Pacific Cobalt

Just got an email from Kenny at Cobalt Addiction.
The new redesigned header will be out in 3 weeks it's going to fit the 2.2 perfectly.
I should be getting around 165 WHP after this header and my XTC Downpipe goes on.
Wait for my DYNO results in about a month.

XM15

I think 165whp is a little optimistic. I would expect closer to 150whp if I were you.

By the way, what kind of header is it? Shorty, midlength, longtube?

g5mike

Iam assuming its good for all models?

JRelly

yes i agree your numbers are very optimistic

shawn672

Wait...I thought XTC was working on a header for the 2.2 w/ SAI?

mkulrey13

iTrader: (39)

ive been told 3 weeks for the past year. ive given up with them for the most part...

shawn672

every week they keep telling you just 3 more weeks? LOL

Pacific Cobalt

Didn't Crate engine depot dyno 151.69 WHP with only GMPP SRI, GMPP Catback and 2.4 intake manifold Kit.
I have all that so adding an XTC Header/XTX 2.5 Downpipe shoud give me 5-10 more HP

shawn672

no, you hit a wall at 152whp, thats what everyone else has reported, dunno if i believe it. they said the ECU or PCM basically throttle the gas

some guy dyno'd 152, but on a SS/SC header that was ported, a dp, and something else, and got nearly the same dyno sheet

edit: again like i said, im not too sure if i believe it, b/c how come when people use n2o, they're getting the exact number that their size shot should add.

IE. IF you obtained 80whp from a 75shot on a similar 4cyl, then ppl with cobalts are dynoing with that extra 80whp, but how come the computer isnt throttling and limiting the gas then??

Pacific Cobalt

You might be right I didnt specify if it's for SAI cobalts
Anyone tried the SCDYNE or ZZP header I need advice cause I have only seen bad reviews so far mostly about fitment issues, rusting, warping.

shawn672

i've heard the ZZP header is supposed to be good stuff

emailing XTC right now to get more info

wdsoccer

ive been waiting for a year in october, the companyt thats making it for Cobalt addiction keeps telling them 2 more weeks. he said i will be the first to know that its out since ive been waiting for about a year

IonNinja

it doesn't have a choice, it doesn't control the nitrous or fuel...the jets do. the only thing it can do at that point is pull timing which you should do anyway under that type of shot.

shawn672

ya but why would the computer cut back on fuel if its making 152+whp, but not do the same thing with n2o or a super/turbo charger?
You would think if this is true, the whole 152 wall, then if you strapped a turbocharger to it, it would try to fight the effects and lower your total hp...

IonNinja

the ECU doesn't control fuel on a wet nitrous kit

also the limiting factor is the motor itself...at this time it can only move so much air that opening up everything possible wont benefit you any if you can only move x amount of air at a given RPM.

to overcome this you need a cam with more lift and duration to allow for more air.

with a turbo/supercharger you are cramming in compressed air so it can take advantage of the larger exhaust and intake. Also at that point your stock injectors can't even support F/I because you are moving more air then you can provide fuel for so you can't cut back on already maxed out injectors.

shawn672

do you do think that the 2.2 has a "152 wall"?

Brandon97Z

iTrader: (1)

Its not a "152" wall since thats just merely a number spit out by a dyno, could be 135 on another or 165 on a another. Its more of a cfm wall. The motor can only pull in so much air, like stated above cams will help by allowing the motor to bring in more air. Tuning is playing a big part too as your allowing the engine to breath better but no fuel is being added.

IonNinja

i'm sure you could get more power out of the motor alone just from increasing the timing a little bit.

but it pretty much comes down to needing a way to tune no matter which route you're looking to go...

Novajoe

we need more than just a way to tune. We need a way to raise the stock rev limiter.

Without a higher rev limit to take advantage of more aggressive cams the only ways to pull more power out of the motor is to raise the compression and add supporting mods that put more power to the ground

Brandon97Z

iTrader: (1)

With mose tuning devices they allow you to raise the limiter. But it will all depend on the cam grind.

Novajoe

not with our piggybacks. You need to eliminate the factory fuel cut. And that's just not possible with a piggyback system.

YellowLT

I only Made 138 with all my stuff.

Novajoe

no 2 cars are alike... also all you really have for engine performance is I/H/E

Pacific Cobalt

Good Point I agree that there is only so much air you can get into the engine. If only there was a tune for the 2.2 I would add a comp. Cam and the Stock SS fuel Injectors.
Come On SCT We need your HELP