Enjoy the Cold Weather Performance!

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tbm5690

tbm5690

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For those like myself in the great white north, I do enjoy WOT runs on the extremely cold days, such as those accompanying this "polar vortex"... -12F currently. For those not aware, horsepower in NA engines typically increases or decreases by approximately 3% every 1,000' deviation from sea level. The density altitude here this morning was about -3,300' or so...pretty impressive.
 
The trouble is while I get more HP, I also get less traction...so when I struggle for traction on a warm sunny day, it is impossible to find any traction on a day here in Iowa where the high is 1F
 
Lyman said:
I owned a Harley once that ran great in the cool mornings going to work. In the afternoon going home it didn't run near as good.
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This explains why my old bike ran great during the 6am commute to the office.
But on the 3pm drive home at +90F, it was a total dog!
 
DriveHard said:
The trouble is while I get more HP, I also get less traction...so when I struggle for traction on a warm sunny day, it is impossible to find any traction on a day here in Iowa where the high is 1F
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There is only a 1200 ft difference in elevation across the whole state, how much traction do you need... j/k.
 
Jimmy_Russells said:
This is especially true with modern turbocharged engines
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Sadly except Mazda. My one complaint is that they eliminate boost below 20*F, below 3rd gear. That said, I got sideways a plenty on the way home yesterday morning, and had some real stress crawling up a hill with all 4 tires scrabbling, at 2mph, past what looked to be a stuck state trooper's Charger. The electronic nannies in this car are absolutely insane! But I could do without t he boost cut.
 
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tbm5690 said:
For those like myself in the great white north, I do enjoy WOT runs on the extremely cold days, such as those accompanying this "polar vortex"... -12F currently. For those not aware, horsepower in NA engines typically increases or decreases by approximately 3% every 1,000' deviation from sea level. The density altitude here this morning was about -3,300' or so...pretty impressive.
Click to expand...
I don't seem to get the point of or what there is to gain with WOT's in the extreme cold temperatures.
 
I wonder how much of it is offset by colder tires being less flexible and higher driveline losses due to thicker oil & grease. Going to guess the increase in air drag (due to more dense air) is not a factor here, not at normal speeds.
 
boosted engines generally see a quicker boost the colder it is + even a little more, BUT those with ENHANCED tunes see bigger differences!! bigger free flowing exhausts boost quicker ALL the time air in air out + if you have a boost gauge its easily confirmed. its all about your ECU programing + the info your sensors send to it but there are "tricks to fool the ECU!! a good pro tune-chip that adds fuel as well is best because a too lean mix can burn HOLES in the pistons!! todays DI engines can + do boost more + faster safely than my port injected 2001 Jetta + now a 2001 audi TT + take a look at GoAPR for an eye opener what the VAG-volkswagen auto group engines can safely do with enhanced tuning!!
 
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Yea I've noticed nothing in the Tacoma, other than less fuel mileage. Same thing with the Camry, no performance gain. Still as fast as a snail with a hard on... :LOL:
 
I think the vehicles you notice it most on are the ones with mediocre cooling systems that aggressively retard timing. The LS1 F-body is an excellent example of such a car.
 
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