At 09:01 am 7/23/97 MST, you wrote:
>
>>>which is supposed to have "World Class" specs but has the ultra
>>>tall .63 5th gear. How much modification could this setup stand
>>>and still run down the road at 70 MPH it 5th. I would like lots of
>>>torque and good power but am worried about drivability with this
>>>real wide ratio gear box.
>>>
>>>Steve W.
>>>tranny. What kind of cam, intake & head mods would you recommend?
>>>
>
>> Assuming you have the stock
>>2.88 rear end, if you want the same effective mph/1000 rpm in overdrive
>>then 2.88/.68= 4.235. If you changed to a 4.235 gear. You would be
>> crusing 70 mph in overdrive at around 3100 rpm ( depending on your
>> tire size.). You would have the capability for a lot of acceleration
>>in first to fourth . If you don't change your rear end then you would be
>>crusing along at 2100-2200 at 70 mph.
>
>>Jim Barrett Tiger II 351C and others
>
>Jim,
>I think something got inverted in our calculation. The effective ratio (for
>5th gear) would be 2.88*.65=1.96 which would mean at 3000 rpm, it should be
>running in the neighborhood of 117 mph (assuming normal tire size). I'm sure
>this what you meant.
>
>Cullen Bennett
No, I said that to keep the same effective ratio as the original Tiger
then you would have to put a 4.235 rear end gear to make up for the .68
overdrive
transmission.
My Tiger with 2.88 rear and 235-50-13 tires MPH= RPM(.0221124).
Assuming the same tires and rear end, a .68 overdrive at 3000 RPM would
provide: 3000 (.0221124)/(.68) = 97.56 MPH.
Jim Barrett Tiger II 351C and others.
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