As far as i know my balt never had a stage kit put on it and only has a Injen intake... How much boost should i show at redline? Im pretty sure i hit about 16psi its a little hard to watch the pillar and not bouce off the rev limiter at the same time. 2007 ss/sc by the way.

 

16? go look at your pulley. does it have screws in it?

12.5 is stock.

 

Oh fun, well its 3am so im going look at any pulleys at the moment. 12.5is stock at redline? i hit 12.5 around 5k at wot in the right gear.

 

He's right. 12.5 is stock. I have a stage 2 with basically full bolt ons and what not and my boost is at 15 until it creeps up to 17 from 6500-7000rpms. You've got something fishy going on. GM Stage 2s peak at 15psi.

 

my last balt did the same thing, then it blue up with the gauge started pinging at 20+psi due to a broken waste gate or bypass, w/e superchargers use. i dont know if this helps but here is a engine bay pic

 

over the years many ss/sc owners have had increased boost levels due to a restricted convertor

from your pic looks like a large, black pulley...stock but not sure

 

is that a problem? extra boost is great , blown motors are not. how much can the lsj hold stock?

 

ya, a restricted cat is bad

the extra boost from a bad cat is causing a higher boost reading becaus the spent gases can not exit the conbustion chamber/head effectivley.

this type of "extra" boost causes exessive heat, knock retard, poor performance and poor mpg

 

stupid me, i knew that -__- for some reason i was still on the malfunctioning bypass/wategate issue. do yuo really think i have a clogged cat at 7k miles? Im not even sure its the stock exhaust i havnt been able to get under it yet, does not seem to be the stock muffler.

 

its just an idea and something to check

there is an 8yr/80,ooo mile warranty on emmisions

if you have a warranty have your dealer check your symtoms, aka higher boost levels, and ask them if they will check for proper exhaust flow

that is my suggestion

 

Ill attempted this, when i brought my last balt in for a clogged cat they asked me how i knew, i told me i was getting like 16mpg and it sounded like ****, they told me it was find. then i brought it there for boosting over 20psi, and they told me to drive slower till the part comes in, it blew up on the way home, i got a letter in the mail 2 months later telling me they part as arrived at the dealership. woe is me, but ill go and try haha, first ill check for screws in the pulley, and how else can i tell if it had a stg2?

 

black injectors instead of the bright green injectors, 7000 rpm redline

take it easy on it until you get it at least checked out


insist on getting it pyrometer tested and flow tested....because you had one blow up before ya know?!

good luck, going to bed peace

 

thats for the help, later.

*note, ive seen that the new flashes for stage two are back to the stock redline, not 7grand

 

lucky for those with 12 lbs stock i hit 10 when i was stock haha

 

interesting about the s2 reflash to stock redline.

wonder why they did that?!

did you check your pulley and stuff?

i went the stage 1 and pressed a 3" pulley on ....saw 15ish and 6900ish redline

stock was 12-13ish and definately 6500revs/redline

 

Green injectors and stock pulley, i set up a vid and pointed it at the boost gauge, 12.5psi three pulls and 14psi two pulls. Found a cool guy at a performance chevy dealer said my exhaust flow is perfect and my boost is fine. He said its normal/im lucky that it spikes to 15 sometimes and not to worry about it.

 

Well good deal. alls well that ends well. Good you found a cool dude to confide in. They can make stuff happen for the bast on your ride.

 

hmmm my ott stage 1 peaks at 20 psi. when i was stock i was also hitting 15 psi...plus a clogged cat smells like ass its a good way to tell if it is or not.

 

I only hit 10lbs stock...if its really cold outside I hit the 12.5, but it's gotta be below thirty. And no, I don't go racing stupid ppl in that cold of weather, but I do have a lead foot and a short temper so slow ppl get passed lol

 

MIKE, if you want a 3" pulley give me a pm. I'm in Barberton.