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  #16  
Old 11-14-2006, 08:11 AM
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72' Stang 351 H/O 72' Stang 351 H/O is offline
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Re: checking Gear ratio
Quote:
Originally Posted by SkylineUSA
Drive the car in 4th gear(if its a manual) going 60mph, let me know what RPM you are at and I can tell you what ratio you are.
That work on every car?
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  #17  
Old 11-14-2006, 12:56 PM
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Re: checking Gear ratio
Quote:
Originally Posted by 72' Stang 351 H/O
That work on every car?
Yes, as far as I know. If not, pretty darn close.

I also need to know how tall the back tires are. Should be 26" for a Mustang.
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  #18  
Old 11-15-2006, 07:47 PM
BiGwiLLswiLLy BiGwiLLswiLLy is offline
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Re: checking Gear ratio
ok ill do that as soon as the weather lets up here ill go out and let you know....thanx
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Old 11-23-2006, 09:31 AM
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Re: checking Gear ratio
Quote:
Originally Posted by BiGwiLLswiLLy
ive never heard of that being done before....but if its true then on the first wheel the driveshaft spun twice on the other it spun 2 more times...so thats 4 times total for 1 tire rotation on each side, whats the gear ratio?
Are you sure that the drive shaft is spinning 2 full rotations from a full rotation of each wheel? e If the first wheel spins the drive shaft 2 and a fraction ,and the second wheel spins it 2 exactly they are probably 4.11's alittle less than 2 full rotations of the shaft from one tire and 2 full rotations from the other would probably be 3.73's.
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  #20  
Old 11-23-2006, 09:48 AM
mustangmike351c mustangmike351c is offline
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Re: checking Gear ratio
just pull the cover off if you really what to know! if not you hold one wheel and spin the other one turn and count drive shaft revolutions car in neutral if its 4.11:1 thats 1 tire rotation to 4.11 drive shaft revolutions
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  #21  
Old 11-25-2006, 05:52 PM
BiGwiLLswiLLy BiGwiLLswiLLy is offline
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Re: checking Gear ratio
At 60 mph im at about 3000 rpm in 4th gear...
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  #22  
Old 11-26-2006, 03:19 AM
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Re: checking Gear ratio
rpm x tire diameter
Gear ratio x 336


You have 3.73ish I am going off of a 26 diameter tire.

Math does not lie!
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  #23  
Old 11-27-2006, 07:00 PM
BiGwiLLswiLLy BiGwiLLswiLLy is offline
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Re: checking Gear ratio
i believe the stock tire size is about 26in dia. thats pretty cool though.
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  #24  
Old 11-22-2011, 10:51 AM
dj_andel dj_andel is offline
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Re: checking Gear ratio
Have you seen this gear ratio calculator?

http://www.cargister.com/calculator-gear
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