PersianPower

For the past 2 days (or maybe 3) It's been hot as hell in Toronto (not that I mind it more than the winters) and its been very humid. It maybe just cause I wore sandals these days that I dont hit the gas pedal hard enough but it seems that the car's a bit sluggish..

Is it just my paranoia or does the weather affect the performance?

dolbnyc

In the winter there is more cool dense air,
better a\f mixture

Summer time, you get less air density, heat soak
on the turbo and intercooler from sitting in traffic, combined with a lower initial compression ratio, (for the turbo)

A turbo compresses air, heat is generated as a result, so if you are compressing hotter air, then, you get less out of it. winter rules

you notice it more with a turbo, then a normally aspirated car, but they are all slower
in the summer

AudiAddict B7

The intercoolers heat soak faster which means the charge air is hotter. The ECU will pull timing to avoid detonation.

PersianPower

Thanks

FlaD

I live in South Florida, and no problems here. But then again, I have yet to drive mine up north, nor will I ever! I got sick of that weather!

skotx

For those with the means to monitor Intake Air Temp, what do you typically see on a summer day while in traffic and in stop-and-go? Anyone know what the pressure drop is across the stock IC?

With the front-mount IC on my RX-7 I see low 40s celsius on the highway and mid 50s on the road. Unfortunately our IAT is mounted under the manifold and heatsoaks like crazy when the car isn't moving.

-Scott

JimFerraro

Go to the track on a cold night, then on a hot night.

psuaudiguy

i feel my car is performing much better now than it did all winter (i live in south eastern PA). gas mileage is up, and i feel like im quicker off the line (completely stock)

PersianPower

i feel like my gas mileage is up too, but performance is meh...

psuaudiguy

what kind of temperatures are you getting up to?