s/c the 2.2

[matt11583]

ok mayb im missin sumthing here but i gotta ask. the base model cobalt is gonna have a 2.2L egnine the supercharged is only in a 2.0. would it make more sense to take a s/c n put it on the 2.2. or does the s/c model have a bigger tranny and suspension?? ssbigblock thanks for teh help... u seem to b the only person on here that knos much bout the colbalt.

[kman10587]

Incorrect; the Cobalt SS will have the supercharged 2.2-liter ECOTEC engine. I dunno what 2.0 Chevy has, but it ain't in the Cobalt.

[matt11583]

i jus got off the chevy site n it says it has a 2.2 ecotec dohc 4 cylinder rated at 145hp and a 2.0 ecotec supercharged dohc 4 cylinder rated at 205hp?? u sure that the 2.2 is the supercharged one

[kman10587]

Well, either www.edmunds.com has a typo or www.chevrolet.com has a typo...I don't see why they would reduce it to 2.0L for no reason like that, so I think it's Chevy.

[matt11583]

carsdirect.com has it as the 2.2 or s/c 2.0 so i thnk edmounds is wrong but i dont get y they did it... so would i b rite by tryin to get a 2.2 n put the s/c on it????

[kman10587]

You're right, it's a 2.0. Edmunds has a typo in their specs sheet, and they clearly state in their Editor's Review that it is a 2.0.

[89IROC&RS]

my guess is the reduced the displacement to lower compression in order to run the supercharger, you cannot run a forced induction with a naturally asperated compression, or the engine will detonate its self to peices. the 2.0L ecotec is the one that they use in serious drag racing applications with a large turbo, so im sure they just took it out of the toybox, threw a supercharger on it, and put it on the production line.

[SSBigBlock]

Originally Posted by matt11583

ok mayb im missin sumthing here but i gotta ask. the base model cobalt is gonna have a 2.2L egnine the supercharged is only in a 2.0. would it make more sense to take a s/c n put it on the 2.2. or does the s/c model have a bigger tranny and suspension?? ssbigblock thanks for teh help... u seem to b the only person on here that knos much bout the colbalt.

Not a prob man. I'm still trying to do research on it to find out more info. But havn't much time since I started working at a Super Target. Working at night and sleeping durning the day had me a fuckered up. So it leaves me with lil time to do things.

[=OrangeZ=]

Originally Posted by 89IROC&RS

my guess is the reduced the displacement to lower compression in order to run the supercharger, you cannot run a forced induction with a naturally asperated compression, or the engine will detonate its self to peices. the 2.0L ecotec is the one that they use in serious drag racing applications with a large turbo, so im sure they just took it out of the toybox, threw a supercharger on it, and put it on the production line.

wrong

you can slap on any type of FI on to a N/A car its all about the fuel regulation so some sorta messures have to be taken like a reflashed ecu/pcm or a secondary full regulation system like a fmu and afpr and larger injectors

i did all this straight from a Kit GM made for there N/A 2.4 cavalier im now more then 50hp over stock rating right now and will probley be double that when im done and its all done on a compression of 9.5:1 which is stock

the 2.2 is also getting a supercharger kit this year or early next and will work fine on stock compression and that compression is like 10:1

like i said its all about meeting the fuel requirments/regulation needs and knowing what your talking about which im guessing you dont but its ok there was a point when i didnt know ether so it all good just go read some books about turbos and superchargers or something

btw GM went with the 2.0 because they destroked a 2.2 block so that it would rev faster and higher though they still have a redline of 6500 which beats the heck out of me why they would do that when the s/c 2.0 is still making power when it cuts out at 6500. 7000-7200 is a more practical redline for this engine but this is what gm stated that they didnt have enough time to test it at this level so they are releasing it as is, maybe they will figuer it out someday

[89IROC&RS]

orange, watch your wording. if i throw out incorrect data, or something you disagree with, than say so, but dont insult me because you disagree.

for you personal information, im an aeronautical engineering major, worked for two years as a corvette, electronics, and driveability specialist, and have been focusing on engine design and combustion mechanics for the past few years. know very well about fuel and spark curves, and tuning fuel injection systems, and will soon be up to programing my own PROM chips for custom applications. so yes, i know what im talking about.

the question was why GM supercharged the smaller ecotec. it was cheaper, because you do have to do alot of work to a high compression engine to run FI on it. its cheaper to put the sqeeze to a lower compression unit. as far as running FI on a naturally asperated compression engine, it will cause accelerated engine ware, due to extream cylender pressures, in fact the ecotec was tested with 10:1 compression and a high boost turbo and they wound up blowing head gaskets because the head was warping from the pressure in the cylender. If you are running a strip only motor, yes you can run high compression and high boost, but if your on the street, and dont tear your engine apart for maintanence on a regular basis, you need lower compression to run boost. im not talking 5:1 or anything like that, but somwhere south of 9.5:1 as a general rule of thumb, like your kit for the 2.4L. i have heard of people running 5psi on a 10:1 LT1 engine, but even the SC 3800 (which has a lowered compression) runs 8psi, so whats the point of 5? oh and if you were trying to say that the 2.0L ecotec was designed for the cobalt, your wrong, it is the drag motor they have been using for years. go check your facts before you attempt to correct me.

[89IROC&RS]

oh and while i dont have specific information, the Cobalt SS does come with a stronger five speed transmission specific to that model.

[DSM3000gt]

<b> The 2.2 Litre Ecotec is being dropped by roughly 200cc in the stroke via shorter piston rods. This is to drop the compression ratio, which will compliment the Eaton Roots type blower's torque capacity. It is also getting a transmission with a modified final drive ratio, tighter 1-5, throw shorter by 1 inch, carbon fiber/bronze gears to dissipate more heat (prolong life).

In short:

The engine will lose 200cc to increase the torque output of the blower.
This is because more bore to less stroke = more torque (its a law of physics... fluid movement).

The drop in 200cc will help put more torque on the ground and sacrifice some hp, but 205hp in a 3300 lb car isn't too shabby for $22,000.

It will be an SRT-4 stomper, to say the least. NO TURBO LAG!!!!!
</b>

[DSM3000gt]

Originally Posted by 89IROC&RS

my guess is the reduced the displacement to lower compression in order to run the supercharger, you cannot run a forced induction with a naturally asperated compression, or the engine will detonate its self to peices. the 2.0L ecotec is the one that they use in serious drag racing applications with a large turbo, so im sure they just took it out of the toybox, threw a supercharger on it, and put it on the production line.

exactly! Sorry, I saw the first two posts on here and pounced on a reply

89iroc knows his stuff

[89IROC&RS]

*shakes DSM3000gt's hand* thank you my good man

[noshun]

FYI the compression ratio was dropped from 10:1 to 9.5:1. In a GM test the 2.2 EcoTec simultaneously blew all 4 rods at 283 hp! Not good so It's not just a case of air/fuel! Your SC is running 7 psi which is a small amount of boost! The ss S/c runs 12 psi! That's 171% the boost you are running. A small amount of boost like you have isn't enough to do too much damage albeit that you have a completely different motor. In stock 2.2 form don't be expecting to top 9psi on stock internals without some serious reliability problems. Sure GM blew the rods at 283 but this was instantaneous catastrophic failure and not to be confused with increased wear from use. The Big ends will probalby give out if the wrist pins don't do so first, result! F*cking Mess!