86.5mm pistons no prob. on sr20det?

[g-man]

I did a quick search didn't find an an answer to my question. If I machine the block on my sr engine to accomodate forged 86.5mm pistons there will be no problems running high boost right? Or will I need to use sleeves? Just asking because the machine shop is not sure about how strong the block will be after machining it to fit these pistons.

[JesusLikesKFC]

an extra .5 should not be a problem. u wont need to get the block sleeved for that.

[redline19]

86.5 shouldn't be a problem. anything over that and you should consider sleeving it. and the higher boost, it should be no problem, maybe invest in a nice 1.1mm apex headgasket or even a 1.5 if you want to lower the compression some more for a higher boost application.

[180fan]

no problem at all. 87mm is a bit of a stretch and should be sleeved. past that, sleeve it.