uhhh no the 2.7 billetflow doesnt fit on the GM Stage 2 hub only the CA 2.79, the TAG 2.79 , and the PB2.8 fit on the GM hub

 

SStud, I already have the exhaust on and it didnt drop my boost, I still push 12.5 pounds and sometimes see 13 pounds with the stock pulley.

 

You probably will be around 290 hp, but this will be at the crank. Your wheel hp will be around 250. But deffinately post up a dyno when you get it done.

 

I 2nd the 250hp mark. Just look at the graphs TAG put out. The car has what you are looking to put on and it is close to 250 wheel.

 

Oh oops I didnt pay attention to the hub part, but is Billetflow still make the best pulleys? Theyre supposed to prevent slipping or sumtin right?

 

i ran the samesetup for a while and trust me you will not see 275.... more like 245-255.. when i ran that setup i dyno 247 at the wheels and it got really lean in the top end of the rpm range so just be careful... the injectors that come with the stage 2 does not run well with the 2.8.. you will melt a piston or crack a intakemanifold gasket ... i cannot stress enough to you to run bigger injectors it will cause you less headache in the long run and you will see better results in hp and tq... oh just my .02 been there ,done it trust me

 

that's my question too...i have GM Stage 2 but at WOT I'm only running 12psi for some reason. My altitude is around 4300 feet, if that would make a difference. I think I'm going to throw on a Cry02 or Ntercooler setup for the summer btw, it was 3 degrees yesterday and my car ran like a raped ape. it seems even faster in low altitudes like when i was on temporary duty to texas...anyways, random rant.

what is the best pulley for the 2.7 hub? can i still run 91 octane? It's impossible to find 93 in Utah. i'm assuming that before I install the pulley, I"ll need 60lb injectors and a tune? is there a generic 2.7 tune out there, or am I going to have to buy HPTuners and AF meter and figure it out myself? all the tuning shops here are for mustangs, subarus, and hondas...and my experience in engines comes from my 1970 buick skylark which is nothing like today's computer-controlled engines. also...does anyone with the Ingall's TB have weird sounds coming from their right front? i'm trying to figure out if it's a loose strut tower or if it's the TB. I'm really new to this 'tuning' thing so don't flame me too bad. :P

 

Sorry to jump in on this thread, but will you really be running lean with a 2.8" pulley on the Stage 2, 45lb/hr. injectors, I was thinking you be dialed in right around stoichiometric
(14.7:1) but if you guys say lean, I'll trust it and be safe, anyone know for sure, like ran a 2.8" w/ stage 2 injectors, ran lean, and had to upgrade?

 

i thought the 2.8 wit the 42lbs but u at 90% duty cycle which was only at 7000 rpm and how often r u there? as long as u dont go over a hundred it was ok sorry if i sound like a complete ******* just wut i heard

 

i'm usually from 100-120 maybe once every two weeks (late at night with little or no traffic, i swear mormons have a designated bedtime haha). i'm thinking of taking it to bonneville in the spring just to get a top speed outta her. i've never been in a car capable of >140mph, I would love to know what it feels like.

edit: d'oh! i'm a *******. you were talking about 100% duty cycle. no, my rev limiter's set @ 7000 so I can't go over the supposed 90% if that's the case

 

The concesis in hear is that it is a car by car basis for the 90% injector duty cycle. If you are running a 2.8 on 42s you are asking for it if you are not carful. I ran the 2.8 for a bout 3 months and put ab out 10000 miles on with out issues excpet for having to deleat the p103 code that i would get at high revs. So for me I stayed in the mid rage of the RPM but know I want the full range so I am going with the safer setup that TAG is putting out. Better safer tehn surry.

 

what is the p103 code? Is it like running to lean code?


Cobalt Addiction states that a 2.8 pulley and stage 2 injecters (42lbs) are perfect, and if you go 2.7 then you need the 60lbs. So I think I will be fine and I kno of other people on here running the same setup and they havent had problems either.

 

Depends on your elevation too I heard. Im not sure at which elevation that it's ok to run that setup, whether it's higher or lower (i forget). I was told that, at my elevation, I'd be ok. Im just a few hours north of Calgary, Ab. 2970ft above sea lvl

Can anyone else verify my info ???

 

I remember readin a while ago that ppl were runnin 2.7 wit 42lbs injectors and thought it was safe. The injectors dont max out at 100% duty cycle. They max at, i think, 140%, but that doesnt mean its safe running them. This isnt what i think, its what read a couple months ago in another thread.

I would jus run a 2.7" pulley wit a new hub and 60lbs injectors because you might as well go a lil smaller if ur gonna use 60lbers. 2.6" and 2.5" is pushin it in my opinion.

 

Im not going to change the injectors, and Im stickin with a 2.8 that I have. I dont think Im gonna mod my car anymore then what I have now, besides getting my stage 2 installed tues with the 2.8 pulley. Thanks for everyones help.

 

Injectors go static at 90%. 100% and they never are commanded closed, 90% and they never are fully closed.

P0103 is a code for a cylinder 3 misfire I think. P0100 is a general misfire and p0101 would be cylinder 1, p0102 cylinder 2 and so on.

 

p0300=cylinder misfire; p0301, p0302, p0303, p0304 denotes specific cylinder.

 

thanks for the clarification

 

P0103= MAF sensor high frequency

 

Thats right, I'm thinking p0300 codes.