hello everyone looking for some answers i have a 2007 cobalt ss/sc stageII kit injen CAI Headers and 3 inch down pipe and maganflow exhaust do you think i would be safe to put in the 2.80 pulley. Do ypu think that i would blow the engine?? anyone else have this pulley?? please i need ur input before i do something to hurt my engine or blow it up thanx in advance

 

you'll need 60# injectors

 

you need a custom tune and 60lb injectors to run a 2.80 pulley. do not put the 2.80 pulley on a gm stage 2 car.

 

I need an answer for this also. Im the same set up, but i have a stage 2 clutch and a 8lb flywheel. Gm says for the stage 3 pulley your suppone to install the dual bypass intercooler plate.

 

read what i said above your post ....

 

just a quick question what would happen if i did??

 

many things can happen .... the worst being a popped motor. trust me don't do it unless you are going to get a tune, 60lb injectors, and cooling mods.

 

at the very least it will run hot and lean. at the worst, you can pop a cylinder.

Need 60#s and cooling mods.

 

and a tune .... you shouldnt run a 2.80 pulley on a GM Stage Tune unless its a custom GM Stage Tune.

 

Don't do it.

 

well look at it this way.
i'm an LS using a 2.8, with no issues for quite some time now.
just get a good heat exchanger, dual pass, and a good tune.
everyone says 60s are necessary but they are not.
i know plenty of people using 42s.
my usage on the 42s are 86%.
most say not to go over 80, but its not a big deal if you have a good tuner.
if you haven't bought any injectors..keep in mind 60s are a bitch to tune for so def find yourself a good tuner.
for a good tune, contact trifecta performance.
vince can send you a tuner, and data log you to ensure you're safety. one of the best tuners out there for gm cars, period.

 

yeah you are on 42's with a custom tune thats why your car is ok. 42's + GM Stage Tune + 2.80 pulley = No Good.

 

an ls 2.2 engine reacts entirely differently than a ss 2.0 engine. head flows a hell of alot more on a 2.2 creating less boost and less heat. plus you have a custom tune.

Compare apples to apples, people.

 

yes i run 15 psi max, but what difference does it make...
he's asking about safety and reliability.
my bud bigoldred used 42s for over and year with a custom tune and it was fine.
he had an ss/sc. now turbo'd. i was explaining the difference between the use of 42s and 60s.
using 42s leaves no room for improvement, but 60s are a bitch to tune for as everyone knows.
EITHER way so we flow more air because of larger pistons, and cams are different, flow is different, compression is different. different psi thats all good n gravy.
i was also stating that if I can run a 2.8 pulley on my weak STOCK ls internals with no issues then he'll be fine. especially with a good tune, and some cooling mods. possible since ss/scs obviously have internals made for boost, along with all the other bells and whistles to help a 2.0 work better with it.


also i'm sure anyone else with a 2.8" pulley can chime in and talk about how their engines have held up just fine. again with proper supporting cooling mods for the extra heat and a good tune. also an exhaust upgrade wouldn't hurt either.

 

uhhhhhhhh wut?

 

what...you didn't hear?
i took my car to capital chevy and they customized my stg 2 tune




simple mistake on that one haha

 

uhhhh like when you use hpt to alter a stock GM Stage Tune. There were a few people on here that ran a 2.80 + 42lbers on a custom GM Stage Tune. I didnt mean GM makes a custom GM Stage tune.

no its not a mistake .... i wasnt talking about a custom tune from GM. you can alter a GM tune with HPT.

to prevent anymore confusion just do it right OP. if you want to run a 2.80 pulley go get yourself some 60lb injectors, a custom tune, and cooling mods and you are set. better yet buy the OTTP Stage 1 kit you will get all that is needed (minus the cooling mods) for $350.

 

i know whatcha meant, it was just funny on the wording
good point though. however it might be easier to just part the kit.
ottp is expensive. stage 2 is 40 usually, 60s can be found for 100ish, pulley and hub, not more than 80. plus add a dual pass, 100 ish with core back, and a 60 $ cobra h/e plus stock and you're set. a good tune is the only part it just depends on how you go. modifying the stage 2 tune though isn't a bad option, base/canned tunes are how a lot of people start tuning anything then its just tweaked a bit.
either way good luck original poster, hope we've given you some info to chow down on.

 

sorry to cause confusion man .... typing on the internet sucks. you have to be so careful on the wording.

 

lol well the way u said it implied taht u went to gm and they gave u a custom tune..just put like changed gm tune w/ hpt or something instead makes a lot more sense

 

will do