Which gear to buy

stevesLX

Member

Nov 12, 2006

373

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16

cincinnati

Jul 5, 2007

#1

• Jul 5, 2007

• #1

I have a 4.10 that is pretty much toast and have been considering going with a 3.73. How much is this going to affect my 1/4 mile times. Right now on motor I am at a 13.5 @ 103MPH. I have sprayed the car with a 75 shot and can't spray it until 3rd gear because I cant hook up but I run out of gear in fourth when spraying with about 60 ft of track left. My best on the nitrous is a 13.20 @ 106. I will be running this on motor more than spray. I just want the best gear for both and not really lose any time on running just motor.

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

0

10

49

Thomasville, ga

Jul 5, 2007

#2

• Jul 5, 2007

• #2

i think the 3.73 is a better gear unless you are running a really tall tire. you will more than make up in mid range and top end with spray at the track with the 3.73 and you wont run out of gear as quick thus eliminating a shift. in my opinion the 3.73 is much better.

 

stevesLX

Member

Nov 12, 2006

373

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cincinnati

Jul 5, 2007

#3

• Jul 5, 2007

• #3

I am running 245/45/17 drag radials. If I go with a 3.73 am I going to lose anytime running on just motor. Right now I am running thru the traps at around 5700 RPM's in 4th gear on just the motor and my best time is a 13.55 @ 103. Thats with the 4.10

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

0

10

49

Thomasville, ga

Jul 5, 2007

#4

• Jul 5, 2007

• #4

stevesLX said:

I am running 245/45/17 drag radials. If I go with a 3.73 am I going to lose anytime running on just motor. Right now I am running thru the traps at around 5700 RPM's in 4th gear on just the motor and my best time is a 13.55 @ 103. Thats with the 4.10

Click to expand...

no. it balances out pretty good. it just depends on where you want your speed to come in at. if you want to get it all from a digg and lose it in top end then stick with the 4.10 ut if you want it in more mid range get the 3.73's. and more than likely the 3.73 will be less likely to spin off the line than 4.10 would so you night actually run faster. but i could be wrong about the spinning. its all in how you leave the hole.

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

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New York

Jul 5, 2007

#5

• Jul 5, 2007

• #5

Yeah most likely you WILL lose time on motor. You didn't list the combo though so w/o any info no one can really help you.

 

stevesLX

Member

Nov 12, 2006

373

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16

cincinnati

Jul 5, 2007

#6

• Jul 5, 2007

• #6

My combo is as follows: 89 LX 302 Edelbrock 5.0 performer intake,75MM TB,C&L MAF, 24# injectors,MAC air intake, F cam,BBK full length headers 2 1/2 flowmaster exhaust, 4.10's, Lakewood 70/30 front struts Zex 75 shot . 245/45/17 Nitto DR's



Now I know its going to help me a ton with the nitrous. I just need to know if its going to slow me down on motor.

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Jul 5, 2007

#7

• Jul 5, 2007

• #7

With that combo it absolutly WILL hurt you on motor.

 

stevesLX

Member

Nov 12, 2006

373

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16

cincinnati

Jul 5, 2007

#8

• Jul 5, 2007

• #8

How much are we talking as far as hurting me on motor. Because right now with the 4.10 I am spinning almost all of first gear and a little in 2nd gear just on motor. My best 60ft is a 1.95. Even if I slip the clutch as soon as I get my foot to the floor it starts spinning. On DR's and slicks

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

0

10

49

Thomasville, ga

Jul 5, 2007

#9

• Jul 5, 2007

• #9

spinning on slicks?? do a better burnout

 

maxine-70

20+ Year Stangneter

Mar 27, 2003

273

1

18

louisville, ky

Jul 5, 2007

#10

• Jul 5, 2007

• #10

try a 3.90 gear. motive gear is the only one making it.

 

stevesLX

Member

Nov 12, 2006

373

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16

cincinnati

Jul 5, 2007

#11

• Jul 5, 2007

• #11

Let me rephrase that I am not really spinning on slicks but I a'int getting into it like I should because my rear suspension is all stock. I dont want to break anything by diging hard. I just dont want to go out and buy a 3.73 if its going to kill me on the motor. I can live with a tenth or so but if its going to slow me down to like a 1/2 -1 second slower thats another story.

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

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Jul 5, 2007

#12

• Jul 5, 2007

• #12

It will probably be .1-.2 or so and 1-2mph. You'll be crossing the traps too low with the 3.73's on motor. If its a dedicated gas car gear it for that, if not stay 4.10.