Temperature and HP

Troyz · 09-23-2013, 08:54 AM

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?

kenchan · 09-23-2013, 08:59 AM

650hp

DEpointfive0 · 09-23-2013, 09:00 AM

333, 315

DEpointfive0 · 09-23-2013, 09:04 AM

Quote:

Originally Posted by kenchan

can't be that high, DE.

lol

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

Chuck33079 · 09-23-2013, 09:09 AM

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.

DEpointfive0 · 09-23-2013, 09:13 AM

Quote:

Originally Posted by Chuck33079

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

Troyz · 09-23-2013, 09:20 AM

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

Quote:

Originally Posted by Chuck33079

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.

enkei2k · 09-23-2013, 09:21 AM

...

WTF, Z drives amazing on gloomy day

Chuck33079 · 09-23-2013, 09:25 AM

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.

kenchan · 09-23-2013, 09:29 AM

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

DEpointfive0 · 09-23-2013, 09:31 AM

Quote:

Originally Posted by kenchan

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

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

kenchan · 09-23-2013, 09:35 AM

Quote:

Originally Posted by DEpointfive0

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

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

SouthArk370Z · 09-23-2013, 09:48 AM

Quote:

Originally Posted by Troyz

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?

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.)

Troyz · 09-23-2013, 12:09 PM

It feels like 25 hp.

Quote:

Originally Posted by SouthArk370Z

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.)

Chuck33079 · 09-23-2013, 12:11 PM

Quote:

Originally Posted by Troyz

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.

09-23-2013, 08:54 AM	#1 (permalink)
Troyz Base Member Join Date: Mar 2013 Location: Austin Posts: 154 Drives: 370Z Touring M6 Rep Power: 13	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?

09-23-2013, 08:59 AM	#2 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	650hp forza370z and Troyz like this.

09-23-2013, 09:00 AM	#3 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	333, 315 __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language: Last edited by DEpointfive0; 09-23-2013 at 09:06 AM.

09-23-2013, 09:09 AM	#5 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	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. SouthArk370Z likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

09-23-2013, 09:21 AM	#8 (permalink)
enkei2k A True Z Fanatic Join Date: Apr 2011 Location: NYC Posts: 6,365 Drives: '12 G41 B/S M6 Rep Power: 3717	... WTF, Z drives amazing on gloomy day __________________ ...need boost... Last edited by enkei2k; 09-23-2013 at 09:57 AM.

09-23-2013, 09:25 AM	#9 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	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. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

09-23-2013, 09:29 AM	#10 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	DE- ok deleted reply so you can edit your power rating...

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Oil temperature	lachap55	Engine & Drivetrain	31	09-10-2012 06:09 AM
Oil Temperature Issues	EventHorizoN	Engine & Drivetrain	29	07-31-2011 09:05 PM
Outside air temperature gauge	Parrotguy	Exterior & Interior	6	03-09-2011 10:07 PM
Oil Temperature Video	Vectorsumio	Nissan 370Z Photos / Spyshots / Video / Media Gallery	39	08-27-2009 06:29 PM
Outside temperature gauge.	Chan Chee Hoe	Nissan 370Z General Discussions	12	05-11-2009 06:15 PM