...Switch from 3.73 to 3.31 ???

Matt M · Feb 18, 2017

Been hearing and seeing this debated, Curious what is the biggest benifit ?

Edit: Manual Car

Kuba · Feb 18, 2017

Is it auto or stick?
In general 3.73 vs 3.31 diff will make gearing shorter, that in my opinion would be better in N/A application however, if you are planning to go FI then longer gearing is probably what you want.
Some people like me for example would stick with 3.73 gears even though I'm going FI this season I'm keeping my gears because I absolutely love them.
As far as your choice, it all depends on what do you want to gain out of your car, street performance, track or drag performance. All these are subject to how are you going to use your vehicle.

Matt M · Feb 18, 2017

Kuba said:
Is it auto or stick?
In general 3.73 vs 3.31 diff will make gearing shorter, that in my opinion would be better in N/A application however, if you are planning to go FI then longer gearing is probably what you want.
Some people like me for example would stick with 3.73 gears even though I'm going FI this season I'm keeping my gears as they are because I absolutely love them.
As far as your choice, it all depends on what do you want to gain out of your car, street performance, track or drag performance. All these are subject to how are you going to use your vehicle.

Sorry, Manual car

My goal is not for drag strip but for late night bridge runs

jhatley7 · Feb 19, 2017

Matt M said:
Sorry, Manual car

My goal is not for drag strip but for late night bridge runs

Fi and 3.73 top out in 5th around 160. Do you plan to go faster?

Evo_Rob · Feb 19, 2017

It's going to come down to personal preference. I'm sticking to the 3.31's since I have zero issues with getting around town or with high speed runs. Still tops out in 5th. I honestly didn't really notice a difference with my 3.31's versus the 3.73's on an identically modded GT. Without the Whipple, yeah, there was a noticeable difference.

jhatley7 · Feb 19, 2017

Evo_Rob said:
Still tops out in 5th.

Well yea, lol but top of your 5th should be a lot faster than his.

Evo_Rob · Feb 19, 2017

jhatley7 said:
Well yea, lol but top of your 5th should be a lot faster than his.

Assuming I didn't still have a speed limiter, yes. Unfortunately, mine cuts out at about 155.

Doctor Fishtail · Feb 19, 2017

Matt M said:
Been hearing and seeing this debated, Curious what is the biggest benifit ?

Edit: Manual Car

I love this mod. Helps manage traction. With my 3:73s traction was unmanageable. Difficult to get going without lighting up rear tires. Went to 3:31s and traction is still an issue but easier to manage. With the 6 speed manual and able to stay in gears longer is a driving comfort also.

doodguy · Feb 19, 2017

I have 3.55, but 6060 transmission.

If interested in trading lmk I might be interested in swap.

Rlhay2 · Feb 19, 2017

Gears are a torque multiplier. How much torque and when/where is it produced are all factors.

ProChargerTECH · Feb 20, 2017

I have no dog in this fight....

But I love me some 3.55's when combined with boost.

Thats just me. (3.73's work, if you can spin the motor to the mooooooon)

Matt M · Feb 20, 2017

Rlhay2 said:
Gears are a torque multiplier. How much torque and when/where is it produced are all factors.

What my question is,

If the engines power band is in the middle of the RPM
then blowing by it with the 3.73 would be a bad thing?

the car is making over 700hp and i dont feel it needs gear to get it to go
but i could be wrong?

Matt M · Feb 20, 2017

jhatley7 said:
Fi and 3.73 top out in 5th around 160. Do you plan to go faster?

No,
0 to 150 is enough for me...

venumous · Feb 20, 2017

The question would be to those that have dropped from 3.73s to other after going boosted, how much did you pick up in the 1/4 being able to stay in 4th?

cmylxgo · Feb 20, 2017

I'm considering going up from 3.55s to 3.73s in my car. I have an auto and a Whipple and need more gear to get higher into the RPM range when I cross the stripe. Might even go 4.10s and run a 29" tire for better hook and book.

...Switch from 3.73 to 3.31 ???

Matt M

Well-Known Member

Kuba

Well-Known Member

Matt M

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jhatley7

Well-Known Member

Evo_Rob

Mmm... Boost...

jhatley7

Well-Known Member

Evo_Rob

Mmm... Boost...

Doctor Fishtail

Well-Known Member

doodguy

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Rlhay2

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ProChargerTECH

Well-Known Member

Matt M

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Matt M

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venumous

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cmylxgo

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