I have the Trifecta Tune and I usually run 22 lbs. of boost and today i was running about 18-19, any concern? Boost Leak?

 

Temperature change?

 

High 80s

 

check ur intake

 

What would I be looking for on the intake?

 

warm weather = less boost.

 

warm weather doesnt mean less boost neccesarily.

check if ur filter is dirty...or something got caught in the manifold.

u have a stock intake right?

 

I have the trifecta tune and was hitting and holding 21psi today. 93 degrees here. All I have is the K&N drop in.

Check your piping and intake.

 

I have the Hahn CAI

 

Not only temp, but humidity also.Being in Florida I would assume humidity would be more of a factor than in Jersey.During the hotter more humid days in the summer my SRT 4 would lose boost regularly.

 

oh i got a hahn too

CHECK YOUR VACCUM LINE IF IT CAME OFF!

this is what i did to my hahn intake ot keep that vaccuum line from coming off

 

I just looked at my charge piping and it is relatively movable, maybe a leak somewhere idk but it wiggles pretty easily. Normal?

Also, I am missing a peice on my intake breather assembly but I thought I jerry rigged it good enough

 

yeah the plastic tubing is flexible for the motor. if you get a tune. you need CP

i need some soon

 

It is cheap mass produced crap.

 

term u like my jerry rig?

 

Hey if it works. Good idea. Better than electrical tape IMHO. If you get a chance remove the braided metal line and replace it with a thick 3/8" rubber hose and two hose clamps.

 

show some pics man

 

Negative. Just the opposite.

It's about density altitude:

Warm weather, high altitude, or low pressure all mean higher boost needed to hit its target.
Cooler weather, lower altitude, or high pressure all mean lower boost needed to hit its target.

This is because the lower the density altitude, the denser the air, and therefore the more air your engine naturally breathes without the need for boost.

If you're at the top of a mountain (higher density altitude), then the air's thin up there... which means the turbo's going to need to work harder to supply the engine with the same amount of air needed to hit it's target. If it's below freezing, by the beach (minus the humidity as this ups density altitude), and a high pressure front blew through then your engine is probably loving it and little boost will be needed.

On that note, should you turn down boost in the summer? Maybe. This is because of the increased risk of knock as temperature of the air going in/out of the turbo increases due to intake temp going into the turbo being higher and therefore temp of the air coming out of the turbo also being higher (one of the reasons I upgraded the IC being here in Houston).

 

I have Dejon's SRI. But I guess it is the same principal.

 

Just threw a CEL, running lean at idle speeds could that be the problem?

 

cold air DEFINATLY = more boost.... when the air hits the turbo and intake and heats up, it expands, causing more pressure.... its why you have an intercooler in the first place.. cooler = better

 

You've got a small leak somewhere, probably after the MAP sensor. At idle the car is in vacuum...it's sucking air in thru the leak, it's not getting monitored by the MAP and it's causing more air to enter the engine than there is fuel to mix with it which causes a leaner mixture than should be.

I say after the MAP because the MAP sounds like it's unaware the air is entering so it's unable to compensate and add more fuel. I'd check the breather hose and all fittings on all intake tubing, probably start at the fitting on the throttle body.

 

CobaltSS.net your number 1 source for misinformation...

 

Misinformation they themselves probably made up. I have never seen a post with that misinformation before.

 

i thought with the tunes it runs the same psi no matter what, if you were stock i'd say that the weather has something to do with it. and colder weather = less boost... i live in cleveland and i would know about temp change lol and when it was winter i was boostin bout 11-12 psi and now that its 85 out i'm boosting bout 15-16