i only run 93 octane and i have a stage 2 with a 2.9 pully i've heard that they need to be gapped at about .040 and that the copper NGKs are the best? if so i can get 4 of them for 12$

 

so trying to get this right. anything below a 2.8 size pulley should have 60lb injectors and anything above that will run fine with 42lb injectors?

 

Not sure if you are aware that GM runs the stage kits pretty rich and that they retard the timing on them quite a bit as well. The 2.9 versus the 2.79 debate has been going on for quite sometime now.

I agree that an AFR read is always a safe bet. But, you are NEVER going to run lean on a stage 2 tune and 2.8 pulley, if you want to trust a 17 year old with a laptop and HP Tuners for your information...thats up to you.

Sadly enough, the 2.79 pulley leans the car out closer to where it should be.

As far as IDC is concerned there is conflicting information and graphs. I personally don't think it is unsafe. GM runs a 50 HP dry nitrous shot on a 2.99 pulley with the 42lb injectors and they state right in the kit you can run it safely WITH nitrous to 7000 rpms.

And if you look at the threads you will see more people have blown a motor due to 60 lb injectors and trying to tune for them which is next to impossible since they are WAY to large for our application. If anything go with 46 or 48lb injectors...what the hell would make someone go from 42's to 60's? Little over kill. I think people forget about fuel pressure...you realize our cars run between 50 and 62 PSI right, forced induction cars have a variable fuel pressure through the rails, but we can get into that at a later time. Your car comes with stock 36lb injectors for the stock 3.34 pulley. So they bumped up 6lbs to 42's to run a pulley that is .24 inches smaller. Yet you are saying it is safer to bump up 18 more lbs to run .3 smaller pulley? And this doesn't seem like over kill to you?

GM uses the 42's for a dry 50 and 2.99 pulley...you'll be fine...trust me your not packing in more oxygen with a .2 inch smaller pulley than you are with 50 shot of nitrous. I think perhaps you should listen to the people running the pulley instead of the guys with a different set up. Plus I challenge you to go back and find how many threads on how many cars have blown up due to 2.8 and GM Stage 2...you won't find many if any at all that don't have something strange about them like...well I had this CEL on for three weeks and then bam..never saw it coming.

 

Don't go under a 3" with 42lb injectors unless you like playing Russian roulette.

 

Maybe? If you live in arizona. I have had a 2.79 on my stg 2 for 10,000 miles.
Not even a code!

 

Ok so what is the best for stage 2? I want to be fast, but at the same time have my car be reliable. I dont want any problems with it. So does anyone have any advice?

 

IF that is you position the dont MOD outside of standard GM MODS. Thats the only way to be 1000% sure, without droppin lots of cash.

 

ok cool just checking. also what kind of intake should i get??? Does injen work, and sound pretty good with the stage 2 upgrade?

 

i just put a fujita f5 on mine yesterday and it sounds amazing!! i love the way the supercharger sounds now and you can feel a difference!!!!! i have no CEL and it fit perfect

 

ok. Whats a cel by the way?

 

No one can tell anyone what size pulley to run safely as there are way too many variables invloves such as altitude, air density in that area, outside temps etc. I know guys running 2.79's on a stage 2 tune with 42 lb injectors doing just fine, and I was dangeroulsy lean on ours with a 2.85 pulley at sea level (even our stage 2 pullley was not rich but rather lean side).

 

You are 100% correct!!! Nice car by the way!!!!

 

Well i live in the desert, and the only place i really drive to is beach, or maybe the mountains, but that is very rare....

 

Check Engine Light

 

What intake should i get? Im debating between the Fujita or the Injen..... Im getting my stage 2 pretty soon. So i need your help between which one i should get. I have an 06 ss/sc so they will both fit perfectly right?

 

all intakes will fit, generally speaking....i think its all a matter of taste...i've got a k&n on mine and love it to death, just preference

 

You keep saying that every oppertunity you get....
but there are countless people who have been running 2.8-3 inch pullys on stage 2 cars for over 2 years now and not one of them has popped the motor.....

maybe you should rethink that.

yes the IDCs are pushing it, and it would be better to go 60lbers....but the simple fact is....its not nearly as dangerous as a few people like to say.

 

Ok i guess im rolling with the Injen then...

 

HOLYSHIT!!!! I just checked mine, I have a stage2, I bought the car used 3wks ago and the original owner had the S2 installed at a local dealer , all the paper work is in the car. As I said I just check mine and I dont have the correct calibration in my pcm. I have a 06 and it should be, 12607645. After checking on the link provided on page 2 of this thread I have 12607605. Guess I need to take my car to a local dealer and MAKE SURE they do it right.