a 2.9 isn't going to hurt the car. it puts in on edge. or if you want to stay safe, go to a stage 3

 

You have to have a stage 2 in order to do stage 3 correct? Also Ive never seen a place to buy a "stage 3" nor do I know what it entitles?

err did a search and found it! thanks!

 

i was talking the pulley itself. you can get over 260 fwhp out of the stage 2 pulley, WITH other mods.

 

OK after reading this thread, I too have decided to go with the 2.9. I have the intake and working ok getting an exhaust. Living in northeast AL it is hot as hell here, but with winter coming I feel the 2.9 will still be safe. Car is running 12.5psi on stage2 now what will the 2.9 pulley bring the boost up to? anyone?

 

with stage 2 it should be around 15psi i believe. 12.5 is stock.

Ok so stage 3 pulley is ~2.99" and stage 2 is ~3.07" and going that extra .09 from 2.99 to 2.9 is really that much of a difference to make it unreliable?

 

its fine to run with a 2.79 pulley.

i have a 2.79 pulley 42 lb injectors GM stage tune cold air intake and have a 10.5 dyno tested a/f

SS33 has an almost identical setup to mine and a interceptor guage and he sees no knock.



I have had this discussion a million times on this site before. they always end the same.

i already know the posts that are coming after mine.
1.) HP tuners says idc is 128% duty cycle.
my rebutal the cars that i have seen blow engines around here were 60 lb cars running 2.5's and such.... i have yet to see somebody with my setup blow up their engine.

that being said...i am on the ragged edge of danger. i put down 253 hp 232 trq about 4 months ago at VT engines in lansing and had a 10.5 a/f we heard no knock or ping.

i do add octane boost before trips to the drag strip.

i have been running this setup for around 12,000 miles, two trips to the track, and multiple trips to the dyno.

all with 0 problems. i do throw a maf lean code once in a while but it turns itself off.

 

I just run 93 octane always, never any booster, and have never thrown a code.....weird how different the cars are....

 

oh yeah i have 1 stage colder plugs from CA.

 

yep, same here....good ole NGK baby

 

FYI, your local auto parts store should be able to get you the NGK BKRE7s for something like $1.29-$1.59 each... I just bought a whole box for less than a set from anywhere online.

 

correct, I work part time at pep boys and picked up the iridium ones

 

2.8" w/ a stage 2 tune...

I also have the zex 1 step colder plugs and swear by them!

However, as of late I have been feeling a bit of hesitation above ~6200 rpms that I never felt before.

-Rich

 

What kind of plugs does everyone think is the best copper iridium platnum? I have ngk 1 step colder iridium right now but i have heard you get better performance with copper? This is with the set up in my sig.

 

Obviously two diffrent OPINIONS, I agree with blue SS. I can spout off all kinds of #s pertaing to IDCs, A/f, etc. All I can say is I am running and have been running a 2.79 pretty much since I got my car home from the dealer with the stage 2. My car is FINE! And I will log on in a year and tell you how its running because, I am not changing it. I have a buddy that owns beyond redline and does dyno tuning all over the state! I know that the injectors are 100% fine!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

GM stage 3 runs 50 shot of dry nitrous to 7000 RPMS with a 2.99 pulley and 42 lb injectors.

.2 inches is not going to lean the car out more than a 50 shot of nitrous.

This debate is weak.

 

Right. So when I dyno'd my car and the A/F skyrocketed at roughly 6200, its not leaning out? Before I let off, A/F was high 12's....

 

but when you spary the 50 you are also on a stage 3 tune and not the stage 2 tune correct? Aren't they different? just asking, not talking **** or trying to show up, just trying to learn....

 

widebands don't lie.

yepo

 

Wouldn't doubt them being different. I'm sure GM calibrated it some way that when it fires the nitrous it also dumps more fuel.

 

and definately has much better timing for the added boost/ possibly nitrous

 

I think they did their homework with the Stage 3 PCM. Especially the nitrous part.

 

since we can't look at the calibration on the stg3 stuff. we are all left in the dark

 

can you if you hook hptuners up to it? right?

 

nope different OS

 

you can log them, but to actually download the map and look at it? nope. no can do