CbYellowSS

I have heard that you dont run at full psi until about 3000 miles is that true???

im at like 2250 and i was only running 11 stock and now im running about 14 with my stage 2 kit on

arent u suppose to be running 15.5 with a stage 2 kit?

toydriver00

I see 15 with the stage 2 kit (at about 6000-6500 rpms) . It really depends on weather too.

Cobalt_SSTuner

iTrader: (1)

I run 11-12 psi stock at WOT.

CTCOBALTSSS

Yeah it depends on elavation, weather and other things. I wouldn't worry at all.

sealy

1,600miles and im only at about 10.5 but i've been nice to it recently because i was planning to take it in for clutch warnentee work.

darrend3

i have 1500 miles on my cobalt ss and when i got on it with around 1000 miles it was only getting 11 to 11.5 psi it was also 95 degrees outside with humidity i live in austin

NightmareRacing

yall forgeting you are dealing with a belt driven supercharger, the faster it turns (thus the faster your motor turns) the more psi you will get. Don't expect to see 12psi at 3000 rpms, rather, you'll see that around 5k and up.
You can test this, get in 5 gear at 2000rpm and snap the throtle, it'll go to maybe 10, probably more like 8-9 then as teh motor speeds up so will the psi.
IF we drove turbo cars, there are way to get full boost sooner (such as retard box combined with rev limiter that heats up your exaust and get the turbo to full psi or just about off the line). Turbo will generally give you full boost sooner because they are driven off exaust temp, so (lag not concidered of cours), as soon as you snap that throtle your EGT goes up fairly quickly, hence giving you more boost...

and yes it is "normal" to have that weird break in period for boost where you don't see full boost until some mileage is put on...Lightnings were notorious for that...

zinner

The milage limit and the boost pressure I beleive is a myth.

NightmareRacing

limits yes, but if you think about it, even when you first fire up and brand new motor it won't make peak hp until a couple passes on the dyno or track (or a few miles) or until the rings seal perfectly....so that could be just that for the blower, it has to "wear in" aka "break-in" for a little bit...(just hypothesising)

CbYellowSS

well i have heard that some people only start out running like 9-10 psi at 6000rpm + and then eventually get to the 12.5 that they are suppose to

OniMirage

mine was just slightly over 10.5~11 for about 5k or so miles then it was always over 12.

then I got stage 2 and it was always over 15 but took some time to get there (spark plug issue, got it fixed and got there much faster) now it's always over 16 with my intake. yeah the last part doesn't really apply to the thread but oh well.

CbYellowSS

wow it took 5k miles to get full psi???? so new spark plugs helped for u??? if so what spark plugs and around how much were they?

OniMirage

the plugs were only needed after I got stage 2 and were purchased because of a huntch that the old plugs were f#ckered up and the huntch was right. ngk brk7e's about 10 bucks

jermapple

hey onimarage have you ran 1/4 mile?

OniMirage

14.6 stock in november last year and I have yet to get out of that spot even with stage 2 STUPID SPARK PLUGS AND ARIZONA 100+ degrees nights. though I have yet to go back after getting the new plugs installed and adding the intake.

jermapple

a guy that owns a tune shop down the road from me has one that ran a 12.8 with limited traction. he let me take it for a spin yesterday. it was the most amazing thing ever. mine is still stock.

OniMirage

is he on the stock tires still

jermapple

that was with slicks. theres a pic at hoosierperformance.com . hes running like 20 psi. he claims it to be the fastest in the country.. at least with the stock motor and tranny

CbYellowSS

about ten bucks each?????

where u get them at?

toydriver00

They are $1.77 each at Advance Auto.

OniMirage

10 bucks for the 4 of them together. I bought em at cobalt-addiction ... not the best experience but they came in ... eventually ... you can get em local for the same price after tax or cheaper if you know someone

CbYellowSS

if i buy them do i need to mess with the gap any???

OniMirage

yes .40 is the stock setting and should be used all the way down to a 2.8" pulley

edit: the plugs are not set to .40 when you buy them

CbYellowSS

k thats fine.... thank you and how much do u think they help??? u say they are necessary with a stage 2?

OniMirage

If the gap for each is wrong or the plugs are full of build up it could cause the car to pull timing which would affect the cars performance. They are needed for stage 2 cus they cool off faster than the stock plugs