Oh those part numbers are the little bits that match the GM stage 2 bolts. One is a socket and the other is screwdriver bit. Just in case you only have one or the other. Not sure which P/N is which though.

 

O ok thanks a lot. So about the 2.8? On the gm stg2 canned tune

 

2.8, even 2.90 are big no-nos on the GM S2 tune. You will hear of people who have done it with no apparent problems, but the facts are that your injectors and cooling system will be past their maximum capabilities and you will be walking a fine line.

If you want to play it safe I would go with a stage 3 pulley (2.99). Thats what I'm running, and once again here is the differnce between S2 and S3 pullies:

http://www.youtube.com/watch?v=xa0p19jFLYw

 

So what psi of boost would I see on a 2.99 (stg3 pulley). And with a 2.8 I'd need 60s injectors and cooling mods? Also on that vid that balt that was stg3 was that only the pulley or was that the full stg3 pulley and reflash?

 

pyros--- how can you compare pullies when they are two different cars? one is a 2.2 sedan s/c and the other is the ss/sc ? thats not good information to be giving out imo...

 

This is true, but he was even with me before the S3 pulley so it is only logical. I'll see about switching the pulley out again and getting another run uploaded.

I'm not one to give out false information.

 

o i know i read alot of your posts i know your name, but i just watched the video and i got to questioning... wanted a little more explanation

 

I have a stage 3 2.99 pulley and it is noticeable . I see around 16 -16.5 psi and it helps produce more boost in the lower rpm ranges VS a stage 2 pulley. The main reason i went with it was i didn't want to deal with the heat from a 2.8 or 2.9 , and the higher IDC's that go along with those pulleys. Also in the stage3 Q&A from GM they state that running the stg3 pulley on the stage 2 tune was fine for everyday driving.

 

Iight that's what's up. On these cars. 1-1.5 psi extra is about what 10-15 whp? Or what?

 

GM claims 250hp for the S3 pulley vs 241hp for S2. Granted those are just numbers, but they do represent a claimed 4% increase in power any way you slice it.

The important part is that it is an increase across the entire powerband. I really wish I had a dyno sheet to prove it!

 

O ok running that pulley on th gm stg2 tune isn't gonna make me run richer is it? It should lean me out right

 

where can you buy the stage 3 pulley?

 

I'll sell you mine for $75.

Here's the link to the new ones for sale for $126.

http://www.crateenginedepot.com/stor...P1749C221.aspx

PM me if interested.

 

http://www.smoothflowpulleys.com/

3.0 inch pulley... better deal.

 

yea if im gonna pay more than 50, im gonna get a 2.95 from smoothflow... They do custom sizes

 

Exactly... Thats why I gave you the link... 125 hahahahahah that is rediculous.

 

yea haha... ive been looking at smoothflow... i was gonna get the 2.9 from ppl on the forum but two ppl have flaked on me and decided not to sell... i wanna do a 2.9 cuz i plan on getting the ottp h/e as soon as school is over and i return to full time work... but if no one sells me one ill get the 2.95 from smooth

 

So its ok to run a 2.95 on a gm canned tune vs the 2.99 (gm stg3) pulley

 

Yes you'll be fine with that.

 

the 2.95 will put you right on that thin line between over doing it and being safe with the injectors and heat

 

O oh so I would go up to a 2.96 or a 2.97. What psi of boost would get across the entire bandwidth?

 

Yeah it is for a pulley, but it looks exactly like a regular stage 2 pulley unless you can read the number's on it . Most dealers don't have a clue how many MM a stage 2 or 3 pulley would be anyway but visibly they won't notice a thing.

 

okay good point, but with a smoothflow, its only 4 bolts, and you have to gms2 back on and you dont have to worry about a thing anyways

 

O ok and to go any lower than a 2.95 I'd need cooling mods and bigger injectors?

And a tune right? Is a 2.96 or 2.97 ok to run off the gm canned tune right?

 

ok if you go up by hundreths, your not gonna really notice... the stage 3 is a 2.99 or basically a 3.0... the 2.96 or 2.97 is just rediculous... go by halfs.. 3.0, 2.95, 2.9, 2.85, 2.8.