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Registered
Join Date: Jun 2010
Location: Hudson Valley NY
Posts: 728
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Final thought on gears. I am leaning in to swapping out my 5th gear only. You guys have all read why. I have rear tires that are 225/50R16 so I think that means that my circumference is 24.86" or say 25".
I like my gears except for highway and realize 1st is only good for my driveway so 2 thru 4th are my normal drive around gears. 5th needs to be tall to solve my issues. A G5050 5th gear is usually .767 with a final drive ration of 3.44. My G5001 has the same drive ratio but the 5th gear is .89
A comfortable driving rpm on the highway should be around 2500. At 3000 rpm my g5001 is at 73 MPH. With a G5050 5th gear it would be at 85 and with an aftermarket gear that will probably make some noise using a .656 gives me 99 MPM. Dropping down to 2000 RPM with a .656 gives me 69 MPH. That seems nice and quiet for the highway. 2500 is at 86 MPH with a switch out of my 5th to .656
I know the drop in noise from the rpm will be nice but will that be out weighed by the gear noise. I like the rpm drop more then what I see with the G5050. Let me know what you think. It is winter time - time to do a switch...
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1989 911 LS1
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