Final Drive Gear Ratios
08-22-2007, 08:16 AM
#13
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Originally Posted by SOHCmyDOHC,Aug 21 2007, 08:12 PM
sounds close. do you have the OEM tires on there? if not, the tires could be part of the problem
Assuming the tires were a different size than stock, the RPMs and Speedo would still read the same, the car would just be travelling at a different speed than indicated.
05-10-2010, 01:24 PM
#14
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im confused what i have...at 70 mph my rpms are 4500...can someone tell me what ive got? i tried a gear ratio calc...did the tire size and everything, its saying i have 5.60 final drive...plz someone help me clarify
p.s. do they even sell 5.60???
p.s. do they even sell 5.60???
05-11-2010, 04:45 AM
#16
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Originally Posted by pyoung62,Aug 16 2007, 01:01 PM
I found an older post about final gear ratios that stated the following:
> AP#1 runs 4.1 @ 3700RPM @ 80MPH
...
> AP#1 runs 4.1 @ 3700RPM @ 80MPH
...
A stock AP1 with stock gears (4.1) turns 4,000 rpm at 75-76mph. I've never owned an AP2 so I cannot speak to them.
05-11-2010, 02:26 PM
#17
Stock AP1:
6th gear: 0.811
Secondary: 1.16
Final: 4.1
Overall: 3.857
225/50R16 rear tire nominal loaded diameter: 24.1 in.
--> 6th gear mph per 1000 rpm: 18.6
Stock AP2:
6th gear: 0.763
Secondary: 1.208
Final: 4.1
Overall: 3.779
245/40R17 rear tire nominal loaded diameter: 24.0 in.
--> 6th gear mph per 1000 rpm: 18.9
Your speedometer may vary.
6th gear: 0.811
Secondary: 1.16
Final: 4.1
Overall: 3.857
225/50R16 rear tire nominal loaded diameter: 24.1 in.
--> 6th gear mph per 1000 rpm: 18.6
Stock AP2:
6th gear: 0.763
Secondary: 1.208
Final: 4.1
Overall: 3.779
245/40R17 rear tire nominal loaded diameter: 24.0 in.
--> 6th gear mph per 1000 rpm: 18.9
Your speedometer may vary.
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