will a stage II with a 2.9 pulley run fine without a tune?
thanks

 

sure will considering thats what stage 3 is when you are not running the 100 octane tune!

 

As far as I've been told Stage 2 + 2.9 is "ok"

You could probably get it to run "better" with a tune... but the base Stage 2 tune is so rich you'll be fine. I wouldn't reccomend going any smaller.

 

im just curious why everyone buys stage 2 then upgrades their pulley, then upgrades their injectors.. and gets a custom tune LOL?


is it just b/c they get a lil power and get addicted and keep wanting more?

i mean you buy stage 2 to KEEP YOUR WARRANTY thats all... think peeps need to realize that.

 

it will run no problem. stage 2 plus a 2.9 is stage 3, except you can switch to the 100 octane tune whenever

 

thats a car by car response. It will run better with a tune, but if your wanting to keep warranty your just doing the pulley. Then the question you have to ask is will it be safe? And the only way you can insure that is by monitring with a WB A/F gauge and an Interceptor would be a good idea too.

 

im just getting a stage 2 because im not lookin for major power
i want it to be reliable and everything
if i want power i go to the left side of the garage =]

 

just go gm stage 1, save your money with buying stage 2, get the gm stage 2 belt, and a 2.9" pulley, save the money and hassle, then just go to your local chevy dealer and ask for a stage 2 retune.

 

they are the same tune so going back to get the stg 2 tune wont do anything

 

I have the stage II with a 2.85. Mine runs great with no problems. I've put zex plugs, added some exhaust and intake work. You should not have any issues with a 2.9.

 

You shouldn't have any real running issues. I was fine then i added an intake and driveability got kinda crappy. Every car is different. I just got HP tuned recently and it's so much better than the canned Stage tune.

 

get the stage 1 and buy the belt, and switch out your pulley

 

how do you do the hp tune
?

 

But what about the stage 2 hub? Won't you require that for a smaller pulley?

 

i ask this in the sticky above but i didnt get an answer but how do yall know stage 1 & 2 is the same tune? not trying to be an ass.

 

2.9" pulley is not stage 3.... Stage 3 pulley = 3"
Stage 2 pulley = 3.1"

That being said, 2.9" pulley is OK so I have heard. I would suggest an A/F gauge if you do though. Personally I wont go under stage 3 pulley without an A/F gauge

 

oh ok thanks guys

 

???????????????????

 

I tuned him

 

what kind of injectors do you have and how long have you been running that setup for and how much boost are you pushing? thanks.

 

Man, I wish that HPTuners could read the Stage 3.

 

answer my damn question!!

 

About the a/f gauge. I've always wondered why people try to tune with a narrow band o2 sensor. It will never be right. Get a W/B sensor and use that if you want to seriously tune. A/F gauges are just "eye candy". Not trying to step on anyone's toes, just my .02 for what it's worth.

77.9mm is stamped on the pulley for stage 2. That's 3.066". I was always under the impression that it was a 3". Guess after I got it I found out different after I got it lol.