rpms - Pontiac G6 Forum
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 06-15-2009, 03:04 PM Thread Starter
Member
 
Join Date: May 2009
Posts: 55
 
rpms

i got a quick question regarding rpms.. driving at 80k/hr and im at 1500 rpms? is that normal? I do not know much about cars, but i drive a friends mercedes sometimes.. and at 80km/h im at 2500 rpm
thedudo18 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 06-15-2009, 03:38 PM
Lifetime Member
 
geewhiz's Avatar
 
Join Date: May 2008
Posts: 3,269
 
Overdrive, yes its normal.
Then drop it down to second gear and hit the gas, watch the RPMs then!




Mike
MODS;
None, if I want a faster car I'll buy one.
geewhiz is offline  
post #3 of 12 (permalink) Old 06-17-2009, 08:03 AM
Decepticon Extraordinaire
 
Lampoon's Avatar
 
Join Date: Sep 2005
Location: The Alamo
Posts: 5,348
    
How fast is 80k? lol

Sorry...dum Texan here. I can do about 55pmh at 1500rpm....

So sounds normal to me.

Then again my son's LS1 Z28 has a stock Hurst 6 speed manual so he can be running 80mph at 1500 easy. lol

MODS:
Crab Intakes CAB, MPD Ram Air hood, Custom exhaust,
WAMS High Performance Tune and a whole lot more....

My Progession
Lampoon is offline  
Sponsored Links
Advertisement
 
post #4 of 12 (permalink) Old 06-17-2009, 02:34 PM
GTP 06
 
maykevin5's Avatar
 
Join Date: Nov 2008
Age: 36
Posts: 588
 
Send a message via MSN to maykevin5
50mph.. sounds about right. Its less than mine at 50 but my gear ratio is different with a GTP.
maykevin5 is offline  
post #5 of 12 (permalink) Old 06-26-2009, 11:05 PM
Mobile Audio Specialist
 
mjgonegm's Avatar
 
Join Date: Jun 2009
Posts: 396
 
lower rpm's equal better gas millage to btw

Mobile Audio & H.I.D/Xenon & Lighting Specialist
mjgonegm is offline  
post #6 of 12 (permalink) Old 07-25-2009, 08:06 PM
Senior Member
 
Join Date: Jul 2009
Posts: 470
 
I run approx 1900rpm in my 3.29 axle GT with auto-stick trans. Not sure what the OD ratio is, but I know the standard V6 has a 3.09 (approx) axle ratio which lowers highway engine speed slightly. I know around 70km/h the engine barely turns over, around 1300rpm.

'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019

'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)
360ci is offline  
post #7 of 12 (permalink) Old 07-26-2009, 10:15 AM
Senior Member
 
Join Date: Nov 2005
Posts: 451
 
Base V6 with the 3.05 final ratio runs around 1600 rpm at 60 mph (96 km/h).

Lower engine speed saves gas but produce less horsepower. It's a trade-off.
mrslcom is offline  
post #8 of 12 (permalink) Old 07-27-2009, 01:26 PM
Senior Member
 
Join Date: Jul 2009
Posts: 470
 
Quote:
Originally Posted by mrslcom View Post
Base V6 with the 3.05 final ratio runs around 1600 rpm at 60 mph (96 km/h).

Lower engine speed saves gas but produce less horsepower. It's a trade-off.
Trade offs can be good, too! If I drove a lot of miles, I'd prefer the 3.05 axle ratio, not just for better mileage, but for lowered engine wear, and perhaps, longer component life as well. Still, the auto-stick is still my fav transmission when the weather is GREAT.

'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019

'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)
360ci is offline  
post #9 of 12 (permalink) Old 08-02-2009, 01:10 PM
Premium Member
 
KB G6's Avatar
 
Join Date: Nov 2008
Location: lat: 38.897605896 N, long: 77.0365219116 W
Age: 35
Posts: 566
 
Quote:
Originally Posted by 360ci View Post
Trade offs can be good, too! If I drove a lot of miles, I'd prefer the 3.05 axle ratio, not just for better mileage, but for lowered engine wear, and perhaps, longer component life as well. Still, the auto-stick is still my fav transmission when the weather is GREAT.
I can squeeze out about 33 MPG on the highway doing anywhere between 60-70. I don't know how much more I could get out of a regular V6, but I'm sure not complaining. The only time I use the auto stick is when I'm in PA and going down the mountains; upshift so I don't burn up the brakes.

Keith

2005 G6 GT

K&N drop-in filter, Pennzoil Platinum 5W-30, 50% tint all around, other than that completely stock

SOLD 11/20/2010
KB G6 is offline  
post #10 of 12 (permalink) Old 08-02-2009, 10:25 PM
Senior Member
 
Join Date: Nov 2005
Posts: 451
 
Quote:
Originally Posted by 360ci View Post
Trade offs can be good, too! If I drove a lot of miles, I'd prefer the 3.05 axle ratio, not just for better mileage, but for lowered engine wear, and perhaps, longer component life as well.
Yes, but up to a point. If the engine speed is too low, a few problems can occur:

the engine can lug when it doesn't produce enough power. lugging put lots of stress on the engine. engine wear and engine parts damage can occur.

the engine may not be running at its optimum temperature. it will run cooler with lower engine speeds. cooler engines can cause excessive carbon buildup in the combustion chamber, which eventually can cause engine damage and shorten engine life.

There are just so many factors and trade-offs involved it just depends on what is important to you. Driving habits and maintenance history have the biggest effect on engine life these days, rather than engine size or engine speed.
mrslcom is offline  
post #11 of 12 (permalink) Old 08-03-2009, 04:46 PM
Senior Member
 
Join Date: Jul 2009
Posts: 470
 
Quote:
Originally Posted by mrslcom View Post
Yes, but up to a point. If the engine speed is too low, a few problems can occur:

the engine can lug when it doesn't produce enough power. lugging put lots of stress on the engine. engine wear and engine parts damage can occur.

the engine may not be running at its optimum temperature. it will run cooler with lower engine speeds. cooler engines can cause excessive carbon buildup in the combustion chamber, which eventually can cause engine damage and shorten engine life.

There are just so many factors and trade-offs involved it just depends on what is important to you. Driving habits and maintenance history have the biggest effect on engine life these days, rather than engine size or engine speed.
I concur. There are other factors involved. As I don't do a lot of high speed, commuting on interstates the lower axle ratio is the one I go with. Just like my Dodge Durango R/T. It's a beast and tows great at 55mph as it has a low 3.92 axle ratio allowing the lower end of the powerband (2600rpm at 1:1 gear) to pull up anything with 5.5K attached to the hitch.

As for mileage, I really can't comment much on my G6 GT. It's mostly 50/50 city/highway mix lately, and the highways here are 50-60mph. I think GM would have been better off to offer the auto-stick as an option in the base V6 cars. If I had to rough estimate it, I'd put my 50/50 driving around 21-23mpg. My Taurus gets a bit less, as it's a heavier vehicle. My Dodge. well, it gets gpm, not mpg.

'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019

'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)
360ci is offline  
post #12 of 12 (permalink) Old 08-03-2009, 10:01 PM
Senior Member
 
Join Date: Nov 2005
Posts: 451
 
The number of engine choices and final ratios and transmissions available are ridiculous for the G6. Yes I think the 6-speed auto-stick should be standard across the board for all G6s. Better performance with better gas mileage. Having an ancient 4-speed auto in a sporty car is just stupid.
mrslcom is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac G6 Forum > Technical Discussion & Modifications > General Maintenance

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac G6 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2005 G6 GT squeals at high rpms dantheman65 Problems and Solutions 5 11-20-2009 11:17 PM
High pitch noise at high RPM's. Please Help! BostonTaylor Problems and Solutions 3 06-25-2009 08:33 AM
3.5L No power @1300-1500 RPM cdsipjp Problems and Solutions 2 07-03-2007 08:14 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome