Well Ive seen my boost go higher then normal sometimes. I swear ive seen it go over the 14 mark and almost make it to the 15 mark before. Here is a video of it boosting at almost 14. Is this normal? All I have is a exaust on my 06 ss/sc. Where do you guys/gals boost at?

http://home.comcast.net/~xenozx/MOV018211.mpg

 

exhaust can do wonders on a f/i car

 

A better flowing exhaust will not help you make more boost. In fact, almost any mod besides a smaller pulley will usually cause a drop in boost. Because most of the boost comes from restrictions in the intake/exhaust.

Losing those restrictions may drop boost, but won't hurt performance by droping boost. Its more effecient boost, so it is still better, even though it may be a little lower.

But that could be why your car seems to put down higher numbers than other similar cars.

 

The cold weather will also cause your boost to go up a little bit. During the summer I would see around 11 psi but now my gauge will read 12-13 psi

 

i normally get about 15

 

I'm gettin 14-15....

 

Since it started gettin cold I've been gettin about 9300 KPA instead of a test from stock 8300. I've been told this is called boost-creep. It happens when the wheather get cold. Apparently not a good idea to always be on the boost when this happens.

 

Its so cold here my car (not a cobalt) is now running an ICE AIR INTAKE "IAC"

Cold air though seriously is great

 

Cold air is more dense than warm air. When it's cold out, the SC is able to get more in verus a hot day. Your numbers seem dead-on for what i see on my Impala in cold vs warm/hot.

Don't listen to the boost stack crap either, i proved that therory wrong a year ago

 

I only get 12.5
But whoa you definitely hit 13.5 psi

 

Switch to a mechanical gauge and see if you get the same results. We’ve had this debate many times here.

 

I agree with the theory of the temperature. Mainly because in the summer it used to hid exactly 12.5 lbs of boost. I did get my exaust and spend more time looking at my RPM then my boost gauge. The other day I was drving with my friend and he was like dude what do you boost? I told him 12.5 and hes like "your practically hitting 15 now"

It was on a cold night. Sounds to me like the temperature is just causing me to boost higher, easier to cram cold air in then hot air, makes sense.

as far as the stock meter being wrong I highly doubt that. Ive heard "It cant go higher then 12.5, its limited to that" who ever said that is dumb. Anyway IM practically up to 15 and the gauge is from a very reputable company, so I doubt it is incorrect. Its possible, but I still highly doubt it.

I find it much easier to believe the Hot/cold theory then the boost gauge is wrong one....

 

I got a 2.85 " pulley and am almost boosting to 12. I guess i hit it in third. I can't imagine what it would be like at sea level

 

Lucky bastards..I only get 11-11.5......Even during winter

 

I'd give up the extra boost to not have to deal with snow. You win in the end, lol.

 

Man i have the same problem i took it to the dealer i work at and we looked at it .... ur boost solinde is bad we dont know why yet we are looking into it but thats seems to be what it is .... u get a Mass air flow code.... and a cam shaft performance code,,,,

 

IM not throwing any codes?...

 

Moved to _2.0 PERFORMANCE_

 

"Boost creep occurs when the wastegate/turbocharger combination is improperly sized and cannot dump enough exhaust gasses. The symptom is rising boost as RPMs rise, sometimes in an uncontrolled fashion. To reduce this effect, either install a larger capacity wastegate, or an exhaust turbine with a higher A/R ratio."

I don't think you guys can have boost creep.

It may, as has been mentioned, be due to the air. Colder air is thicker.

 

But ah superchargers dont run off of exaust gas, they run off a pulley.... Smaller pully more boost.... higher pulley less boost....

 

Im 15 in 2nd gear 16.5 in 3rd and a grand spanking 18+ in 4th. Ahhh....... I loving not being stock any more. Oh yeah winter time cold air is helping me out too.

 

Do you disable the boost bypass selenoid properly ?

 

I have not tried to disable it yet. I'm at 7000 ft above sea level, stock i was getting 6.5 PSI so now i am nearly running stock boost, I'm going to go to albuquerque some time soon and i will probably get over 12.5 so i will do the boost bypass then.

 

Just disable it right now damn !

 

I won't get any more boost though, i get 12 at the very top of third at about 6350 RPM's