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which gears are best for highway racing/speed?

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Old 09-08-2003, 05:27 PM   #1
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Default which gears are best for highway racing/speed?

i'm not really too concerned w/ 1/4 mile time.. i enjoy good top end more.. if i go w/ 4.10's will it make 4th gear weaker.. and what will each gear top out at.. i usually wont go over 120

also for daily driving.. i've heard 4.10's will sit at 2k rpm in 6th gear going 80 which isn't bad i think
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Old 09-08-2003, 05:36 PM   #2
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Default Re: which gears are best for highway racing/speed?

Id say 4.10's are good but also look at 3.73's they work well with 6 speeds too.If your going to get gears and you have a 6 speed I say go with 4.10's they will wake your car up a lot.What mods do you plan on doing?I say go with 4.10's if your planning on getting gears.
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Old 09-08-2003, 05:39 PM   #3
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Default Re: which gears are best for highway racing/speed?

lol.. yeah i plan on gears.. heh.. other then that nothing real serious just headers, ls6 intake, lil bit of tuning and i think that'll be fast enough for me
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Old 09-08-2003, 07:21 PM   #4
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Default Re: which gears are best for highway racing/speed?

If you are not concerned with the 1/4 mile stay away from 4.10's. 4.10's are for low end torque, and great for the 1/4 mile. If you're thinkin' about racing on the highway, say 100+mph, then just leave it stock. I've quickly run 150+mph on my stock rearend, just my opinion
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Old 09-08-2003, 10:26 PM   #5
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Default Re: which gears are best for highway racing/speed?

3.73s are the perfect street/strip gears, IMO.
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Old 09-09-2003, 12:33 AM   #6
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Default Re: which gears are best for highway racing/speed?

What gears are best depends on from what speed to what speed you'll be racing from and to.

The gear ratios in your T56 tranny are as follows...

1st - 2.66
2nd - 1.78
3rd - 1.30
4th - 1.00
5th - .74
6th - .50

I'll assume a rev limiter of 6250 and a tire height of 25.66. From this we see that our top speeds by gear for a 4.10 ring and pinion are...

1st-43
2nd-65
3rd-89
4th-116
5th-157
6th-232

BTW, at 80 MPH in 6th gear, you'll be turning 2147 MPH.

If you want me to figure all of this for 3.73 gears, lemme know.
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Old 09-09-2003, 12:38 AM   #7
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Default Re: which gears are best for highway racing/speed?

I would like to know the ratios on 3.73 actually.
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Old 09-09-2003, 12:06 PM   #8
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Default Re: which gears are best for highway racing/speed?

Quote:
3.73s are the perfect street/strip gears, IMO.
What he said!
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Old 09-09-2003, 12:34 PM   #9
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Default Re: which gears are best for highway racing/speed?

I love the 4.10's

4.10's w/ Drag Radials
3.73's w/ Street Tires (4.10's shred them up)
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Old 09-09-2003, 02:56 PM   #10
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Default Re: which gears are best for highway racing/speed?

Quote:
I would like to know the ratios on 3.73 actually.
Ok, take all of those MPHs by gear I gave for 4.10s and multiply them by 1.0991957104557640750670241286863

Of course, multiplying by 1.1 will get you really close.
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(It was also the 2nd internally stock in the 11s and the 1st internally stock in the 10s on N2O.)
2002 Z28 A4 3525 lbs, 3.23 gears, TCI 3500 stall, worked LS6 heads/Stealth II cam
Best times-60FT 1.55 (17" Nittos) 1/4 11.20/121.47
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