HottLS1Z

iTrader: (5)

So heres the latest- Supposed to be having my 410 gears put in next weekend, but ow I'm considering just keeping 273's or Ialso have a set of GM 342's here too. Here is why, I went to the track yestrerday and with NO suspension mods what so ever not even control
arms on an ALL SEASON Kumo tire (275-35-18) on a Z-06 wheel here was my best run
with currently 273's. all passes were within a half a tenth of each other.

60'...1.728
330...4.980
1/8...7.712
mph...89.89
1000...10.062
1/4...12.062
mph...112.32

That 60' time is on the previously mentioned tire no weight reduction and completly stock suspension with the exception of a strut tower brace. what does every body think about gearing? need some opinions here. Also my Boxed LCA's arent even installed yet.

02SOMWS6

iTrader: (6)

I say go for the 3.42 . 4.10 will be too much for a street/strip car. disconnect your front sway bar for the track and you will see better 60.ft times

HottLS1Z

iTrader: (5)

Kinda what I was thinking but 410 will keep e in my powerband more...a lot more

Mooobunnny

iTrader: (1)

keep the 2.73's and put a better tire under it. I went from 2.73's to 3.73's and actually wish I did not (when my car was an auto)

Cchris1109

iTrader: (11)

i put 4.10s in my auto, it rocks

muchhh more power

i can stomp on ls1 vettes and i have shorties, exhaust, and a tune

HottLS1Z

iTrader: (5)

I think i'm gonna try 410 then if There too much or they break (They probably will) I'll try 342 but I had 10's in my 98Z with bolt ons stock cam and stall ant that car was a beast for an a4.

02 wife

Keep the 2.73's!

HottLS1Z

iTrader: (5)

reasons with opinions people please!

Turo

iTrader: (23)

Not sure, but I think 4.10's with an A4 and 26" tires may be too much gear, you may shift into 4th at the track. I would go 3.73's personally, should put you in the powerband better with the MS3 and still keep you out of OD without having to move up to a taller tire. I could be wrong though, someone correct me if I am (I'm an M6 guy).

Mooobunnny

iTrader: (1)

I had a Midwest ~3500rpm 2.1 str stall and pulled consistant high 1.6 60 fts and ran 12.4 to 12.6 with just a few bolt-ons and 2.73 gears. I moved to 3.73 gears and the car went 12.7 to 12.9's with mid-high 1.7 60 fts dead hooking on the same slicks as the 2.73's. I added a catback exhaust, mild weight reduction, and a tune all to run 12.6's and never run as fast as I was before the gear change. Very similar DA's at the same track too. I guess maybe my converter just liked having the extra strain of the 2.73 gearing, but either way I wish I would have stayed with them. Now I have a 6 speed and I wish I had more gear than the 3.73's but that is on hold until I put in a 9" or a D60.

The 2.73's also did amazing on the street...MUCH easier to hook on street tires. I went 1.78 in the 60' with 245 Kuhmo 712's on stock 16" wheels.

UL LOSE

go 4.10s,the ms3 will love that gear. With 6800rpm shift points you can run 123mph in 3rd gear. So you will not run out of gear! With a 3500stall and that cam,with 4.10s you'll be running 11.5s-11.6s for sure. If you plan on spraying though go 3.73s.
Good Luck!

HottLS1Z

iTrader: (5)

Thats what I'm looking for 11.5's is good enough for me. Spray maybe next year when I have the trans built up for more power and have the converter re stalled to a 4400 at which point I'll probably need a better rear end.

UL LOSE

You dont wanna have a 4400 with spray either though,I wouldnt go higher than 3600. Spraying id run a 3600/3.73 setup,N/A id run a 4000-4400/4.10s setup with your cam! Itll feel like a totally different car either way! I cant explain how important gears are for that cam! Good Luck!

HottLS1Z

iTrader: (5)

Well 410's Sub Frames & LCA's and Ported TB going in next week so if I can manage to hook the car with those gears I'll Post the new results.

UL LOSE

Dont worry it'll hook as long as you're not on street tires! Ill be waiting to see those times!

whiteLS1

iTrader: (15)

go with 3.42's i did this in my last ls1 and it was the best mod. gas mileage didnt change it cruised better and it picked up 3th's in the 1/4 with out a stall

4.10 are way to much its an over kill in an auto STREET car. i think its retarded to go that big.

UL LOSE

Everybody has their own opinion. I think 4.10s are perfect with the ms3 n/a

408 z28

iTrader: (1)

im into 4 gear at the end of the track with 3.42's in my m6 car...im hoping to be at the top of fourth gear with some 4.10's at the end of the track...then again us m6 guys do have that extra gear

1FSTZ71

iTrader: (11)

RPM 1 2 3 4
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 34
1400 8 16 26 37
1500 9 17 28 40
1600 10 18 30 42
1700 10 19 32 45
1800 11 21 33 48
1900 12 22 35 50
2000 12 23 37 53
2100 13 24 39 56
2200 13 25 41 58
2300 14 26 43 61
2400 15 27 45 64
2500 15 29 46 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 59 85
3300 20 38 61 87
3400 21 39 63 90
3500 21 40 65 93
3600 22 41 67 95
3700 22 42 69 98
3800 23 44 71 101
3900 24 45 72 103
4000 24 46 74 106
4100 25 47 76 109
4200 25 48 78 111
4300 26 49 80 114
4400 27 50 82 117
4500 27 52 84 119
4600 28 53 85 122
4700 29 54 87 125
4800 29 55 89 127
4900 30 56 91 130
5000 30 57 93 133
5100 31 58 95 135
5200 32 60 97 138
5300 32 61 98 141
5400 33 62 100 143
5500 33 63 102 146
5600 34 64 104 148
5700 35 65 106 151
5800 35 66 108 154
5900 36 68 110 156
6000 36 69 111 159
6100 37 70 113 162
6200 38 71 115 164
6300 38 72 117 167
6400 39 73 119 170
6500 39 74 121 172
6600 40 76 122 175
6700 41 77 124 178
6800 41 78 126 180
6900 42 79 128 183
7000 42 80 130 186


This is your MPH in every gear at certain RPM's with 4.10's and your 275/35/18 tire

3.42's
RPM 1 2 3 4
500 4 7 11 16
600 4 8 13 19
700 5 10 16 22
800 6 11 18 25
900 7 12 20 29
1000 7 14 22 32
1100 8 15 24 35
1200 9 16 27 38
1300 9 18 29 41
1400 10 19 31 45
1500 11 21 33 48
1600 12 22 36 51
1700 12 23 38 54
1800 13 25 40 57
1900 14 26 42 60
2000 15 27 45 64
2100 15 29 47 67
2200 16 30 49 70
2300 17 32 51 73
2400 17 33 53 76
2500 18 34 56 79
2600 19 36 58 83
2700 20 37 60 86
2800 20 38 62 89
2900 21 40 65 92
3000 22 41 67 95
3100 23 43 69 99
3200 23 44 71 102
3300 24 45 73 105
3400 25 47 76 108
3500 25 48 78 111
3600 26 49 80 114
3700 27 51 82 118
3800 28 52 85 121
3900 28 54 87 124
4000 29 55 89 127
4100 30 56 91 130
4200 31 58 93 134
4300 31 59 96 137
4400 32 60 98 140
4500 33 62 100 143
4600 33 63 102 146
4700 34 65 105 149
4800 35 66 107 153
4900 36 67 109 156
5000 36 69 111 159
5100 37 70 113 162
5200 38 71 116 165
5300 39 73 118 168
5400 39 74 120 172
5500 40 76 122 175
5600 41 77 125 178
5700 41 78 127 181
5800 42 80 129 184
5900 43 81 131 188
6000 44 82 134 191
6100 44 84 136 194
6200 45 85 138 197
6300 46 87 140 200
6400 47 88 142 203
6500 47 89 145 207
6600 48 91 147 210
6700 49 92 149 213
6800 49 93 151 216
6900 50 95 154 219
7000 51 96 156 223


Your 2.73's
RPM 1 2 3 4
500 5 9 14 20
600 5 10 17 24
700 6 12 20 28
800 7 14 22 32
900 8 15 25 36
1000 9 17 28 40
1100 10 19 31 44
1200 11 21 33 48
1300 12 22 36 52
1400 13 24 39 56
1500 14 26 42 60
1600 15 28 45 64
1700 15 29 47 68
1800 16 31 50 72
1900 17 33 53 76
2000 18 34 56 80
2100 19 36 59 84
2200 20 38 61 88
2300 21 40 64 92
2400 22 41 67 96
2500 23 43 70 100
2600 24 45 72 104
2700 25 46 75 108
2800 26 48 78 111
2900 26 50 81 115
3000 27 52 84 119
3100 28 53 86 123
3200 29 55 89 127
3300 30 57 92 131
3400 31 59 95 135
3500 32 60 98 139
3600 33 62 100 143
3700 34 64 103 147
3800 35 65 106 151
3900 36 67 109 155
4000 36 69 111 159
4100 37 71 114 163
4200 38 72 117 167
4300 39 74 120 171
4400 40 76 123 175
4500 41 77 125 179
4600 42 79 128 183
4700 43 81 131 187
4800 44 83 134 191
4900 45 84 137 195
5000 46 86 139 199
5100 46 88 142 203
5200 47 89 145 207
5300 48 91 148 211
5400 49 93 151 215
5500 50 95 153 219
5600 51 96 156 223
5700 52 98 159 227
5800 53 100 162 231
5900 54 102 164 235
6000 55 103 167 239
6100 56 105 170 243
6200 56 107 173 247
6300 57 108 176 251
6400 58 110 178 255
6500 59 112 181 259
6600 60 114 184 263
6700 61 115 187 267
6800 62 117 190 271
6900 63 119 192 275
7000 64 120 195 279

These calculations are almost dead accurate (used them when choosing gears for the truck). Where are your shift points? If you shift above 6500rpm your are still in 2nd gear crossing the traps.