cobalt8

So I had my stage 2 installed, im running GMPP exhaust, GMPP stage 2, and JBP CAI.

Im hitting around 10 PSI of boost, is this low?

06' SS2SS

That is low for a 3" pully.

cvenom2122

you hsould be hittign 12.5 stock to answer your question i think stage 2 make you push 16 psi

blown06

I just had mine installed and I am hitting 15psi

toydriver00

I hit 12.5 consistantly, pushing the car at about 6000rpms, I hit 15-16psi

Animalchin

Dont forget as you open up both the intake and exhaust air ways the boost will drop.

cobalt8

Ah, ya I havnt gotten to the top of 3rd, this is just in 2nd at about 5-6000 rpm..

I will have to go on a highway tomorrow and try goin higher in 3rd..

BTW, cvenom2122, you are wrong. Stock PSI is 8 lbs.

codyss

Your kidding right?

StinkBOMB

p7x

WOW. Stock PSI is 12.5

I saw 13.1 stock and 16 with S2 and now 18 PSI @ redline with the 2.8.

Allshot

With an intake you actually gain some boost but with an exhaust you loose some. I still see about 17-18 with my 2.8. Take your car to 6500-7000 Rpm in secong gear wot and let us know. 10 Psi is pretty weak.

MacG321

he probably doesnt even know how to read the boost gauge with this comment

Spite4U

What are you getting in kpa? It should read ~100. That is roughly 14.5-15PSI. If you installed the kit yourself have you been to the dealer for the reflash? If the dealer installed it, was it their first time?? Sounds like the new calibration is missing.

rickyw

ummmm MY car is still stock and i see 11.5 in second gear close to redline dude i think you need some glasses oooorrr you may want to go check out the dealer and get it taken care of. even chevys site says 12 psi STOCK

SSinPhilly

8 lbs of boost gezz please stop posting

M-Dub

Yeah, I get a little over 12 psi on mine... and it's bone STOCK! Someone doesn't know his numbers yet, go back to preschool!

DTM2188

Not to change the subject, but I see 17.5 right now. I am adding the GMPP exhaust shortly and headers and a downpipe in the near future. How much of a drop in boost will I see? Does that mean that the performance gains from the exhaust, headers, and downpipe won't be felt due to the loss of boost?

Animalchin

You are right you will gain boost with an intake. Sorry I was mistaken.

When adding an exhaust the air flows better so the amount of boost will drop. You will not see la loss of power unless you put an over sized system on. or do not have the supporting mods

SpecialK

Yes Animalchin has it right. The SC is flowing the same volume of air into the cylinders. It's just not having to force it in as hard with a better exhaust, so boost drops. But your making more power because you have less backpressure.

DTM2188

Thanks for the info.

Biffno3

I was 12 psi stock. K&N Typhoon CAI made little difference, maybe 12.5 or 13. The Stage 2 I am hitting 15 to 15.5 psi.

WarlordSunTzu

I have a 3" exhaust. How would this affect my performance?

Animalchin

Look at it this way. You are now letting air out faster and easier. BUt you still have the stock air box. If you get a CAI you will see a nice performance gain. Engine modifications help each other in respech to HP gains. You want to let the engine breath better both in and out. ONly doing one will give you some gains but do both and you will see much better gains. This thread started about Boost #s with the Stage 2 kit. And moved to adding an exhaust or intake and what they would do for your boost. If you added the stae kit to your car you would see less boost then me but you would have higher hp and trq numbers. Haveing higher boost numbers doesnt mean you will always have petter performance over some one with less boost.
Sorry for the long post and hope that helped

JohnfromVA

Even if you punch it for like 2 seconds you see that it goes way past 10... Lucy!!!! You got some explainin' to do!!!

cobalt8

I dont know how you all are hitting 12 stock.

I took it out on the highway, I hit 10-11 PSI with gmpp exhaust, jbp cai, and gmpp stage 2...

Stock i was hittin 8 psi.