Gears and mpg
Thread Starter
1st Gear Member
Joined: Jul 2005
Posts: 56
From:
Gears and mpg
hey guys,
i hope this was not already asked, but the search ability s*cks.
If i just change gears on a stock gt, what should i expect for mpg.
http://tchracing.com/tech/gearcalc.php
3.27@ 75mph =1.99rpm
3.71 @ 75mph =2.26rpm
4.10 @ 75mph =2.50rpm
Does anyone know approx. the diff in mpg between the gears? Is it signifigant? My mechanic recommended me to not go with 4.10s since i'm doing a lot of highway and i'm not a dragster.
thanks
i hope this was not already asked, but the search ability s*cks.
If i just change gears on a stock gt, what should i expect for mpg.
http://tchracing.com/tech/gearcalc.php
3.27@ 75mph =1.99rpm
3.71 @ 75mph =2.26rpm
4.10 @ 75mph =2.50rpm
Does anyone know approx. the diff in mpg between the gears? Is it signifigant? My mechanic recommended me to not go with 4.10s since i'm doing a lot of highway and i'm not a dragster.
thanks
5th Gear Member
Joined: Jun 2006
Posts: 4,355
From: Eureka, Mo
RE: Gears and mpg
ORIGINAL: 2002GTAUTOVERT
i also heard if ur a manual wanting to go F/I should stick with 3.73 to keep some top end speed... any truth to this?
i also heard if ur a manual wanting to go F/I should stick with 3.73 to keep some top end speed... any truth to this?
I haven't had my 4.10's long enough to check mileage, but the rpms aren't toooo bad, and the pull is great.
TECH SAVANT
Joined: Dec 2006
Posts: 10,937
From: Saint Augustine, FL
RE: Gears and mpg
If you drive a lot think about this long and hard--despite the common wisdom 3.73s will cost 2-3 MPG at highway speeds, 4.10's 2.5-4 MPG.. Premium is going to be $3.50 to $4.00 a gallon by this time next year (maybe sooner/maybe more)--if all goes well. [/align][/align]If the ********* get us into anything more than a 90 second war with Iran then we'll all be sitting in line waiting to pay $10/gallon...[/align]
2nd Gear Member
Joined: Dec 2006
Posts: 323
From: SinCinnati
RE: Gears and mpg
ORIGINAL: cliffyk
If you drive a lot think about this long and hard--despite the common wisdom 3.73s will cost 2-3 MPG at highway speeds, 4.10's 2.5-4 MPG.. Premium is going to be $3.50 to $4.00 a gallon by this time next year (maybe sooner/maybe more)--if all goes well. [/align][/align]If the ********* get us into anything more than a 90 second war with Iran then we'll all be sitting in line waiting to pay $10/gallon...[/align]
If you drive a lot think about this long and hard--despite the common wisdom 3.73s will cost 2-3 MPG at highway speeds, 4.10's 2.5-4 MPG.. Premium is going to be $3.50 to $4.00 a gallon by this time next year (maybe sooner/maybe more)--if all goes well. [/align][/align]If the ********* get us into anything more than a 90 second war with Iran then we'll all be sitting in line waiting to pay $10/gallon...[/align]