my cuz was braggin to me the other day about how he can turbo his car but i cant... he said that because i have a "closed deck" that it prob cant be done... what is a closed deck, and why cant ti be done?

 

not sure but your 2.2 can deff have a turbo system bolted to it.

 

not until the computer is "cracked" so you can run more fuel for forced induction. unless you gut everything and go complete custom standalone management. everything will bolt up to the engine like any other ecotec, but you guys got screwed with a different ecu that no one has bothered to tune yet

btw: dont know what "closed deck" is. might refer to the ecu but ive never heard that term before.

 

so how much $ is that lookin?

 

Your looking at a good 2500-5k for a complete kit, if and when there is tuning and what not ready.

 

Open-deck refers to the design of the block and how the pistons are surrounded by a thin cylinder wall. Closed-deck also refers to the design of the block and how the pistons are surrounded by a thick cylinder wall.

Open-deck (look at the spaces between the cylinder walls and the rest of the block): http://www.mech.northwestern.edu/MFG...up/engine1.gif

Closed-deck (SR20DE in the picture): http://www.customdesignperformance.c...an/image08.jpg


I don't know much about the Ecotecs, hence the reason I just joined, but I saw this post and wanted to offer some knowledge on the subject. Open deck designs are NOT as good as closed-deck designs for boost! Open-deck designs risk the chance of warping the walls with an increase of HP (via mods, like any type of forced induction). Closed-deck designs pretty much eliminate that risk.

So if ecotec's are closed-deck, then they are great for turbocharging/supercharging. Your friend doesn't really know what he's talking about.

 

when your first post is a good one, its like our first impression of your knowledge welcome.

 

woot, i agree... !!! great first post

 

retard nailed it right on the head.


i could get used to saying that LOL


oh and your friend is an idiot.

 

so does ant one know if the 2.2 is open or closed?

 

I think he's talking about "closed loop"

 

closed

 

Ecotec is open deck.

 

what would he be talking about if he was meaning "closed loop"?

 

An Ecotec is a open deck siamesed liner block.


Open deck - Cylinder liners are not an intergral part of the block.
Closed deck - Cylinder liners are an integral part of the block

Open deck blocks arent neccesarly bad. All LS derived engines are Open deck. Aluminum blocks need to have a ductile iron sleeves inserted in them for cylinders. Hence aluminum block engines are open deck.

There is also a thing called a siamesed liner, open deck block.


This is an open deck block, where all 4 cylinder liners are cast as 1 peice. The two red arrows are pointing to where the block has been doweld to locate the liner assembly. (Note: 4 sets along the block. 1 for each cylinder.)

The problem with using an Ecotec engine for high boost applications, is they have a tendancy to float the cylinder liners. This causes the liner to not properly seal to the block and allows coolant from the water jacket to pour into the oil pan. Oil and coolant mixed together does not lubricate very well. One thing that could help with this, is a block guard. However Im not sure if anyone currently makes a block guard at this time. You would always drill the block and dowel pin the liners to hold them in place and prevent deformation of the liner

And tell your friend, under most circumstances a "closed deck block" is the best for high boost/nitrous applications.

 

Your friend is stupid!!!

 

thanks all... thats what i needed to know... ill be rubbin it in his face now...

 

open/semi-closed decks are decent for boost but closed deck designs are better for handling boost. On Subaru's older 2.2L Turbo engines off the older legacys are great for boost. This guy i know pumped 25psi @ 350awhp for awhile b4 the engine recently blew. Open deck engines can be modified to a closed deck design but its more money...but if u gots the moeny u can do nething

 

i know this thread is a bit old BUTTTTT,

if you cant turbo your 2.2...then what the hell are these?:

http://www.tntautosport.com/store/in...x&cPath=1_8_10

Thats right, I see not 1...but 2 turbo kits for the 2.2 cobalt...granted the garrett kit doesnt offer tuning, and is just simply parts...but still.

 

The reason closed deck designs are better for boost is that there is a lot more contact between the block and head to seal the head gasket and prevent blow-out. If you want to run really large boost (like racing engines at 25-30 PSI, or 1.5 - 2 bar) on an open deck engine, you can cut a circular groove in the head around the combustion chamber on each cylinder that lines up with the cylinder wall below, and put a big metal o-ring in it to seal the combustion chamber. I've done that with blown Alfa Romeos, which have even more open decks.

 

Closed loop is just when the computer is actually running of the information it receives from it's input sensors only, Open loop uses just the high priority sensors and a cailbration from the engineers to operate.

I haven't done much data logging yet but our cars don't run in open loop for very long at all after start up (emissions) but other than that probably only at WFO

 

well here's the 2.0 (my spare motor) with the head off.

 

http://www.crateenginedepot.com/stor...-P326C200.aspx