracked his block I believe and caused it to hydrolock. He had a stock block thickness, I will have 2mm less.

http://www.e30tech.com/forum/showpost.php?p=906349&postcount=31

I know it was caused by a lean condition, Im going to have my megasquirt checked out before I start tuning on this turbo setup.

[nando]

that was a pretty catastrophic failure, the thickness of the block wasn't going to make any difference. He was also running a really high pressure ratio and pushing his turbo to the limits (that means high exhaust pressure too).