open or closed?

crappyrice · Post by **crappyrice** » Sun Sep 11, 2005 4:37 am

me have 91 legacy turbo auto, all stock.

is it a open bore or closed bore ?

Post by **DLC** » Sun Sep 11, 2005 7:53 am

It's turbo. All turbo 2.2 blocks are closed deck.

crappyrice · Post by **crappyrice** » Mon Sep 12, 2005 1:39 am

so how much boost can they take, or are our pistons or valves the weak links in this?

Post by **Legacy777** » Mon Sep 12, 2005 2:53 am

In stock form or modified?

Please give some more specifics

crappyrice · Post by **crappyrice** » Mon Sep 12, 2005 2:55 am

well stock uness ur running a moded bore? but then i wouldent be asking, btw our pistons arent forged are they?

Post by **Legacy777** » Mon Sep 12, 2005 2:57 am

I'm not following ya??

No our pistons are not forged.

crappyrice · Post by **crappyrice** » Mon Sep 12, 2005 2:59 am

like on a turbo 91 legacy if the bore is closed then that means it can handle lots of boost, well more than a open bore at least, i just want to knnow the max boost the stocker can handle without blowing up, or becoming un reliable or dangerous

Post by **Legacy777** » Mon Sep 12, 2005 3:06 am

The terminology is not closed or open bore. Closed or open deck is the correct terminology.

In stock form, the turbo is your limiting factor. It will run out of steam before you'll blow the engine. With an intercooler I think guys are running 16 psi. Much more then that, it's not worth it....the turbo can't keep up.

With a larger turbo more is certainly possible. There are race guys running 30 psi on these blocks.....so it's not an issue of whether or not the block can take the boost, it's are you going to spend the money for a turbo, injectors, engine management, etc to do things right.

crappyrice · Post by **crappyrice** » Mon Sep 12, 2005 3:09 am

wow so u can run 30 psi on these blocks? but will the stock pistons and vlaves be able to handle it?

azn2nr · Post by **azn2nr** » Mon Sep 12, 2005 3:21 am

yes the bottom end will be able to handle it. but the heads might not.

read the stickies

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open or closed?

open or closed?