Temperature and HP
 

I drive a stock 370z. I noticed a measurable change in HP when temperatures recently dropped from 85ºF - 100ºF to 65ºF - 80ºF.

I know the stock Power is (SAE) 332 hp @ 7,000 rpm; 270 ft lb of torque @ 5,200 rpm in a perfect world.

What would be your guess for HP at 65ºF and 100ºF for a stock 370z?

650hp

333, 315

I'm saying the engine will produce, not WHP, OP said the car makes 332HP, which is at the flywheel

And I'd like to edit my answer

In all seriousness, I'd expect the manufacturer's numbers for the car to be accurate at lower temps, and the car most likely makes much less power than stock at 100 degrees.

Yeah, and 65 degrees isn't that cold, especially if "room temp" is 68 degrees

Texas
 

100ºF+ Its very noticeable drop in power. Oil temperature gauge gets about 220ºF max but the radiator stays perfectly in the middle.

...

http://www.the370z.com/nissan-370z-g...loomy-day.html

:tup:

Of course. Hot air makes far less power than cooler, denser air. I would expect that the numbers claimed by Nissan are best case scenario numbers, and you give up a lot of power in the heat. How much exactly? No one can tell you.

DE- ok deleted reply so you can edit your power rating...

Lol, you didn't need to, I already edited it :)

oh, i thought you wanted no history of the edits. :icon17:

The ECU starts limiting power when the Intake Air Temperature gets to ~85-95 F. You are not gaining power at lower ambient temps, the ECU is restoring normal operation. The question should be: How much power am I losing at 100 F? (My answer is: I dunno.)

How much power am I loosing at 100ºF?
 

It feels like 25 hp.

How are you estimating that? The only real way to figure it out would be to dyno the car at 100 degrees, and add back in the drivetrain loss. Even then, it wouldn't be 100% exact.