3:73 rpm's
06-13-2008, 04:28 PM
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Car: 92' RS 25Th Anniversary
Engine: 305ci TBI
Transmission: 700R4
Axle/Gears: 10 bolt limited slip.
3:73 rpm's
What would my tach be at if I were to cruise at 60 with 3:73's and the 700R4????
06-13-2008, 04:51 PM
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Car: 92' RS 25Th Anniversary
Engine: 305ci TBI
Transmission: 700R4
Axle/Gears: 10 bolt limited slip.
Re: 3:73 rpm's
Im not sure exactly what the tire size is but I know I have 16" rims. Im sure that their the factory tire size.
06-13-2008, 05:02 PM
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Car: 1991 Z28 1LE
Engine: 370CID GenIII
Transmission: 4l60e
Axle/Gears: 4.33 Moser 9inch
Re: 3:73 rpm's
if u have 245/50/r16 tires in overdrive at 60 u will do about 2000-2100 rpms if my math is correct...
kewl
06-14-2008, 06:41 AM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: 3:73 rpm's
I got 245/50/16 and 3.73's...will let you knowtoday or tomorrow!!
Last edited by patricktroyz28; 06-14-2008 at 06:46 AM.
06-14-2008, 10:21 AM
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Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: 3:73 rpm's
when I had 3.73 at 60 I was doing 1800-1900 With the 3.90s right now I am doing a little under 2000 at 60 mph
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06-16-2008, 10:43 AM
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Re: 3:73 rpm's
With 25.7" tires (245/50/16), and the 700R4 in overdrive at 60 MPH you would rev the following;
2.73 -> 1500
3.08 -> 1690
3.23 -> 1775
3.42 -> 1880
3.73 -> 2050
4.10 -> 2250
4.56 -> 2500
2.73 -> 1500
3.08 -> 1690
3.23 -> 1775
3.42 -> 1880
3.73 -> 2050
4.10 -> 2250
4.56 -> 2500
06-18-2008, 09:50 PM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: 3:73 rpm's
mine at 60 mph was 2100 in drive and 3100 in od with auto tranny.
06-19-2008, 02:30 PM
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Car: 1985 IROC-Z
Engine: 305 H.O.
Transmission: 5 Speed
Axle/Gears: 7.5" 10 bolt, 4.10, torsen posi
Re: 3:73 rpm's
RPM = MPH X Final drive ratio X 336 / Tire diameter
Tire diameter = 2 X Section width X Aspect ratio / 2540 + Wheel diameter
245(section width)/50(aspect ratio)/16(wheel diameter)
so the tire diameter is 25.65 (2 x 245 x 50/2540 + 16 )
and the rpm is 2052 (60 x (3.73 x .7) x 336 / 25.65)
Tire diameter = 2 X Section width X Aspect ratio / 2540 + Wheel diameter
245(section width)/50(aspect ratio)/16(wheel diameter)
so the tire diameter is 25.65 (2 x 245 x 50/2540 + 16 )
and the rpm is 2052 (60 x (3.73 x .7) x 336 / 25.65)
06-21-2008, 05:41 PM
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Car: 92' RS 25Th Anniversary
Engine: 305ci TBI
Transmission: 700R4
Axle/Gears: 10 bolt limited slip.
Re: 3:73 rpm's
thanks, so has anyone used 3:23's??? how bout some opinions
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