was just woundering what the difference is between a closed deck block and an open deck block cheers wiggy

 

the search feature is your friend

 

Open Deck.



Semi closed deck.



Closed Deck.

 

good to know this as I've always wondered, which one is the best ?

 

Closed = Stronger

 

Semi-closed deck next to a closed deck.


Then you can have pinned blocks.


You can get new liners for Impreza engines, guy on NASIOC has a rather nice setup just cant find the pics lol.

 

treat advice on nasioc witha peace of string, lol, american tuning is way way different from tuning in the UK

 

at what power level then does a semi closed deck become dangerous out of interest?

 

depends who you ask, its also mroe to do with boost levels rather than specific power, 450 is about the safe level, after that it a bit of luck, some get away with it, some dont.

 

Surely there is cooling issues with a CDB, water jackets aren't as big!? Large radiator?

Thanks
Sam

 

not sure, if it is an issue sure it can be accoutned for in the build

 

cheers for the images makes it much clearer, by any chance would anybody know what type of block a MY97 phase 1.5 turbo 2000 would have in it cheers wiggy.

 

Id suggest an my97 turbo2000 sould be an open deck.

 

cheers if so how much power could i run safly before over stressing it?

 

people have run over 500 bhp on open decks

id say 450 wouldnt be over stressing it as plenty newage imprezas run these power figures , with an older classic engine though albeit the same id say more 350 -400 max as the engine may be tired

 

how many miles on yours wiggy1??

 

shes at 129 thou, but engines away to get skimmed and the block deck as water pump failed and warped eveything

 

You up rating engine internals with forged items?

 

unfortunatly no i cant afford it at the moment, as im having to replace the turbo aswell due to excessive shaft play, and doing the clutch as well while its out as thats also about dead.

 

Thats seriously going to limit you then, as standard internals will be safe around 320ish from what I can gather, and then can be hit and miss, some do more some don`t.


As for NASIOC it was only for some nice tasty pics, every tuning advise you should take with a pinch of salt imho. As anyone can know something cos they were told or have heard, understanding the reasons why and their effects is a whole different ball game.