Gas Mileage with 3.73s... 4.10s??

wormster00 · January 22nd, 2007, 07:27 AM

I was wondering if anyone has swapped their stock gears for the 3.73s or 4.10s. I wanted to know what the difference in gas mileage was from stock. Also wanted to know what rpms I'd be taching at interstate speed...

Thanks!

GTNorm · January 22nd, 2007, 07:52 AM

I haven't done it, but mathematically it looks like for the 4.10s multiply your current rpms by 1.155 or for the 3.73s multiply by 1.05 to get the changed rpms.

Drgnracin72 · January 22nd, 2007, 08:17 AM

http://www.moddedmustangs.com/forums...s-vt10472.html

07BossGT · January 22nd, 2007, 04:43 PM

I have had my mustang geared-up to 4.10 It's a 5-speed and I'm running about 2800-3000 @ 80mph. My gas mileage stayed about the same... CRAPPY. But I didn't buy it for mileage.

Yea.... it's fast!

miafan · January 22nd, 2007, 04:44 PM

that'll conclude this thread

sonicblue · January 22nd, 2007, 07:07 PM

who buys a mustang for gas mileage anyways lol

maverick · January 22nd, 2007, 07:08 PM

but you could install a pc fuel managment system like a ferrari has

MustangMatt · January 22nd, 2007, 07:18 PM

4.10's, CAI, SCT tune and Steeda Exhaust. I drive about 85 MPH most of the time on the highway and average about 21 MPG. Only about 16 in the city but I drive like an idiot.

1LOUDGT · January 22nd, 2007, 08:00 PM

Well if you bought a gt for the gas mileage your a comlpete fucking idiot.

1LOUDGT · January 22nd, 2007, 08:01 PM

this is nick btw lol

TheUNZippee! · January 22nd, 2007, 08:43 PM

Originally Posted by 1LOUDGT

Well if you bought a gt for the gas mileage your a comlpete fucking idiot.

Perhaps, but if you're an average Joe like me who can't afford two cars and has a commute, it might be important. All I can afford is to put mine up for the winter and spring for a shitty winter beater,other than that, in the summer, the Stang has to be fairly realistic mileage wise.I don't go around thinking it should be getting fantastic fuel economy, but since I commute quite a ways, I need at least 25 mpg out of a car to be able to use it every week.
If I hit the jackpot, I'll quit my job, ram a blown aluminum stroker in it, and say fuck the fuel mileage. lol Until then, it does hold some importance to some people.

Rick

TDog · January 22nd, 2007, 08:57 PM

Gears: Are great for the track, but street stuff. Not worth it. Remember, gears don’t give you more horsepower..nor more torque. They simply spread the same power drop thru a different spectrum of gears. 1, 2, 3 etc.. Your rpm's will change, but the power remains a constant.

FastBack71 · January 22nd, 2007, 09:09 PM

yes.. But seriously 3.73's are the best gear 4.10's are to damn torquey.. 1st gear is useless and no way are you hookin up at all with stock tires.. 3.73's are the way to go IMO

plus you can without a problem at all do highway driving, at a low rpm.. doin 65mph in 4th gear.. someone rolls next to you slam it down to third and punch it and your gone..

TDog · January 22nd, 2007, 09:18 PM

Yup. Its all about driving and taste. Im quite happy w/stock on my manual 07 . I'm looking more at the power output now...

TheUNZippee! · January 22nd, 2007, 09:25 PM

All depends what you're into I guess. For the average guy who uses his car on the street, 3:55's with some decent power are more than enough, maybe 3:73's if you start getting into serious power, and 4:10's if your car sees mainly track time.If you don't really drag your car, you'll be sorry when you take your car on a road trip, unless you can afford to spring for a nice 6-speed tranny to compensate for the steep gear.

Rick

1LOUDGT · January 23rd, 2007, 06:12 AM

Upping your gears is like carrying a gun. You never want to use it but you know you have it just in case. If you do use it you don’t want to realize afterward that you should have bought a 45 cal instead of the 38 special. 3.73 for stick, 4.10 for automatic. If you’re a conservative driver don’t get gears at all.

MPH RPM
30- 1250
35- 1450
40- 1600
45- 1800
50- 1900
55- 2100
60- 2300
65- 2500
70- 2700
75- 2800
80- 2900

wormster00 · January 23rd, 2007, 10:52 AM

Wow! You guys rock. I guess you could say I'm starting to care more about performance and less about mileage... My first car was a '74 Mercury Comet with a stock 302. Then I spent 12 years owning a Jeep Wrangler, but when I saw the new 2005s I lusted in my heart. So I've had my 2005 for almost a year now and my infatuation with its stock performance has begun to fade. I want MORE so I'm starting to figure out how to begin the process. Like most average Joes, I'm doing things one mod at the time due to the fact that last time I looked, money was NOT falling out of my butt.

My idea is to upgrade to 3.73s, then exhaust, then CAI and tuning...

Any thoughts... I am still fairly new to the modification game.

Jeff

GTsetGO · January 23rd, 2007, 11:02 AM

Originally Posted by sonicblue

who buys a mustang for gas mileage anyways lol

+1

But I get anywhere from 23-26 on a highway trip and then about 18 around town.

flattusmaximus78 · January 23rd, 2007, 01:45 PM

I think your cars lieing to you. My dads average speed is like 24.2 mph and he gets 14. something miles to the gallon.

TheUNZippee! · January 23rd, 2007, 01:56 PM

14 would be about right at that average speed. Take it out on the highway, set the cruise at 70, newer stangs will easily get 26.

January 22nd, 2007, 07:27 AM	#1
wormster00 Regular Join Date: Jan 2007 Location: Eastern NC Posts: 89 iTrader: 0 reviews	Gas Mileage with 3.73s... 4.10s?? I was wondering if anyone has swapped their stock gears for the 3.73s or 4.10s. I wanted to know what the difference in gas mileage was from stock. Also wanted to know what rpms I'd be taching at interstate speed... Thanks!

January 22nd, 2007, 07:52 AM	#2
GTNorm Enthusiast Join Date: Jun 2006 Posts: 511 iTrader: 0 reviews	I haven't done it, but mathematically it looks like for the 4.10s multiply your current rpms by 1.155 or for the 3.73s multiply by 1.05 to get the changed rpms. __________________ A man with experience is never at the mercy of a man with a theory.

January 22nd, 2007, 08:17 AM	#3
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	http://www.moddedmustangs.com/forums...s-vt10472.html __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

January 22nd, 2007, 04:43 PM	#4
07BossGT Regular Join Date: Jan 2007 Posts: 207 iTrader: 0 reviews	I have had my mustang geared-up to 4.10 It's a 5-speed and I'm running about 2800-3000 @ 80mph. My gas mileage stayed about the same... CRAPPY. But I didn't buy it for mileage. Yea.... it's fast! __________________ '07 Grabber Orange GT 5-spd Just got it 12/26/06 Tinted Windows 4.10 Gears A WHOLE LOTTA FUN!!!

January 22nd, 2007, 07:07 PM	#6
sonicblue Hardcore Enthusiast 1990 GT Join Date: Aug 2006 Location: dalzell, south carolina Posts: 1,436 iTrader: 0 reviews	who buys a mustang for gas mileage anyways lol __________________ 1990 5.0 getting all fixed up for next season 2004 mustang gt 520rwhp, 491 trq sold

January 22nd, 2007, 04:44 PM	#5
miafan Regular Join Date: Dec 2006 Posts: 206 iTrader: 0 reviews	that'll conclude this thread

January 22nd, 2007, 07:08 PM	#7
maverick Regular Join Date: Oct 2006 Location: Arizona Posts: 200 iTrader: 0 reviews	but you could install a pc fuel managment system like a ferrari has __________________ LOOKIN' FOR MY "MUSTANG SALLY!" . . . . . . ARE YOU OUT THERE?

January 22nd, 2007, 07:18 PM	#8
MustangMatt Regular 2009 427R Roush 12.39 Join Date: Nov 2006 Location: Ormond Beach, Florida Posts: 113 iTrader: 0 reviews	4.10's, CAI, SCT tune and Steeda Exhaust. I drive about 85 MPH most of the time on the highway and average about 21 MPG. Only about 16 in the city but I drive like an idiot. __________________ 2009 427R Vert 3.73's, Roush Big Brake Kit

January 22nd, 2007, 08:00 PM	#9
1LOUDGT Enthusiast 2006 GT 11.99@114 Join Date: Sep 2006 Location: Orlando, FL. Posts: 800 iTrader: 0 reviews	Well if you bought a gt for the gas mileage your a comlpete fucking idiot. __________________ 2006 GT (Fastest) 2004 COBRA (Faster) 1990 LX 5.0 (Fast)

January 22nd, 2007, 08:01 PM	#10
1LOUDGT Enthusiast 2006 GT 11.99@114 Join Date: Sep 2006 Location: Orlando, FL. Posts: 800 iTrader: 0 reviews	this is nick btw lol __________________ 2006 GT (Fastest) 2004 COBRA (Faster) 1990 LX 5.0 (Fast)

January 22nd, 2007, 08:57 PM	#12
TDog Enthusiast Join Date: Jan 2007 Posts: 650 iTrader: 0 reviews	Gears: Are great for the track, but street stuff. Not worth it. Remember, gears don’t give you more horsepower..nor more torque. They simply spread the same power drop thru a different spectrum of gears. 1, 2, 3 etc.. Your rpm's will change, but the power remains a constant. __________________ Tdog 2007 mustang GT 5speed, Black

January 22nd, 2007, 09:09 PM	#13
FastBack71 Enthusiast Join Date: Dec 2006 Posts: 587 iTrader: 0 reviews	yes.. But seriously 3.73's are the best gear 4.10's are to damn torquey.. 1st gear is useless and no way are you hookin up at all with stock tires.. 3.73's are the way to go IMO plus you can without a problem at all do highway driving, at a low rpm.. doin 65mph in 4th gear.. someone rolls next to you slam it down to third and punch it and your gone.. __________________ My friends used to wonder Why i joined the air force. Now they wonder why they didn't.

January 22nd, 2007, 09:18 PM	#14
TDog Enthusiast Join Date: Jan 2007 Posts: 650 iTrader: 0 reviews	Yup. Its all about driving and taste. Im quite happy w/stock on my manual 07 . I'm looking more at the power output now... __________________ Tdog 2007 mustang GT 5speed, Black

January 23rd, 2007, 06:12 AM	#16
1LOUDGT Enthusiast 2006 GT 11.99@114 Join Date: Sep 2006 Location: Orlando, FL. Posts: 800 iTrader: 0 reviews	Upping your gears is like carrying a gun. You never want to use it but you know you have it just in case. If you do use it you don’t want to realize afterward that you should have bought a 45 cal instead of the 38 special. 3.73 for stick, 4.10 for automatic. If you’re a conservative driver don’t get gears at all. MPH RPM 30- 1250 35- 1450 40- 1600 45- 1800 50- 1900 55- 2100 60- 2300 65- 2500 70- 2700 75- 2800 80- 2900 __________________ 2006 GT (Fastest) 2004 COBRA (Faster) 1990 LX 5.0 (Fast)

January 23rd, 2007, 10:52 AM	#17
wormster00 Regular Join Date: Jan 2007 Location: Eastern NC Posts: 89 iTrader: 0 reviews	Wow! You guys rock. I guess you could say I'm starting to care more about performance and less about mileage... My first car was a '74 Mercury Comet with a stock 302. Then I spent 12 years owning a Jeep Wrangler, but when I saw the new 2005s I lusted in my heart. So I've had my 2005 for almost a year now and my infatuation with its stock performance has begun to fade. I want MORE so I'm starting to figure out how to begin the process. Like most average Joes, I'm doing things one mod at the time due to the fact that last time I looked, money was NOT falling out of my butt. My idea is to upgrade to 3.73s, then exhaust, then CAI and tuning... Any thoughts... I am still fairly new to the modification game. Jeff

January 23rd, 2007, 01:45 PM	#19
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,121 iTrader: 3 reviews	I think your cars lieing to you. My dads average speed is like 24.2 mph and he gets 14. something miles to the gallon. __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

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