just got stageII
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From: Houston
ya it would make you go faster, but always could easily go "boom" as well, put on high fuel injectors and you should be good, and i dont think if you put a 2.9 on that the stock belt will fit, but i dont know. soooooooo basically if you put everything on that the stage two offers, no worries
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From: Maryland
man i love the 2.9 pulleyn it gives you a
little whisle at the end of every lite rev ..but a couple of day ago i think i blew my cat out and possibly the resontor also can the stock down pipe and cat hold the boost.....and what r u supposed to boost at with that pulley?????????
little whisle at the end of every lite rev ..but a couple of day ago i think i blew my cat out and possibly the resontor also can the stock down pipe and cat hold the boost.....and what r u supposed to boost at with that pulley?????????
The stock cat and res will hold stage 2 boost fine, i have put 19+ plus threw mine, the cat just got really hot.
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From: los angeles
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From: Harker Heights, TX
If you have Stage 2, with everything else being stock, you should hit ~16 to 16.5psi with a 2.9" pulley. Should net you ~10whp over the stage 2 pulley. And as I said before, Nate's pulleys look so damn pretty. 
If you throw a 2.9" on a stock SS/SC, you will still top out at about 12.5psi. The engine will automatically bleed off any boost over that. The stock injectors really don't provide enough fuel for that level anyway.
If you throw a 2.9" on a stock SS/SC, you will still top out at about 12.5psi. The engine will automatically bleed off any boost over that. The stock injectors really don't provide enough fuel for that level anyway.
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From: new jersey
get the dual pass end plate, and the pulley.
how will you be tuning it? i think the code is only for 1 vin #
how will you be tuning it? i think the code is only for 1 vin #
Last edited by chevysalesman614; Jul 22, 2007 at 07:54 PM. Reason: Automerged Doublepost
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From: florida
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From: Harker Heights, TX
No Onyxd, 2.9" is the smallest you can run with 42# and no blow up your car. Though I would suggest getting someone with HPT to do a scan or use an Interceptor gauge to take a look at your knock and if your car is running crazy.
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From: st.louis
You can run a 2.79" and be safe on 42.5#'s, i dunno what the GM injectors are like, i know their 42's but i think the lucas ones are actually flow tested at 45 l/bs, i could be wrong though, but i know on the lucas ones with a good tune you can run a 2.79" and be safe. Also it all depends on where you live and what your weather is like when your running more boost. If its cold and you lean out then add some more fuel, if its hot out and your running rich, take some fuel out. With stage 2 you can run a 2.85 and be totally safe.
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From: South Carolina
literally no , the stage 2 tune runs so rich that if you went down to a 2.9 it would just lean out the tune a little , but in my opinion spending 50 dollars plus shipping to run a 2.9 is a complete waste of money , get a 2.7 and a custom tune and 60 lbers , thats worth it , 1 lb of boost is not
Last edited by Red2.4SS/SC; Jul 23, 2007 at 10:45 AM. Reason: Automerged Doublepost
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From: North East PA
I would assume that if you change the pulley after the Stage 2 is installed that will void the Stage 2 warrenty. I figured you could allways put the stage 2 pulley back on before service but I thought those bolts would let them know if you have changed the pulley or not.
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From: Still fixing others mistakes.
depends on supporting mods really.
well in my case. i have the magic touch
so my 42's and 2.8 is happier then just a stage 2 alone.
as for people just throwing pullies on. seriously. you need to think about what you're doing.
"YaY more power"
not exactly. it's not always going to be 63 degree's out. your iat's will never be exactly 90 degrees after the blower. you will not always be on 94 octane, which the stage 2 kit is designed to run. in a perfect world this is possible. the world is not perfect. please keep this in mind when changing pullies. i can show you datalogs that will scare you
well in my case. i have the magic touch
so my 42's and 2.8 is happier then just a stage 2 alone.
as for people just throwing pullies on. seriously. you need to think about what you're doing.
"YaY more power"
not exactly. it's not always going to be 63 degree's out. your iat's will never be exactly 90 degrees after the blower. you will not always be on 94 octane, which the stage 2 kit is designed to run. in a perfect world this is possible. the world is not perfect. please keep this in mind when changing pullies. i can show you datalogs that will scare you
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no do not run a 2.8 on 42lbers , the smallest pulley you can possible use to keep the idc's below 100% is a 2.85 and even that is cutting it really close , like i said , i feel this from experience , a cobalt with a 3.0 pulley and a really good tune will walk a cobalt with a 2.85 pulley and a stage 2 tune , what does that tell you , spend money on tuning not more boost
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From: Still fixing others mistakes.
thats a loaded question actually.
you have to pull timing out of the car to run it safely. the 2.8 will lean the car out. every car is different, so how much is unknown. you have to find that out via a wideband.
now, with pulling timing out, the egt temps go up. same with pulling fuel out.
there is a safe zone that you can run. aluminum does funny things above 1600 degrees. they usually are not good things either.
this is why there are things called supporting mods. you need X to run A to make Z happy, while keeping Y in check. im not here to say don't do it, im just giving you fair warning.
thats not entirely true.
you have to pull timing out of the car to run it safely. the 2.8 will lean the car out. every car is different, so how much is unknown. you have to find that out via a wideband.
now, with pulling timing out, the egt temps go up. same with pulling fuel out.
there is a safe zone that you can run. aluminum does funny things above 1600 degrees. they usually are not good things either.
this is why there are things called supporting mods. you need X to run A to make Z happy, while keeping Y in check. im not here to say don't do it, im just giving you fair warning.
no do not run a 2.8 on 42lbers , the smallest pulley you can possible use to keep the idc's below 100% is a 2.85 and even that is cutting it really close , like i said , i feel this from experience , a cobalt with a 3.0 pulley and a really good tune will walk a cobalt with a 2.85 pulley and a stage 2 tune , what does that tell you , spend money on tuning not more boost
Last edited by Area47; Jul 25, 2007 at 05:52 PM. Reason: Automerged Doublepost