High RPM on low speeds

370zboss · 01-08-2014, 10:33 AM

It was about -29 degrees Celsius last night when I was cruising at about 120kph on 6th gear, I noticed that the rpm was literally at 2800-2900RPM. I asked a mechanic and he said it's probably due to the cold weather. The car was already warmed up though. I slowed down to 100kph and the rpm was still relatively high for 6th gear at 2500rpm. Any ideas what is wrong? It's a 2009 with sport package running on blizzack tires 245 18 front and 275 19 rear. Thanks.

cooltoy · 01-08-2014, 10:50 AM

Doesn't sound high.

You title should be "Low RPM at high speeds". I would not consider 120 clicks as low speed.

ghost_ix · 01-08-2014, 11:06 AM

Yup sounds normal to me. I'm around 2700 rpm at 70mph (112km)

Justice97 · 01-08-2014, 11:10 AM

Sounds normal to me.

And maybe its just me or I am completely ignorant about something, but WTF would temp have anything to do with transmission gearing and RPM of engine unless the actual clutch was slipping.

I would never talk to that mechanic again lol.

Chuck33079 · 01-08-2014, 11:13 AM

Quote:

Originally Posted by Justice97

Sounds normal to me.

And maybe its just me or I am completely ignorant about something, but WTF would temp have anything to do with transmission gearing and RPM of engine unless the actual clutch was slipping.I would never talk to that mechanic again lol.

Thank you. That was making my head hurt.

Cell · 01-08-2014, 11:42 AM

Quote:

Originally Posted by Justice97

Sounds normal to me.

And maybe its just me or I am completely ignorant about something, but WTF would temp have anything to do with transmission gearing and RPM of engine unless the actual clutch was slipping.

I would never talk to that mechanic again lol.

After going through some -40-50 degree wind chills here in chicago, I can tell you my SUV sounds like shiet driving in that cold compared to warmer weather.

Chuck33079 · 01-08-2014, 11:43 AM

Sounds? Sure. A different cruising rpm at the same speed? Unlikely.

Running4Mayor · 01-08-2014, 12:46 PM

Quote:

Originally Posted by 370zboss

It was about -29 degrees Celsius last night when I was cruising at about 120kph on 6th gear, I noticed that the rpm was literally at 2800-2900RPM. I asked a mechanic and he said it's probably due to the cold weather. The car was already warmed up though. I slowed down to 100kph and the rpm was still relatively high for 6th gear at 2500rpm. Any ideas what is wrong? It's a 2009 with sport package running on blizzack tires 245 18 front and 275 19 rear. Thanks.

You're going pretty fast man. Must be your first time paying attention to your RPMs

luigi90210 · 01-08-2014, 01:04 PM

completely normal, nothing to worry about

street2soul · 01-08-2014, 02:01 PM

it wouldn't make sense to have a slightly higher RPM than "usual" when you're already in gear and moving. Unless you're slipping clutch constantly. btw the rpm sounds normal for your car. pretty short gears and relatively high RPM at 60-70mph compared to other cars like camaro and mustang

TerribleONE · 01-08-2014, 02:59 PM

01-08-2014, 10:33 AM	#1 (permalink)
370zboss Base Member Join Date: Nov 2010 Location: Canada Posts: 42 Drives: 08 350z black M6 Rep Power: 14	High RPM on low speeds It was about -29 degrees Celsius last night when I was cruising at about 120kph on 6th gear, I noticed that the rpm was literally at 2800-2900RPM. I asked a mechanic and he said it's probably due to the cold weather. The car was already warmed up though. I slowed down to 100kph and the rpm was still relatively high for 6th gear at 2500rpm. Any ideas what is wrong? It's a 2009 with sport package running on blizzack tires 245 18 front and 275 19 rear. Thanks.

01-08-2014, 10:50 AM	#2 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,938 Drives: 14 PW 370Z S/T MT Rep Power: 240204	Doesn't sound high. You title should be "Low RPM at high speeds". I would not consider 120 clicks as low speed. DEpointfive0 likes this.

01-08-2014, 11:06 AM	#3 (permalink)
ghost_ix Base Member Join Date: Dec 2013 Location: Bay Area, CA Posts: 39 Drives: '14 370Z PW M6 Rep Power: 11	Yup sounds normal to me. I'm around 2700 rpm at 70mph (112km) UNKNOWN_370 likes this.

01-08-2014, 11:10 AM	#4 (permalink)
Justice97 Enthusiast Member Join Date: Sep 2013 Location: San Antonio Posts: 387 Drives: 11 370Z MB M6 Rep Power: 15	Sounds normal to me. And maybe its just me or I am completely ignorant about something, but WTF would temp have anything to do with transmission gearing and RPM of engine unless the actual clutch was slipping. I would never talk to that mechanic again lol. waaaasabi, SouthArk370Z, Chuck33079 and 3 others like this.

01-08-2014, 11:43 AM	#7 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Sounds? Sure. A different cruising rpm at the same speed? Unlikely. DEpointfive0 likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

01-08-2014, 01:04 PM	#9 (permalink)
luigi90210 A True Z Fanatic Join Date: Apr 2012 Location: San Diego CA Posts: 1,103 Drives: Classified Rep Power: 15	completely normal, nothing to worry about __________________ SOLD 370z New Car:classified DD:2011 Mini Cooper S stock

01-08-2014, 02:01 PM	#10 (permalink)
street2soul Enthusiast Member Join Date: Aug 2010 Location: Texas Posts: 284 Drives: 13 Nismo Rep Power: 3369	it wouldn't make sense to have a slightly higher RPM than "usual" when you're already in gear and moving. Unless you're slipping clutch constantly. btw the rpm sounds normal for your car. pretty short gears and relatively high RPM at 60-70mph compared to other cars like camaro and mustang

01-08-2014, 02:59 PM	#11 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	__________________ 638WHP 541WTQ @ 13.5PSI Build thread

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