Difference in Gas Mileage Between 3.73 and 4.10's

Smoothgrandmama · January 6th, 2008, 08:04 AM

Originally Posted by SilverGT04

so how long does it take to break gears in and how much more does 4.10's pull than 3.73

Not Long I didn't break mine in at all!

GRAB_THS · January 8th, 2008, 09:00 AM

Originally Posted by Juggalo_X

yep even at higher rpms. installing a steeper gear set puts more torque down. it doesn't add any just gets it to the ground better. there for your engine works less to keep a higher rpm.

What I was getting at....

rays03gt · January 13th, 2008, 08:53 PM

I had 3.73's in mine not bad better than stock. now I'm going right to the 4.30's who gives a shit about gas mileage it's a mustang there made for hauling ass. when u run out of fuel ya just put more in. If u have to ask about milage in a stang then your not worthy of driving one. please sell it to a real stanger and get a volkswagon bug disel. my queer boss say's he get's 50 miles to the gallon. yipie looser

stroker408 · January 17th, 2008, 08:24 PM

i went from 3,55s to 3,73s and lost 2 mpg. i cant get 20 anymore. i got 22 at best with 3.55. i cant get over 19.4 now with 3.73s and staying out of the boost

my car would still pull good with some 3.27s. and might get 24 mpg

TyCouey2000GT · January 22nd, 2008, 10:09 PM

I barely make 200 miles per tank in my 00 gt

bogdans01gt · February 2nd, 2008, 06:17 PM

definetly a great post, i had 3.73's 2 weeks ago and now i switched to 4.10's definetly no difference in gas......

mystang0673 · February 6th, 2008, 03:09 AM

just get 4.10s

takiller · February 9th, 2008, 12:24 AM

with stick gears i can barely get 290 miles to the TANK. wheni had 4.10's i could get in the 312-320 mile to the tank depending on driving

. the whole thing about your going to get horrible gas mileage is like a myth man. you have more power at lower rpms, right? SOOOO that means you can shift a lot earlier and still have PLENTY power to get through the gears. and if you shift at low rpms's then you save on gas. BOOM!! theyre you go, 1st hand experience.

sk8flip67 · February 10th, 2008, 10:24 PM

Anyone running 4:10's on an auto?

TripleBlackCobra · February 15th, 2008, 05:51 PM

I was getting ready to post a thread on this topic when I noticed this one. I wanted 4.10's but my tuner said that I may be better off with 3.73's since I mainly drive it on the street and it isn't only a track car. I am pulling 16lbs boost and although I have the new MT ET Drags, traction is still an issue. It just doesn't seem like there would be a big difference from stock 3.55 to 3.73? But then how much difference between 3.73 and 4.10?

Volstang · February 17th, 2008, 01:23 AM

Originally Posted by mdvaldosta

Top speed isn't gonna go down, as the stock gearing is gonna put you way higher than what the car's capable of anyways. In fact, top speed will probably go up switching to 4.10's as you'll be higher in the powerband where you'd need it to keep accelerating. At any rate, at 70mph in 5th gear you'd probably be around 2600 rpm's. In my 2002GT I'm at 2400rpm at 70 but my overdrive is a tad smaller than yours.

Uh top speed is topped out speed so there is no acceleration so goes the saying TOP SPEED. and it does loose it with lower gear whether its a car, bike, boat, whatever.

medic_chris85 · February 17th, 2008, 07:17 AM

Originally Posted by sk8flip67

Anyone running 4:10's on an auto?

I am

competition orange · February 17th, 2008, 11:39 PM

keep the 4.10's

RanGer498 · February 24th, 2008, 01:35 AM

Originally Posted by cliffyk

Tires sizes are specified as the tread width/aspect ratio-wheel diameter--the aspect ratio is the ratio of the sidewall height to the tread width, specified as a percentage...

So, a 245/45-17 has a tread that's 245 mm wide, an aspect ratio of 45, and is meant for a 17" wheel.

245 * .45 = 110.25 mm, so we know the sidewall is 110.25 mm high, add the sidewal height * 2 to the wheel diameter and we find that this tire is 110.25 * 2 + 17 * 25.4 or 652.3 mm, or 25.68" which is pretty close to the 25.7" most manufacturers state.

Now lets do a 275/40-17, 275 * .4 = 110 mm, 110 * 2 + 17 * 25.4 = 651.8 mm = 25.66" (again pretty close to 25.7").

OK, now let's do the math for a 225/45-17; 225 * .45 = 101.25 mm, so a 225/45-17 tire is going to have an outside diameter of (101.25 * 2 + 17 * 25.4) = 634.3 mm = 24.97" (25" is the quoted spec).

That's how you change tire diameters--buy tires of a different diameter...

what about 315/35/17s?

Originally Posted by sk8flip67

Anyone running 4:10's on an auto?

same questions

cnile · February 29th, 2008, 08:38 PM

This Is A No Brainer Question. Lower Gear Will Drop The Gas Milleage Some, But If You Would Like To Win Races Then Who Cares.
The Best Rule Of Thumb I Have Heard Is 3.73 For Stick, And 4.10's For Auto. I Run A 4.10 With A Manual Valve Body Tranny. Love It. Drive It On The Street, And Run L0w 10's At Track.

Heck We Pay $7.00 For Race Gas, So Money Better Not Matter That Much. ( I Am Not Rich Either.)

reaper30 · March 5th, 2008, 07:15 PM

373s for the win

reaper30 · March 5th, 2008, 07:15 PM

best all around gear by far

njstang · March 5th, 2008, 08:44 PM

so what about 1/4 mile differences? is there a big difference in et's between the two gears??

RALVAREZ26 · March 7th, 2008, 06:41 PM

everyone's talking about 3:73 and 4:10 but what about 4:56's? anybody in this board has some?

interfac9 · April 7th, 2008, 12:01 AM

I put 4.10s on mine, and it was the best thing I ever did!!! Boy did she wake up... I highly recommend them.

January 13th, 2008, 08:53 PM	#143
rays03gt Newbie Join Date: Aug 2007 Posts: 4	I had 3.73's in mine not bad better than stock. now I'm going right to the 4.30's who gives a shit about gas mileage it's a mustang there made for hauling ass. when u run out of fuel ya just put more in. If u have to ask about milage in a stang then your not worthy of driving one. please sell it to a real stanger and get a volkswagon bug disel. my queer boss say's he get's 50 miles to the gallon. yipie looser Last edited by rays03gt : January 13th, 2008 at 08:56 PM.

January 17th, 2008, 08:24 PM	#144
stroker408 Regular Join Date: Feb 2006 Posts: 201	i went from 3,55s to 3,73s and lost 2 mpg. i cant get 20 anymore. i got 22 at best with 3.55. i cant get over 19.4 now with 3.73s and staying out of the boost my car would still pull good with some 3.27s. and might get 24 mpg Last edited by stroker408 : January 17th, 2008 at 08:37 PM.

January 22nd, 2008, 10:09 PM	#145
TyCouey2000GT Enthusiast 2000 Mustang GT Join Date: Jun 2007 Posts: 620	I barely make 200 miles per tank in my 00 gt __________________ 00' GT Few boltons and full uxhaust including shortys

February 9th, 2008, 12:24 AM	#148
takiller Regular 2003 Mustang GT no clue Join Date: Aug 2007 Location: Texas Posts: 258	with stick gears i can barely get 290 miles to the TANK. wheni had 4.10's i could get in the 312-320 mile to the tank depending on driving . the whole thing about your going to get horrible gas mileage is like a myth man. you have more power at lower rpms, right? SOOOO that means you can shift a lot earlier and still have PLENTY power to get through the gears. and if you shift at low rpms's then you save on gas. BOOM!! theyre you go, 1st hand experience. __________________ What was that you were saying about power to weight ratio? Thats what I thought.

February 15th, 2008, 05:51 PM	#150
TripleBlackCobra Newbie 2004 SVT Mustang Cobra Join Date: Aug 2007 Location: St. Louis MO Posts: 11	add to question about gear swap... I was getting ready to post a thread on this topic when I noticed this one. I wanted 4.10's but my tuner said that I may be better off with 3.73's since I mainly drive it on the street and it isn't only a track car. I am pulling 16lbs boost and although I have the new MT ET Drags, traction is still an issue. It just doesn't seem like there would be a big difference from stock 3.55 to 3.73? But then how much difference between 3.73 and 4.10? __________________ 2004 Terminator Cobra #45 Triple Black 16 lbs boost with various mods

February 2nd, 2008, 06:17 PM	#146
bogdans01gt Newbie 2001 Mustang GT Join Date: Feb 2008 Location: NILES Posts: 21	definetly a great post, i had 3.73's 2 weeks ago and now i switched to 4.10's definetly no difference in gas......

February 6th, 2008, 03:09 AM	#147
mystang0673 Hardcore Enthusiast 13.0@104 Join Date: Jan 2007 Posts: 1,372	just get 4.10s

February 10th, 2008, 10:24 PM	#149
sk8flip67 Regular 2004 Mustang GT Join Date: Sep 2007 Location: Frederick, MD Posts: 135	Anyone running 4:10's on an auto?

February 17th, 2008, 11:39 PM	#153
competition orange Newbie 2004 mustang gt Join Date: Feb 2008 Location: uniontown,pennslyvania Posts: 25	keep the 4.10's

February 29th, 2008, 08:38 PM	#155
cnile Newbie 2004 Mustang GT 10.67 @ 125.45 Join Date: Nov 2007 Location: Houston, Texas Posts: 4	This Is A No Brainer Question. Lower Gear Will Drop The Gas Milleage Some, But If You Would Like To Win Races Then Who Cares. The Best Rule Of Thumb I Have Heard Is 3.73 For Stick, And 4.10's For Auto. I Run A 4.10 With A Manual Valve Body Tranny. Love It. Drive It On The Street, And Run L0w 10's At Track. Heck We Pay $7.00 For Race Gas, So Money Better Not Matter That Much. ( I Am Not Rich Either.) __________________ Car with new motor is great. Now runs mid 10's on Motor, and ran a 10.012 on a 50 shot of NOS. Got thrown off 1/4 track, so will just run the 1/8 NO CAGE. JUST A ROLL BAR. LIKE TO STREET DRIVE IT,SO WILL NOT INSTALL CAGE.

March 5th, 2008, 07:15 PM	#156
reaper30 Newbie Join Date: Jan 2008 Posts: 26	373s for the win

March 5th, 2008, 07:15 PM	#157
reaper30 Newbie Join Date: Jan 2008 Posts: 26	best all around gear by far

March 5th, 2008, 08:44 PM	#158
njstang Regular 2004 Mustang GT 14.20@98.61 Join Date: Feb 2008 Location: New Jersey Posts: 234	so what about 1/4 mile differences? is there a big difference in et's between the two gears??

March 7th, 2008, 06:41 PM	#159
RALVAREZ26 Regular 2000 MUSTANG GT 14.2@96.53 Join Date: Jul 2007 Location: DALLAS Posts: 360	everyone's talking about 3:73 and 4:10 but what about 4:56's? anybody in this board has some? __________________ http://smokinperformance.com '00 GT cai,x-pipes w/flowmaster dumped, sct tune!

April 7th, 2008, 12:01 AM	#160
interfac9 Newbie 1999 Mustang GT Join Date: Dec 2007 Location: Newport News, VA Posts: 22	I put 4.10s on mine, and it was the best thing I ever did!!! Boy did she wake up... I highly recommend them. __________________ Building a better mousetrap only makes smarter mice....

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Difference in Gas Mileage Between 3.73 and 4.10's

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