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Guest racinbird

Overall Gear Ratio from Tire Size

 

Gear Ratio = rpm x tire diameter / mph x 336

 

 

found this on the web...http://modernmusclecars.net/forums/articles.php?do=math

 

so GR = 4300 rpm x 25in tire dia (?) / 163mph x 336

 

 

GR = 107500 / 54768 = 1.96 gear ratio....so something is effy

 

 

I know a stock power LS1 with an M6 and 3.42 ratio goes only 130 at 4500 rpms. I'd say your speedo is high

 

 

Transmission Ratios:

1st: 2.68 2nd: 1.8 3rd: 1.31 4th: 1 5th: 0.75 6th: 0.5

 

Tire Diameter 1: 26 inches

Rear Gear Ratio 1: 3.42:1

MPH

RPM 1st 2nd 3rd 4th 5th 6th

1000 8 12 17 22 29 43

1500 12 18 25 33 43 65

2000 16 24 33 43 58 87

2500 20 30 41 54 72 109

3000 24 36 50 65 87 130

3500 28 42 58 76 101 152

4000 32 48 66 87 116 174

4500 36 54 75 98 130 195

5000 41 60 83 109 145 217

5500 45 66 91 119 159 239

6000 49 72 99 130 174 261

6500 53 78 108 141 188 282

7000 57 84 116 152 203 304

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