what is the smallest pulley i can run without a tune or injectors..

 

Ive heard 2.9 and thats still streching the duty cycle on the injector.

 

I wouldn't even want to do something like that

 

2.9" is suicide. its not a matter of "if" something will break, its a matter of how soon it will break

3.1" is relatively safe. any more than that and you really are pushing your luck. you also need to run 1 heat range colder spark plugs with any pulley smaller than stock.

 

And a 2.9 is only alright if you already have the stage two reflash.

 

While 2.9 runs a little lean, I ran with my old Redline installed for a couple of months without any problems. You'd definitely want to get a tune and larger injectors especially if you have any other intake/exhaust work that's freeing up the air. Personally I LOVED my billetflow pullies. I had one pulley go bad on me after about 9 months and called Billetflow and they replaced it free of charge no questions asked. I think all I paid for was return shipping. I had a blue pulley that matched my Blue Saturn and it really looked great. http://www.billetflow.com/supercharger_pulleys.htm

 

3.2" should be the smallest.

 

with a stage 2 kit i should be safe to run a 2.9 right?.

 

I run the 2.79" with the stage 2 tune and DAMN!!!! It is off the hook!! I am completely satisfied.

 

I thought going any smaller than a 2.9 with just the stage two kit was a little risky?.

 

The only thing that kills these cars is heat. I have methanol injection, cobra heat exchanger, the dual pass, and a kinda sorta small other secret to keep my intake temps really cool. I am getting ready to drop my pulley size down to like a 2.5" and get my blower ported and polished, to also drop intake temps, and new high performance blower bearings. My little car SCREAMS!!!!! and I haven't even been able to tune my car yet, going to order the program in a short while and learn to do it myself. Then to the dyno for my close to 400whp pulls!

 

3.1, because tahts wat im doing soon

 

I say the smallest you can run with out anything else would be stock.

Dont go cheep on horsepower and boost. **** tends to blow up if you do!

Mike

 

I ran a 3" for a month or two until I got the Stage 1 flash and injectors. You can do it, I wouldn't tell you to keep it like that though. Save up $500 and get stage 1 at the same time. Don't be cheap.

 

im going to bite the bullet and revive another one of these. im running a 2.9 for almost 2 years and about 57??? i cant think but as long as your not wide open all the time. id like to say im pretty conserative. but i dono its had no problems besides that damn sunroof and poopy tires

 

Now when you go do the stage 2 conversion with GM do you have to tell them what # injectors you want or how does that go into play?

 

400whp? i really really really doubt it.

 

I currently have a 3.1 on all stock with no problems.

 

you and many others do, so all I can say is watch and learn man.

 

It will be a gift of god to see over 300whp unless you have nitrous, and goodluck with that 2.5, i hope you have or plan on pistons in the future.

 

it is.


about the post that heat is the only killer, what about running lean as hell? do you have a wideband? i bet you're a/f is crazy lean runnign a 2.79 on a stage 2 tune.

 

stock pulley my idc's were 120%

 

And iam willing to bet burntorange has never loged his car or seen his afr or egt temps.

 

just toss a 2.5 on there and let us know what happens

 

i know. i bet they're off the charts. if heat is the only thing he's worried about, he's going to run into some serious issues in the near future