How much are gears worth?

DarkProphet

Founding Member

Aug 19, 2002

391

0

0

Quakertown, PA

Apr 11, 2007

#1

• Apr 11, 2007

• #1

Anyone have an idea of how much time in the 1/4 you gain by going from 2.73 to 3.55 or 3.73's? I tried searching as i thought i read it before but couldnt find the post? Im especially interested in the case of my car as I have about 370ish rwhp and stock gears. At 90 im around 2500 rpms which is good if I wanted to go like 170, but Id rather pass STI's faster... Thanks.

 

JJ95GTID

Active Member

Sep 22, 2003

1,141

4

49

Phoenix, AZ

Apr 11, 2007

#2

• Apr 11, 2007

• #2

I gained nothing at the track by switching to 3.73s. Ran the same ETs before and after the gear swap.

Currently, I am shifting into fourth right at the 1000' mark which means I am no where near my peak rpm at the finish line.

 

trav_19

New Member

Oct 29, 2006

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Jackson, MI

Apr 11, 2007

#3

• Apr 11, 2007

• #3

you gained nothing from your gear swap at the track...what the...... do you have a auto or stick?? since you have a supercharger you might want to go with 3.55

 

chaos254

Founding Member

Jul 27, 2002

467

3

29

NJ

Apr 11, 2007

#4

• Apr 11, 2007

• #4

im not suprised that he didn't gain anything at the track especially since he said hes not going through the traps at the right rpm ...some people even lose a few tenths because of the shift into 4th. It's all about gearing your car for your combo!

 

reddy351

10 Year Member

Jun 13, 2006

560

12

38

Columbus, Ohio

Apr 11, 2007

#5

• Apr 11, 2007

• #5

chaos254 said:

im not suprised that he didn't gain anything at the track with a fairly stock engine ...some people even lose a few tenths because of the shift into 4th.

Click to expand...

His sig--"Explorer intake, FRPP Y303 heads, Crane 1.7:1 rr, BBK E/L headers, Pypes catted X-pipe and Violater catback"

This is a "fairly stock" engine? He's got more mods (and important ones, too) than you do. Not trying to be a d1ck, but, sheesh!!!!

 

chaos254

Founding Member

Jul 27, 2002

467

3

29

NJ

Apr 11, 2007

#6

• Apr 11, 2007

• #6

reddy351 said:

His sig--"Explorer intake, FRPP Y303 heads, Crane 1.7:1 rr, BBK E/L headers, Pypes catted X-pipe and Violater catback"

This is a "fairly stock" engine? He's got more mods (and important ones, too) than you do. Not trying to be a d1ck, but, sheesh!!!!

Click to expand...

i wrote the response quickly and just glanced over his sig lol....i tried correcting it but my internet is slow and wouldnt let me for awhile.

 

Pokageek

Active Member

Jun 10, 2005

2,767

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46

MA, USA

Apr 11, 2007

#7

• Apr 11, 2007

• #7

I am pretty sure from memory it is 1/2 the the gear. Meaning, 2.73 to 3.73's is .5 tenths or 1/2 a second with grip.

 

Adam95GT

New Member

Aug 14, 2006

2,564

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Burlington, NJ

Apr 11, 2007

#8

• Apr 11, 2007

• #8

Pokageek said:

I am pretty sure from memory it is 1/2 the the gear. Meaning, 2.73 to 3.73's is .5 tenths or 1/2 a second with grip.

Click to expand...

Stock to 3.73's ive seen .3-.5 for the most part...

 

DarkProphet

Founding Member

Aug 19, 2002

391

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0

Quakertown, PA

Apr 11, 2007

#9

• Apr 11, 2007

• #9

4th runs out somewhere near 130 i think, (not really watching the spedo when going this fast) and im sure im not going to be trapping anywhere near that high. I have no idea what kind of gain to expect as most people get gears as one of their first mods, not after a new engine and supercharger haha. Thats what happens when things break though. I hope to gain atleast .3-.5, but I guess theres only one way to find out?

 

stprorolla49

Active Member

Oct 9, 2004

1,455

15

39

Fairfield, CT/North Jersey

Apr 11, 2007

#10

• Apr 11, 2007

• #10

Yea, hopefully you will see a few tenths cut off your ET. As mentioned above, I'd also go for 3.55 gears instead of the 3.73's as they are a much better blower gear.

 

JJ95GTID

Active Member

Sep 22, 2003

1,141

4

49

Phoenix, AZ

Apr 11, 2007

#11

• Apr 11, 2007

• #11

Yes, with 3.73s no better at the track. I like many jumped right into the swap without much thought to trap speeds/rpms and my current setup. If I were to do it over I'd go with 4.30s for optimal track performance. But, now I am thinking of supercharging (centrifical type) someday and will keep the 3.73s.