Gear Q. Are they supposed to be constant pwr or 'wind up'

FrdMustangCpe

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May 27, 2004

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Sin City, NV

Aug 17, 2004

#1

• Aug 17, 2004

• #1

im not sure if these 3.73s are supposed to be like this or not. when you step on it sometimes the hp kinda seems to free up i should say. rpms will rise, faster, when like wide open. can anyone tell me if this is right? i seems to be when the car is in lets say 2k in 3rd and you step on it. or even 2nd sometimes.

 

stockhatch

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Oct 9, 2001

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polar sloth country

Aug 17, 2004

#2

• Aug 17, 2004

• #2

With gears you should feel better pull and faster windup in all gears. Theyre always "on" IOW.

AC

 

FrdMustangCpe

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May 27, 2004

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Sin City, NV

Aug 17, 2004

#3

• Aug 17, 2004

• #3

definately still gettin better pull/windup

 

joelliott

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May 17, 2004

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Gainesville, FL

Aug 18, 2004

#4

• Aug 18, 2004

• #4

What kinda rpms are you pullin at 60mph and 80mph? I have stock 3.08 in my 85gt and wanna go with 3.73s bad. Thanks
Joe E.

 

stockhatch

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polar sloth country

Aug 18, 2004

#5

• Aug 18, 2004

• #5

I would always recommend 4.10s. Your only looking at a few hunderd RPM difference at cruise speeds. Youll notice the increased RPMs even less than I did, as I went from 2.73s to 4.10s, not 3.08s. Ill never go less than 4.10s now unless I build another turbo car.

AC

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Aug 18, 2004

#6

• Aug 18, 2004

• #6

FrdMustangCpe said:

im not sure if these 3.73s are supposed to be like this or not. when you step on it sometimes the hp kinda seems to free up i should say. rpms will rise, faster, when like wide open. can anyone tell me if this is right? i seems to be when the car is in lets say 2k in 3rd and you step on it. or even 2nd sometimes.

Click to expand...

gears offer linear advantage, but as you come into the powerband, it can feel as though it is spooling up. it is not, you are just feeling yourself get into and zip through the powerband more quickly now than you were before.

sounds like you like them.

 

stangbear427

Active Member

Nov 11, 2002

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New England

Aug 18, 2004

#7

• Aug 18, 2004

• #7

Right. All you have done is stepped up the ratio of turns of the wheel per turn of the crank. It is impossible for it to have a variance, that would involve having a rear end with multiple ratios like a transmission. What it will do is enhance your powerband exactly as it was. If your car is more low end torque than high end HP, then what you may notice is it zooms right through your powerband in no time and feel slower at the top- but that's just a matter of getting used to them and learning how to drive with them.

 

V

v8only

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Jul 3, 2003

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Aug 18, 2004

#8

• Aug 18, 2004

• #8

If your engine rpms go up super fast and your car is not moving forward that fast, your clutch may be going out.

If your nailing the gas pedal and the car is moving like a mother****er, it;s fine.

 

Michael Yount

Mustang Master

Apr 10, 2002

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Charlotte, NC

Aug 18, 2004

#9

• Aug 18, 2004

• #9

Joeelliot - it's easy to figure. It's all about simple ratios. 3.73/3.08=1.21. Your engine revs will be 21% higher than they are now. So if at 60 mph you're turning over 1500 rpm in top gear (just guessing), then you'll be turning over 21% faster with the 3.73's - about 1800 rpm.