highway RPM's with 3:73's

475HP '03 cobra · 11-25-2005, 08:23 PM

on a 2001 GT what kind of RPM am i looking at while cruising on the interstate at about 80MPH?

also how many MPG am i gonna lose?

Scothew · 11-26-2005, 12:40 AM

Assuming a 5-speed, you'll see about 2600 rpm which wont be bad at all. You might acctually pick up a MPG or two. It wont be bad at all. Good all around gear.

475HP '03 cobra · 11-26-2005, 01:34 AM

yeah, she's a manual...well if its that low what would i be looking at with 4:10?

Wall96cobra · 11-26-2005, 05:49 AM

I'd stick with 3.73's in a GT

EZ SPEED · 11-26-2005, 06:57 AM

We have 4.10's in our 2004 Mach 1 Auto

QWKSNKE · 11-26-2005, 06:58 AM

Quote:

Originally Posted by Wall96cobra

I'd stick with 3.73's in a GT

475HP '03 cobra · 11-26-2005, 08:56 AM

would you guys say 3:55 over 3:73? i really will never be on the highway becuase i have no reason to be, but every once and a while i have to make a trip to fun ford and other shows.

Scothew · 11-26-2005, 09:54 AM

3.55 wouldnt be a big difference over the stock 3.27's. I'd defintely go 3.73's for a street/mild track gt. Great all around gear. 4.10's are good and fun, but in a SOHC 4.6 it starts getting into its powerband sooner than a 4v and it may effect gas mileage slightly. If thats a concern at all, stick with 3.73's.

Btw, at 80 you will be about 2800-2900rpm in 5th.

475HP '03 cobra · 11-26-2005, 10:00 AM

cool...now will any of my mods effect this? i know a blower will but i dont have nor do i plan to get one ( just going to wait and buy an '07 shelby in about 5 years after they drop a little)

Scothew · 11-28-2005, 01:32 AM

You can do whatever you want and the gears will only compliment it.

Oh and when you change your speedo, you can use a chip or a speedcal. Personally I would go with a Chip (like teh SCT chips, I use Doug904 of bamachips.com) just because on top of speedo recalibration, you can get a custom tune including more power, better cooling effects, better driveability and a good chance of getting better mpg.

11-25-2005, 08:23 PM	#1
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	highway RPM's with 3:73's on a 2001 GT what kind of RPM am i looking at while cruising on the interstate at about 80MPH? also how many MPG am i gonna lose? __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.

11-26-2005, 12:40 AM	#2
Scothew Censored Jihad Join Date: Dec 2004 Location: B'ham, AL Posts: 4,108	Re: highway RPM's with 3:73's Assuming a 5-speed, you'll see about 2600 rpm which wont be bad at all. You might acctually pick up a MPG or two. It wont be bad at all. Good all around gear. __________________ Theres only one way to get to Carnegie Hall..... .... Practice.

11-26-2005, 01:34 AM	#3
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	Re: highway RPM's with 3:73's yeah, she's a manual...well if its that low what would i be looking at with 4:10? __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.

11-26-2005, 05:49 AM	#4
Wall96cobra ooooo cake!!! Join Date: Dec 2004 Location: Saks, AL Posts: 1,630	Re: highway RPM's with 3:73's I'd stick with 3.73's in a GT

11-26-2005, 06:57 AM	#5
EZ SPEED Friends Join Date: Dec 2004 Location: Tempe Arizona Posts: 3,029	Re: highway RPM's with 3:73's We have 4.10's in our 2004 Mach 1 Auto __________________ 2020 Range Rover Sport HSE P525 Dynamic - Firenze Red - Supercharged 5.0 - 518 HP SOLD - 2010 Camaro SS [/B] - Featured in GM High Tech Performance and Camaro Now Magazines - http://www.superchevy.com/features/g...of-perfection/

11-26-2005, 08:56 AM	#7
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	Re: highway RPM's with 3:73's would you guys say 3:55 over 3:73? i really will never be on the highway becuase i have no reason to be, but every once and a while i have to make a trip to fun ford and other shows. __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.

11-26-2005, 09:54 AM	#8
Scothew Censored Jihad Join Date: Dec 2004 Location: B'ham, AL Posts: 4,108	Re: highway RPM's with 3:73's 3.55 wouldnt be a big difference over the stock 3.27's. I'd defintely go 3.73's for a street/mild track gt. Great all around gear. 4.10's are good and fun, but in a SOHC 4.6 it starts getting into its powerband sooner than a 4v and it may effect gas mileage slightly. If thats a concern at all, stick with 3.73's. Btw, at 80 you will be about 2800-2900rpm in 5th. __________________ Theres only one way to get to Carnegie Hall..... .... Practice.

11-26-2005, 10:00 AM	#9
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	Re: highway RPM's with 3:73's cool...now will any of my mods effect this? i know a blower will but i dont have nor do i plan to get one ( just going to wait and buy an '07 shelby in about 5 years after they drop a little) __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.

11-28-2005, 01:32 AM	#10
Scothew Censored Jihad Join Date: Dec 2004 Location: B'ham, AL Posts: 4,108	Re: highway RPM's with 3:73's You can do whatever you want and the gears will only compliment it. Oh and when you change your speedo, you can use a chip or a speedcal. Personally I would go with a Chip (like teh SCT chips, I use Doug904 of bamachips.com) just because on top of speedo recalibration, you can get a custom tune including more power, better cooling effects, better driveability and a good chance of getting better mpg. __________________ Theres only one way to get to Carnegie Hall..... .... Practice.