Heard alot of different opinions, trying to finalize a decision. Thanks Guys.

 

Depending on the guy who is tuning it and if you have supporting mods. You can go all the way down to a 2.5 pulley. Some say its too small and it over spins the m62. But after 20k+ on a car with it pushing 300whp i took the supercharger apart and it looked perfect still.

You're going to hear a lot of different stories, but what i would say is stick what your tuner feels comfortable doing.

 

Ill be going to tunetimeperformance here in NJ...I believe there a sponsor here

 

Then honestly dude, I would go with what they feel they can tune safely. What people say on here doesn't really mean much. Whatever that company can do and be confident about I'd go with.

 

Yea I dropped them an email...ill see what they say. Still would like to hear some other opinions...general consensus i get here is dont go smaller then a 2.8 without colling mods but then i hear guys running small just find without

 

Well if they are under a 2.8, im sure they are running cooling mods...

My two cents: No cooling mods, 2.8... If you have just an h/e, 2.7 - 2.75... Meth injection about 2.6 - 2.65.. If you have EVERY cooling mod you can think of, maybe throwing on a dual pass with option b tank, 2.5..

Due to the efficiency loss, i would say 2.6 should be the lowest you should go.... Reguardless if the supercharger break, and +++ cooling mods, it would still get so hot it would alter the air going into the manifold and reducing power...

BTW are you getting a new cobalt, or a 05 06 07? The new ones are turbo, and you wont need a pulley

 

just go a 2.8 and 60s best thing to do

 

Yea Im well aware of the differences...not sure if i wanna spend 22,xxx for a new one or pick up a used for 14-16k. As long as I can get a sc version in the 12's with not too much ill probably end up going used. Dont wanna go nos,etc....Be nice to get a bolt on/pulley'd car there.

 

You are not going to get a bolt on SS into the 12's. With a good driver, you will be mid to high (mostly high) 13's with your basic bolt on's.

 

Hmm thats not good, might have to rethink the v8 then

 

not true. intake exhaust and pulley and im traction short of 12s. hatrick stu has stage 2 with intake and exhaust and is just shy of 12s also. a bolt on ss will hit 12s but you need to be a good driver.

 

Yea thats what i figured. Ive seen guys w/ pretty much just pulley swaps running lower 13's..Dont understand why a few more bolt ons wouldnt get you 12's...Plus im not so concerned w/ actually running 12's, im more concerned w/ trap speeds..which basically proves you have the power to do it. As long as i can hang w/ some v8's on the street and beat up on some Gt's ill be happy

 

^^^^ I second this...

 

2.7, 60s, tires, mounts, meth (with advanced timing in the tune), intake / exhaust... id say low 13s...

maybe even high 12s... deffinatly good trap speeds id say as well...

 

There was some one on here with bolt ons and spray that hit mid-low 12s. So things are possible just set your goals and do what is needed to get to that.

Maybe not look for a massive amount of power more like decent power and great traction. The old saying is you can have 1000hp/1000tq but what can you do in a quarter mile?

 

If you run a 2.7 or smaller you should have cooling mods. Anything smaller than a 2.7 and it wouldn't be a bad idea to run meth.

 

but its not true. i ran a 13.3 in a 20mph headwind

 

Do NOT go smaller than a 2.8 w/o cooling mods. I survived fine on a 2.6 w/o cooling mdos last summer, but I was lucky. It was luck more than anything. If you have a h/e I'd go to a 2.6, but get meth soon after if not before.

 

Does anyone have an opinion on a 2.6" with a dual pass, h/e, and colder plugs? Right now I have a 2.8" and I have been considering getting a 2.7" or 2.6" and getting retuned...

I do NOT want to get meth right now, and I'm not certain if I will ever want to get it...

Will the Stage 2 belt slip with a 2.7" or 2.6"? Mods are in sig. Thanks

 

Why not get meth, if your getting retuned, you can get about 25 hp out of it...

Anyway As long as you have 60s... the 2.6 will run, but it will get hot... And i still think a little too hot to run... After a few pulls youll probably start to lose power cause your sc will get so damn hot..

 

Meth would be fine, but I don't want the additional expense or hassle of meth right now... I know you can def add some power with it, but right now it is out of the question. My retune is free, so I only wanted to spend like $60 and now and get a pulley.

I am thinking a 2.7" is the way to go with things... I just don't want belt slippage. Any ideas?

 

my 2 cents, I wouldn't drop below a 2.7 with 60's even with cooling mods. Without cooling mods, I wouldn't go below a 3.0 pulley.

Me personally, I won't go below a 2.9, and I'll consider myself maxed out on the stock supercharger setup. I rev to 7500 and the 2.9 is the lowest pulley I can go without overspinning the supercharger to that engine rpm. I can be in the best effiency range and all. But that's my own opinion and research.

 

I would go with a 2.7 unless u get meth... And there wouldnt be any belt slippage... i used a stock belt on my 2.8 when the stage 2 broke and it worked fine till i got the stage 2 replacement.

 

Sounds good, 2.7" it is... I am trying to go as safe and reliable as possible (which I know isn't really a combination with cars...) I only rev to 7000 with an occasional 7200 redline. I will be retuned for proper air/fuel up high. I grabbed a ZZP 2.7" in black to make it a little stealthy.

 

Good ****... 2.7 would be awesome i think... Wish i had the cooling for it.