Traitor LS1

I have a 2000 Z28 (A4) and I was wondering what gears should I put in it I love freeway pulls, I would like to still be able to hit 145 or so and be able to get a ton better acceleration than my 2.73's

presto_z

iTrader: (12)

m6 conversion

Z28LS1camaroguy

iTrader: (3)

3.73s or if you dont want to go that big you can always get 3.23s, and how fast do you drive on the highway lol. do you regularly hit 145??? if so how many tickets have you got lol.

gnbooster87

iTrader: (6)

3:23s or 3:73s, nothing higher than this

SVT THIS

iTrader: (27)

3.73s if you want to be a ***** about it
I'm going to be running 4.10s on my DD though. However, the HW I drive on has a 55mph speedlimit so it won't be to bad. Do you have a stall converter yet? If not, that will help out with your acceleration quite abit.

300bhp/ton

Gears are a big issue. And mostly because of the 4l60e it's only a 3 speed auto with overdrive. WOT shifting from 3-4th is apparantly bad, as are WOT kickdowns from 4th to 2nd or 1st. This means you have to use 3rd as your primary gear unless you are just crusing.

So the red line/rpm limter in 3rd will be your top speed.

If the tranny was a porper 4 speed then no questions 4.10's would be the way.

But assuming stock tyre diameter and stock rpm limiter 4.10's will only take you to around 110mph before your out of gear. Even with a cammed setup and a limiter of 6500rpm you'll still only see ~120mph.

So for this reason I would never go with 4.10's.

3.73's are a little better:

6000rpm = 123mph
6500rpm = 133mph

Personally I like 2.73's, 80mph is only 2000rpm in top. And from a roll they work great, they don't have the dead spot like the 3.23's have. But yes "in-gear" accelaration will be less with them.

3.23's are IMO about the worse gear for an auto. It has dead spots all over the show and right where you are likely to roll race from. From a dig they will out perform a 2.73 car but I quite firmly believe that from a roll or just shear driving enjoyment that the 2.73 is the better.

This really leaves only 3.42's looking at the stats these will still have a bit of a dead spot at aroud 35-40mph. This is because you are too high in the revs to kickdown to 1st so it will only kick down to 2nd which will be 2500-2900rpm, so well out of the optimum power band. But IMO they are much better than 3.23's which have several dead spots. The 3.42's should only have that one area, so you'd just need to remember to not race from that speed, either make it sub 35mph start or nearer 50mph.

Top speed is also good with the 3.42's:

6000rpm = 134mph
6500rpm = 145mph

I do agree a stall would be a good choice (personally I'd look at a mininum of ~3500rpm).

But it depends largly on your setup. A wild n/a cam setup will require a mininum of 3.42's just to keep the cam in the power band.

But I will be honest I do love the ability to pull out on a section of road and hammer it until the speed limiter kicks in at 158mph. And the 2.73's are the only gears capable of doing this.

If I was to go FI (turbo) then I'd seriously look at running 3.08 gears, these are only available on 12 bolts not 10 bolts though.

300bhp/ton

MPH vs RPM

Assuming Tyre diameter of 25.66"

1st gear = 3.06:1
2nd gear = 1.62:1
3rd gear = 1.00:1 (this is the gear to use for racing)
4th hear = 0.70:1 (Overdrive)

2.73:1 Final Drive Ratio

RPM 1st 2nd 3rd 4th
500 5 9 14 20
600 5 10 17 24
700 6 12 20 28
800 7 14 22 32
900 8 16 25 36
1000 9 17 28 40
1100 10 19 31 44
1200 11 21 34 48
1300 12 22 36 52
1400 13 24 39 56
1500 14 26 42 60
1600 15 28 45 64
1700 16 29 48 68
1800 16 31 50 72
1900 17 33 53 76
2000 18 35 56 80
2100 19 36 59 84
2200 20 38 62 88
2300 21 40 64 92
2400 22 41 67 96
2500 23 43 70 100
2600 24 45 73 104
2700 25 47 75 108
2800 26 48 78 112
2900 27 50 81 116
3000 27 52 84 120
3100 28 54 87 124
3200 29 55 89 128
3300 30 57 92 132
3400 31 59 95 136
3500 32 60 98 140
3600 33 62 101 144
3700 34 64 103 148
3800 35 66 106 152
3900 36 67 109 156
4000 37 69 112 160
4100 37 71 115 164
4200 38 72 117 168
4300 39 74 120 172
4400 40 76 123 176
4500 41 78 126 180
4600 42 79 129 184
4700 43 81 131 188
4800 44 83 134 192
4900 45 85 137 196
5000 46 86 140 200
5100 47 88 143 204
5200 48 90 145 208
5300 48 91 148 212
5400 49 93 151 216
5500 50 95 154 220
5600 51 97 157 224
5700 52 98 159 228
5800 53 100 162 232
5900 54 102 165 236
6000 55 104 168 240
6100 56 105 171 244
6200 57 107 173 248
6300 58 109 176 252
6400 58 110 179 256
6500 59 112 182 260
6600 60 114 185 264
6700 61 116 187 268
6800 62 117 190 272
6900 63 119 193 276
7000 64 121 196 280


3.23:1 Final Drive Ratio

RPM 1st 2nd 3rd 4th
500 4 7 12 17
600 5 9 14 20
700 5 10 17 24
800 6 12 19 27
900 7 13 21 30
1000 8 15 24 34
1100 8 16 26 37
1200 9 18 28 41
1300 10 19 31 44
1400 11 20 33 47
1500 12 22 35 51
1600 12 23 38 54
1700 13 25 40 57
1800 14 26 43 61
1900 15 28 45 64
2000 15 29 47 68
2100 16 31 50 71
2200 17 32 52 74
2300 18 34 54 78
2400 19 35 57 81
2500 19 36 59 84
2600 20 38 61 88
2700 21 39 64 91
2800 22 41 66 95
2900 22 42 69 98
3000 23 44 71 101
3100 24 45 73 105
3200 25 47 76 108
3300 25 48 78 111
3400 26 50 80 115
3500 27 51 83 118
3600 28 53 85 122
3700 29 54 87 125
3800 29 55 90 128
3900 30 57 92 132
4000 31 58 95 135
4100 32 60 97 138
4200 32 61 99 142
4300 33 63 102 145
4400 34 64 104 149
4500 35 66 106 152
4600 36 67 109 155
4700 36 69 111 159
4800 37 70 113 162
4900 38 71 116 165
5000 39 73 118 169
5100 39 74 121 172
5200 40 76 123 176
5300 41 77 125 179
5400 42 79 128 182
5500 42 80 130 186
5600 43 82 132 189
5700 44 83 135 192
5800 45 85 137 196
5900 46 86 139 199
6000 46 88 142 203
6100 47 89 144 206
6200 48 90 147 209
6300 49 92 149 213
6400 49 93 151 216
6500 50 95 154 219
6600 51 96 156 223
6700 52 98 158 226
6800 53 99 161 230
6900 53 101 163 233
7000 54 102 165 236


3.73:1 Final Drive Ratio

RPM 1st 2nd 3rd 4th
500 3 6 10 15
600 4 8 12 18
700 5 9 14 20
800 5 10 16 23
900 6 11 18 26
1000 7 13 20 29
1100 7 14 23 32
1200 8 15 25 35
1300 9 16 27 38
1400 9 18 29 41
1500 10 19 31 44
1600 11 20 33 47
1700 11 21 35 50
1800 12 23 37 53
1900 13 24 39 56
2000 13 25 41 58
2100 14 27 43 61
2200 15 28 45 64
2300 15 29 47 67
2400 16 30 49 70
2500 17 32 51 73
2600 17 33 53 76
2700 18 34 55 79
2800 19 35 57 82
2900 19 37 59 85
3000 20 38 61 88
3100 21 39 63 91
3200 21 40 65 94
3300 22 42 68 96
3400 23 43 70 99
3500 23 44 72 102
3600 24 45 74 105
3700 25 47 76 108
3800 25 48 78 111
3900 26 49 80 114
4000 27 51 82 117
4100 27 52 84 120
4200 28 53 86 123
4300 29 54 88 126
4400 29 56 90 129
4500 30 57 92 132
4600 31 58 94 134
4700 31 59 96 137
4800 32 61 98 140
4900 33 62 100 143
5000 33 63 102 146
5100 34 64 104 149
5200 35 66 106 152
5300 35 67 108 155
5400 36 68 111 158
5500 37 69 113 161
5600 37 71 115 164
5700 38 72 117 167
5800 39 73 119 170
5900 39 75 121 172
6000 40 76 123 175
6100 41 77 125 178
6200 41 78 127 181
6300 42 80 129 184
6400 43 81 131 187
6500 43 82 133 190
6600 44 83 135 193
6700 45 85 137 196
6800 45 86 139 199
6900 46 87 141 202
7000 47 88 143 205


4.10:1 Final Drive Ratio

RPM 1st 2nd 3rd 4th
500 3 6 9 13
600 4 7 11 16
700 4 8 13 19
800 5 9 15 21
900 5 10 17 24
1000 6 11 19 27
1100 7 13 20 29
1200 7 14 22 32
1300 8 15 24 35
1400 9 16 26 37
1500 9 17 28 40
1600 10 18 30 43
1700 10 20 32 45
1800 11 21 34 48
1900 12 22 35 51
2000 12 23 37 53
2100 13 24 39 56
2200 13 25 41 59
2300 14 26 43 61
2400 15 28 45 64
2500 15 29 47 66
2600 16 30 48 69
2700 16 31 50 72
2800 17 32 52 74
2900 18 33 54 77
3000 18 34 56 80
3100 19 36 58 82
3200 19 37 60 85
3300 20 38 61 88
3400 21 39 63 90
3500 21 40 65 93
3600 22 41 67 96
3700 23 43 69 98
3800 23 44 71 101
3900 24 45 73 104
4000 24 46 74 106
4100 25 47 76 109
4200 26 48 78 112
4300 26 49 80 114
4400 27 51 82 117
4500 27 52 84 120
4600 28 53 86 122
4700 29 54 88 125
4800 29 55 89 128
4900 30 56 91 130
5000 30 57 93 133
5100 31 59 95 136
5200 32 60 97 138
5300 32 61 99 141
5400 33 62 101 144
5500 33 63 102 146
5600 34 64 104 149
5700 35 66 106 152
5800 35 67 108 154
5900 36 68 110 157
6000 37 69 112 160
6100 37 70 114 162
6200 38 71 115 165
6300 38 72 117 168
6400 39 74 119 170
6500 40 75 121 173
6600 40 76 123 176
6700 41 77 125 178
6800 41 78 127 181
6900 42 79 128 184
7000 43 80 130 186