Hot/Humid Weather = Lower Boost???

[NewTurboTuner]

Can anyone confirm if hot weather makes boost go down???

I ran at Pacific Raceways last night and it was 90'+, I'm sure the track surface was more like 120'+. It's the hottest weather my Talon has ever run in, and also the hottest weather I've ever driven a Turbo car in.

Strait off, I could feel that power was not as good as usual ....I did a run and my Talon was down about 3-4mph on the 1/4ml. I decided to log some runs, and saw that my boost pressure was down a little??? ....I normally run up to 19.4psi and I only saw 17.9psi in 4th ....other gears were even lower 1st/16psi, 2nd/17.4psi, 3rd/17.9psi. The lower boost in 1st gear dosent surprise me, but seeing lower boost in higher gears baffles me a little

.....I'm pretty sure I don't have any boost leaks, so I wonder about the hot humid weather and how it effects my car???


thx

 

[CanadianTSi]

Yes, boost will change with weather especially if your boost controller source is from the turbo/LICP.

 

[94Jettameowpsst]

boost will most always fall in hotter weather....i dont mean you will go from 25psi to 16psi but it will drop just because the air is less dense

 

[NewTurboTuner]

Good to know .....I feel much better now

I lost about 1.5psi, and 3-4mph in the traps ....it made me a little worried that something might be going bad, but the car was running smooth so I didnt know

Thanks Guys

 

[Defiant]

Hot air = fewer molecules. More water = less (usable) oxygen. Yes, ambient air matters a lot, and it's why the engine checks for it.