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My track experience is limited to outings with a modded 3-series with an automatic. I had a chance to take the Boss out yesterday before Steeda began their work today. To my untrained hand, the gearing feels close. I assume that benefits the car on the track allowing the driver to stay on top of the power band.
As mods increase HP to 500+, is their any benefit from looser spacing? Below are the speeds @7500 rpm for the stock trans/wheels vs the T-56 transmission at various axle ratios with 20" wheels. If I were to swap out to a T-56 transmission, would the bolded ratio ruin the car for track work?
Gear Stock |T-56 (Drag Ratio) |T-56 (Close Ratio)
@rpm 7500 |7500 7500 7500 |7500 7500 7500
@axle 3.73 |3.73 4.1 4.56 |3.73 4.1 4.56
1 44 |58 53 47 |60 55 49
2 66 |82 74 67 |90 82 73
3 95 |118 107 96 |123 112 100
4 122 |172 156 140 |160 145 131
5 161 |232 211 190 |216 196 176
6 247 |343 312 281 |319 290 261
As mods increase HP to 500+, is their any benefit from looser spacing? Below are the speeds @7500 rpm for the stock trans/wheels vs the T-56 transmission at various axle ratios with 20" wheels. If I were to swap out to a T-56 transmission, would the bolded ratio ruin the car for track work?
Gear Stock |T-56 (Drag Ratio) |T-56 (Close Ratio)
@rpm 7500 |7500 7500 7500 |7500 7500 7500
@axle 3.73 |3.73 4.1 4.56 |3.73 4.1 4.56
1 44 |58 53 47 |60 55 49
2 66 |82 74 67 |90 82 73
3 95 |118 107 96 |123 112 100
4 122 |172 156 140 |160 145 131
5 161 |232 211 190 |216 196 176
6 247 |343 312 281 |319 290 261