2.73 to 3.73 gear swap

1995GTStang

New Member

Feb 9, 2009

74

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Washington State

Dec 30, 2010

#1

• Dec 30, 2010

• #1

I am having my gears swapped in my 97' GT 5 speed.

I recently did a 4.6 PI engine swap and with a 70mm BBK throttlebody and CAI setup.

It has a highflow catted x pipe and flowmaster mufflers. What approx should I be running in the 1/4 after gears? and then after a decent tune?

Thanks

 

Twete

Member

Aug 29, 2010

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7

Kirkland, WA

Jan 1, 2011

#2

• Jan 1, 2011

• #2

 

LarsD

Founding Member

Jul 2, 2002

2,680

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123

Texas

Jan 1, 2011

#3

• Jan 1, 2011

• #3

I agree ^^^

Just going to have to take it and find out. To many unknown factors.

 

slayerripkdc

15 Year Member

Jun 3, 2003

1,341

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59

brewster ny

Jan 1, 2011

#4

• Jan 1, 2011

• #4

Possible mid-high 13's with a really good 60ft.

 

1995GTStang

New Member

Feb 9, 2009

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Washington State

Jan 2, 2011

#5

• Jan 2, 2011

• #5

I appreciate the info..... I wish I could take it to the track. We have over 12" of standing snow on the ground and the local track is closed for season. I found a good reputable shop offering a great deal on a gear swap. Since I do drive this on the highway quite a bit I pretty much knew that 4.10's were outta the question. After doing the PI engine swap the 2.73 gears are definitely the culprit holding this car back. I do not want a racer, but I want a good launcher that I can drive on the freeway. I figured that enough people do the gear on these things that I could get a ball park figure what I would run in a 1/4 mile.

In the spring I will take it down and see what she will do....until then, I will just keep adding to the wish list....

Happy New Year all

 

Twete

Member

Aug 29, 2010

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7

Kirkland, WA

Jan 2, 2011

#6

• Jan 2, 2011

• #6

1995GTStang said:

I appreciate the info..... I wish I could take it to the track. We have over 12" of standing snow on the ground and the local track is closed for season.

Click to expand...

Are you up in the spokane area? I saw your location says washington state so I was just curious.

 

1995GTStang

New Member

Feb 9, 2009

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Washington State

Jan 2, 2011

#7

• Jan 2, 2011

• #7

When is the opening day usually for Spokane raceway?

 

1995GTStang

New Member

Feb 9, 2009

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Washington State

Jan 2, 2011

#8

• Jan 2, 2011

• #8

Yeah, pretty close....we live in Davenport, about 35 miles west of Spokane. Where are you?

 

Twete

Member

Aug 29, 2010

61

0

7

Kirkland, WA

Jan 2, 2011

#9

• Jan 2, 2011

• #9

Nice, which shop are you taking it to for the gear swap?

 

1995GTStang

New Member

Feb 9, 2009

74

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Washington State

Jan 2, 2011

#10

• Jan 2, 2011

• #10

Hills Automotive on Division
They are doing a differential gear swap and bearing replacement for about 1100.00. That is about 200.00 cheaper than any other estimate.

 

Steve491

Member

Apr 20, 2008

254

2

19

Charlotte, NC

Jan 3, 2011

#11

• Jan 3, 2011

• #11

3:73
Good for launching and OK for the freeway in 5th gear.

 

03_TrueBlue_GT

Active Member

May 5, 2010

810

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29

Houston, Tx

Jan 3, 2011

#12

• Jan 3, 2011

• #12

Steve491 said:

3:73
Good for launching and OK for the freeway in 5th gear.

Click to expand...

Yep your rpms at 65-70mph will be a hair under 2,000. I dont do a lot of higway driving due to school being closed for now so I dont know what my mpg is yet...

 

1995GTStang

New Member

Feb 9, 2009

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Washington State

Jan 7, 2011

#13

• Jan 7, 2011

• #13

Wow....major difference.....

I just got the car back from the shop yesterday. I had to have the whole differential rebuilt. But completely worth it....it is like having a new car.

I highly recommended a PI and gear swap on these....definitely awakens these cars!!!