hopeing the tech people will have input into this.

how bad does this hot and humid weather effect turbo cars?

obviously charge temps would be higher than 'normal' if your not at speed but just how much does this effect the performance of the car?

just wondered!

 

Theoretically, the air is thinner when hot, so the efficiency of the turbo diminishes as there is less oxygen per volume of air, hence a reduction in power IIRC.

Then again, I am not a "tech person", and everything I've said this week has been rubbish... so who knows, this could be just as good gibberish as any

 

i see, so it would be noticeable difference in this weather then?

i guess that depends on how you drive and the spec of the car too?
IE:cars with more efficient coolers might not suffer QUITE so bad etc.?

 

Car felt slower yesterday when I popped out for a quick razz. Water temps climbed very quickly as well so didn't dare give it full beans.

 

yeah, this is kinda the reason for my post,
i thought the car was noticable slower today too, lol..

 

I've found an easy cure for my car feeling slow. Take the Audi out before getting in the RS. Always makes it feel 100 times faster than it really is

 

Went to one of the rolling road sessions at Nobles about three years ago (Day Before National Day) with Dingy, and a load of other cars. Ended up as being one of the hottest days of the year, and questioned the operator as to how much bhp we could expect to loose due to the high temps. He told me he could expect particularly the tubo cars to be anything up to 5%. down on the power they expected due to the hight temps. In addition the ecu will retard the ignition when the acts go too high.

 

My starter died today lol,had to wait a few mins for it to cool down

 

your car will always run a lot better on a cold crisp morning rather than a hot sunny afternoon, the colder the air the more dense it is , more air equals more power.thats why some intercoolers are better than others. cheers nomad ps never could understand why they have 10 of the best on one of the hottest days of the year ? would be a lot faster in december

 

my fans were strugling to cut out this afternoon as it was very hot here, also seen drop off in oil pressure as well.
anyon else having any issues with this hot weather??
thanks
oriont

 

I wonder how good TOTB would be with rain or ice on the track... fancy driving at close to 200mph with rain lashing on the track, I don't think so...

 

Car didn't have the usual "kick" this week...

Should be a tad better today as its cooler... but then I can't go for a drive today!!

 

Both mine drive like crap in this weather, it Feels a bit like towing a caravan

Cheers

Steve

 

Hotter = slower

But the humidity helps cancel it out a bit (latent heat of evaoporation of the water droplets as its still actually in liquid form not gaseous when in the air believe it or not)

 

Really does effect them. Seem ok to about 25 degs ambient, then things get worse. Water gague is at halfway on the mway, and when u boot it, just doesnt seem to pull as hard.

 

mine noticably slower in hot weather hot weather can make a massive differance up to about 25 bhp in some cases
had my saff dyno'd last saturday(schorchio) made 363bhp
yet a month earlier made 383 same rollers

 

If it could rain and keep the ground dry, it would be perfect

 

ye big differance on mine in the heat.
i dont like it

 

them sunny but cold winter mornings top class drivin weather

 

Mine felt much slower too, especially after waiting for start to SS for long itme with engine running, the lunch wasn't very impressive. When intecooler cooled down a bit it was better.

 

Hotter humid air will lower power in more ways than one.

First is that higher ACTs will in most engine management systems force the car to run richer and ignition timing to be retarded.

Secondly, hot air is lower density therefore less air mass to convert to torque. The turbo will draw in this air and compress it to the set pressure, but still at reduced air mass.

Garrett test their compressors with 10 deg C inlet temps for reference. If you were to test it at 27 dec C, air flow out the turbo is less.

And also, the intercooler won't make up for this, an intercooler just removes temperature off the air flowed into it, it doesn't add any extra air mass.

 

what about a intercooler for the air entering the turbo then

oh and nomad as for TOTB in december, theres a ford daddy thrash on december but dont forget its foooooooking cold on a air strip , the wind chill in december at brunters is unbelivably cold

 

I second that. Went with SCC's Rob and their Focus th eother year and despite tracky bottoms under my jeans and 2 fleeces I was still freezing

Fookin good day though

 

i was wearing a fooking t shirt and a leather jacket , i had to hold a camera and had no feeling in me hands

 

Mine is suffering from the heat i think an RS500 IC is on the cards who's would you lot reckomend

 

It would be like a big metallic air filter.