Turbocharging the LT?

[laxman12786]

I can't wait for the SS (and also am not sure I could afford it lol), so I was just wondering if anyone has any ideas about turbocharging the LT version of the cobalt (obviously with the ecotec 2.2l engine). I know that the compression on this engine is up somewhere around 10:1, so I don't know how well it would work without risking blowing the engine. Also, the LT is only available with an automatic transmission (as far as I know). Could this engine/tranny combo handle the boost and power I would be putting into it without modding internals such as the pistons?

[89IROC&RS]

there are several turbo kits available for the ecotec, that push power up to around 250hp. The only weak link in the internals of the ecotec would be the connecting rods which give up around 300hp and the crank can only handle around 400-450hp. Naturally if you are running 350-400hp in a forced induction setup you would want forged pistons. Other than that. I would say any of the current ecotec turbo kits would work just fine.

[noshun]

Originally Posted by 89IROC&RS

there are several turbo kits available for the ecotec, that push power up to around 250hp. The only weak link in the internals of the ecotec would be the connecting rods which give up around 300hp and the crank can only handle around 400-450hp. Naturally if you are running 350-400hp in a forced induction setup you would want forged pistons. Other than that. I would say any of the current ecotec turbo kits would work just fine.

Gm ran test and blew a an ecotec with stock 2.2 internals at 283hp. All 4 rods blew at the same time causing some pretty catastrophic damage.

here is kit that doesn't have an intercooller although the i/c kit can be added at $995

http://www.cavalierconnection.com/online_catalog.htm

The EcoTec on the Ion redline and SS S/C are both destoked 2.2 Ecos hence the 2.0 displacement. They lowered the comp ratio to prevent the rods failing. This also helps to prevent Detonation. Although I wouldn't run regular gas in it at all and this lower the risk of detonation.
The compression ratio was dropped to 9.5:1 from 10:1 to allow for 87 octane and decreased rod stress. If you put stronger rods you could run more boost. It currently runs 12 psi so this gives you an indication ofhow the rods were swapped out to enable this relatively small amount of boost. I wouldn't top 8 or 9 on stock internals.

[street_rx]

Laxman I have 2.2 Cobalt TurboCharged, With Larger intercooler, Im around 230 to 240hp now, thats not much but its alot since the Cobalt is so light, I still have Automatic also, I havent had any troubles yet but never know...also I have Boost Controller, I have it running between 14 & 16psi most of the time...The accelration is awesome and I have already smoked 2 Cobalt SS with Stage 1 Kit set up, Which they are Sticks so you gotta know how to hit the gears if you wanna win I paid 3400$ for my turbo with the Intercooler also from Turbonetics if you want the site to order a kit in the future here it is http://www.sportcompactonly.com/prod...02194&c=43&l=2

[graphicassult]

I dont see how your running a turbocharged cobalt 2.2. It is impossible with the computers in the car right now. Tuning is coming out next year sometime. So until then your b.s. without pictures or video

[red_line_cobalt]

First off you dont have a turbo kit so give it up! no companies are selling a good enough system to break the 2.2 computer yet. so you are running stock fuel computer, witch is shit. i did a lot of reseach on the turbo kits for the cobalts, i took it to several tuning shops 3 machanics and to 4 chevy dealers! and this is what i got from everyone who new what they where talking about... the 2.2 has 10.0:1 compression(very high, only good for N/A) with these internals you could only run up to 4 psi of boost, safley. at about 6+ psi you are looking at some big problems. sorry guys but turboing is a bad idea cuz you will spend a good 2000 plus before you even get the kit, thats for setting your car up for the turbo. then you got to buy the kit and instal it. i would raher sell and buy SS or spend that 4+ grand on other things you could do to your car, cams intake full exhaust header lowering kit inerior bodykit... it goes on.

and for the one who was not sure about getting a LT in stick... you can

[GearGrinderGTS]

Interesting, there is a turbo kit out for the Solstic 2.4L VVT. And.... that engine (with higher compression) can run 8 lbs of boost SAFELY.
http://www.turbo-kits.com/solstice_turbo_kits.html

Oh.. .and looksie.... a 2.2 Ecotec kit. 8 PSI on stock engine???
http://www.turbo-kits.com/cavalier_turbo_kits.html

10:1 compression isn't that high these days. With varial timing, cam phasers, advances in ignition.. you can run a turbo or s/c on a 10:1 compression if the engine is build right.

Stop all this "you cant boost ecotecs" non sense. I haven't been on this site in like 3 years. And still. You guys talk about this kinda stuff and really dont know that much. Hell I dont feel I know a whole lot but... thats why I keep my mouth shut on certain subjects.

Oh and as your subject on how much a trans can handle....the 4t45e can handle up to 280 ft/lbs of torque... So its not really a weak point untill you start upping the dosage of Vitamin B

[cavaliercrazy]

Haven't any of you guys been to jbody.org? Plenty of guys on there have turbo'ed Eco's. They are mostly in cavalier's or sunfires tho. In the spring time I'll be one of them! It can and has been done.

Good luck

[R@bbit]

looking to boost and boast, huh? check www.maximumboost.net they have stage 1-3 turbos.. just for the record... and they are cobalt fit, not cavalier....

[-Jayson-]

Originally Posted by R@bbit

looking to boost and boast, huh? check www.maximumboost.net they have stage 1-3 turbos.. just for the record... and they are cobalt fit, not cavalier....

LMAO dont ever buy from that company, the fact that you recommended them makes you look retarded. Thats not a real company for one, all it is, is some kid who works out of his parents basement. He buys parts of ebay, puts them into a half assed kit and sells them. He knows little about cars and turbocharging them.

The 2.2 Ecotec is a great engine to boost 10:1 compression is not to high, ive seen those engines take as much as 22PSI with a stock block. You dont neeed to have software to tune the engine, there are other ways to tune it.

[d1ck]

Yeah, such as a FMU. (Fuel management unit) This controls fuel pressure by the amount of boost. Although the best method of fuel management would be to get a megasquirt or something similar which would replace the factory computer.

[cobaltracer07]

yeah i have the ls level two and yeah you can get a turbo but the lag, 14 psi is goin to give you some bad lag which is not worth it cuz of the parts and and stages is not worth it. i would rather get a supercharger yeah i would have to do all thoses thing just like a turbo but no lag and better performance, get one upgrade like the pulley on the charger and the same as a level four turbo. and yeah i got the cheaps cobalt but think i dont have the wait of the window motors the door locks and i have the 5 speed in which i'm looking at the short throw shifter and one quick question where is the computer on the '07?

[d1ck]

Originally Posted by cobaltracer07

yeah i have the ls level two and yeah you can get a turbo but the lag, 14 psi is goin to give you some bad lag which is not worth it cuz of the parts and and stages is not worth it. i would rather get a supercharger yeah i would have to do all thoses thing just like a turbo but no lag and better performance, get one upgrade like the pulley on the charger and the same as a level four turbo. and yeah i got the cheaps cobalt but think i dont have the wait of the window motors the door locks and i have the 5 speed in which i'm looking at the short throw shifter and one quick question where is the computer on the '07?

It's much easier to make power with a decent sized turbo then with a supercharger. You can easily change the amount of boost and turbo's are much more efficient then superchargers as well, the turbo's main disadvantage being heat and turbo lag (Which you mentioned.) However, With the a turbo properly matched to your engine you don't have to worry about lag too much. If i'm not mistaken, I think the computer is on the passenger side under the dash. I don't own a cobalt though, i think i heard someone say that before.
EDIT: My guess would be a T3 .50 trim would be a good size for a 2.2 but you can research this for yourself.

[heavyhalf]

I have a 2006 Colbalt LT I dunno if it is supercharged or what but this is what happens to my car. When I start the car it sounds like a super charger when u start it up cause you can here it whissle. When I take the car on the highway and I take it past 4000 rpm it starts to wissle and has way more power I don't know if it is normal or not. But I raced my cuzin 2005 sunfire and his engine is the same as mine and I had much more take off then he did.

[-Jayson-]

Originally Posted by heavyhalf

I have a 2006 Colbalt LT I dunno if it is supercharged or what but this is what happens to my car. When I start the car it sounds like a super charger when u start it up cause you can here it whissle. When I take the car on the highway and I take it past 4000 rpm it starts to wissle and has way more power I don't know if it is normal or not. But I raced my cuzin 2005 sunfire and his engine is the same as mine and I had much more take off then he did.

yeah sounds like you got one of the rare supercharged LT models. Gm was playing around with a smaller supercharger to put on the 2.2L, its hard to find cause its hidden underneath the engine. Its powered off the crank shaft. Makes low boost around 2 PSI or so at most. I think the engine is rated at like 160HP.