Want to know the Effect of Changing Gear Ratios? Look Here First!

[Roarin_8]

Go with a 4000+ stall

[davered00ss]

What about 4.30's in a t56?

[Roarin_8]

With what size tire?

[davered00ss]

275/40 17's stock SS rims & tires.

[Roarin_8]

What RPM do you shift at 6000 or higher?

[davered00ss]

6500rpm

[Roarin_8]

Here you go, this should be pretty close

Looks like cruising at 70 you'll be at about 2000rpms in 6th and will be able to take the car to 156 at the top of 5th.

RPM 1 2 3 4 5th 6th
500 3 5 7 9 12 18
600 4 6 8 11 14 21
700 5 7 10 12 17 25
800 5 8 11 14 19 28
900 6 9 12 16 22 32
1000 7 10 14 18 24 36
1100 7 11 15 20 26 39
1200 8 12 16 21 29 43
1300 9 13 18 23 31 46
1400 9 14 19 25 34 50
1500 10 15 20 27 36 53
1600 11 16 22 28 38 57
1700 11 17 23 30 41 60
1800 12 18 25 32 43 64
1900 13 19 26 34 46 67
2000 13 20 27 36 48 71
2100 14 21 29 37 50 75
2200 15 22 30 39 53 78
2300 15 23 31 41 55 82
2400 16 24 33 43 58 85
2500 17 25 34 44 60 89
2600 17 26 36 46 62 92
2700 18 27 37 48 65 96
2800 19 28 38 50 67 99
2900 19 29 40 51 70 103
3000 20 30 41 53 72 107
3100 21 31 42 55 74 110
3200 21 32 44 57 77 114
3300 22 33 45 59 79 117
3400 23 34 46 60 82 121
3500 23 35 48 62 84 124
3600 24 36 49 64 86 128
3700 25 37 51 66 89 131
3800 25 38 52 67 91 135
3900 26 39 53 69 94 138
4000 27 40 55 71 96 142
4100 27 41 56 73 98 146
4200 28 42 57 75 101 149
4300 29 43 59 76 103 153
4400 29 44 60 78 106 156
4500 30 45 61 80 108 160
4600 31 46 63 82 110 163
4700 31 47 64 83 113 167
4800 32 48 66 85 115 170
4900 33 49 67 87 118 174
5000 33 50 68 89 120 178
5100 34 51 70 91 122 181
5200 35 52 71 92 125 185
5300 35 53 72 94 127 188
5400 36 54 74 96 130 192
5500 37 55 75 98 132 195
5600 37 56 76 99 134 199
5700 38 57 78 101 137 202
5800 39 58 79 103 139 206
5900 39 59 81 105 142 209
6000 40 60 82 107 144 213
6100 41 61 83 108 146 217
6200 41 62 85 110 149 220
6300 42 63 86 112 151 224
6400 43 64 87 114 154 227
6500 43 65 89 115 156 231

[davered00ss]

Thanks, Looks like it will not work for me in the 1/4.

[Roarin_8]

What are you trying to do? In some setups the manuals go with 4.56s, all depends on the setup.

[davered00ss]

Nothing. Just had a deal on a moser 12 bolt with 4.30's in it. Deal got screwed anyway.

[davered00ss]

I would have just put 4.10's in it if I had bought it.

[Roarin_8]

Yeah you're better with the 4.10s unless it's just a drag car, then go 4.56s

[staringback05]

id like to hear what most gains are gonna be from a 2.73 gear to a 3.73 gear....on a a4 bolt on car...

[Roarin_8]

This thread isn't really for gains but more on how changing the gears will affect your cruise speeds and what mph you'll be at when the trans shifts at WOT. I believe that there was a thread stating the gains going from 2.73s to 3.73s somewhere.

[germeezy1]

C5 A4's either have a 2.73 or 3.15 rear end gear
The M6 cars came with 3.42 gears. With an A4 C5 a stall is going to give you alot more than the gears will unless you go over 3.73's. Vettes are not known for traction off the line so a stall helps because it takes away alot of the rpm dropoff on shifts.

[moneypit00]

Just for those wanting to know! I've got a 4.30 gear in a moser 9" T-56. I think this setep sucks. Just too steep. I gotta get in that 9" anyway since my proposi took a dump on me. I didn't like 4.10 because here highway speed is 65, so you can get away with cruising at 70. Downshifting to 3rd at 70mph is too much but 4th isn't enough. Guess I'll be looking at the 3.90 gear.

[dragracer44life]

well im goin form 2.73 to .4.10 this week oooo yeaaaaaaaaaaaa hold on

[LilJayV10]

Originally Posted by moneypit00

Just for those wanting to know! I've got a 4.30 gear in a moser 9" T-56. I think this setep sucks. Just too steep. I gotta get in that 9" anyway since my proposi took a dump on me. I didn't like 4.10 because here highway speed is 65, so you can get away with cruising at 70. Downshifting to 3rd at 70mph is too much but 4th isn't enough. Guess I'll be looking at the 3.90 gear.

Moneypit,

I was going to ask if there where any drawbacks to the 4.10's.

Is there any other M6 guys w/ 4.10's? I am use to stalled A4's.

I don't think that 1st gear is real quick w/ 3.42's.

[Elcaballoloco]

hey all....i read through to make sure i wouldnt look like an ass posting this....if i slap 4.30s in a bone stock 10 bolt behind an m6 on a 98 ta with just bolt ons no cam, how hard will that be on everything.
tire size will either be
a. 315 m/t drag radial
or
b. stock 245 series
its a dd which get a moderate amount of track time and plenty of running cars from light to light but no road trips

[Justanotherracecar]

where is the chart for A3's??