Experienced this today

[T- Type Tim]

Was about 20 degrees cooler out and noticed about 3-4 lbs of psi loss




http://www.supraforums.com/forum/showthread.php?653153-Air-temperature-effect-on-boost-pressure

 

[Mr.Spool]

Usually pickup more boost on a colder night.

 

[T- Type Tim]

I had some weird things going on with the car
Had a baseline tune in it and did not realize it till the next day
Got me thinking about the temp fluctuations (atmosphere ) and how it could effect boost.

 

[Mr.Spool]

I've run a lot of combos literally at max heart rate and in the colder air i see boost go higher.must have something going on.

 

[Pronto]

Going lean i bet. I have always had to add fuel in cool weather.

 

[~JM~]

Air density.

 

[earlbrown]

Air pressure is not a fixed item. Same reason you have to add air to all your tires when it gets cold outside.

An interesting thing I noticed today... I installed some pistons into a block a little over a month ago when it was chilly. I used a large plastic potato salad container to hold some oil for the rings and wristpins. It's a little over 80F now and the internal pressure inside that container had the lid bowed up like a drunk meth addicted redneck. Same amount of air in there when I put the lid on it. Same amount of O2 as well, it's just bigger now.

I'm actually pretty impressed with that piece of tupperware. It's held that pressure for quite a while.

 

[Boost231]

That potato salad is amazing

Sent from my SM-G935T using Tapatalk

 

[dank GN]

If you have a manual boost controller with the old school spring and ball just about all of them the colder it is you should see a slight increase in boost pressure at least that’s what I’ve seen with my setup