Gearing

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bdusted440

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If I’m hitting 6200 RPM which is my red line 200 to 300 feet before the trap with a set of 430 gears 275 6015 drag radials what should I step down to like 410s?
 
Does it quit making power at 6200? Not knowing your build, maybe up the red line? Or 4.10's will probably get you there.
 
To get 10 more mph the gear it would be 3.97 so I would go 3.91
Without much info I just used 6200 rpm and 28" tires 120 mph = 4.31 gear
put in 130 mph and it said 3.97 gear
 
If it's auto, what is your convertor slippage? You should be able to calculate it.
 
If it's auto, what is your convertor slippage? You should be able to calculate it.
Not sure I went to Midwest converters and they gave them all the specs of my motor trans and rear end in car and they build me a converter . supposed to be a 3000 stall that’s about where it stalls at.
 
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