To me, you have a standard gearbox out of a sprite or something similar, i just cant believe someone can build a straight cut box and then fit the wrong diff.
1275 Power: What Do I Have? What Do I Need?
Started by
gottamini
, Sep 19 2012 12:32 AM
18 replies to this topic
#17
gottamini
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Learner Driver
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Posted 21 September 2012 - 07:17 PM
To me, you have a standard gearbox out of a sprite or something similar, i just cant believe someone can build a straight cut box and then fit the wrong diff.
As I said, I dont know for sure that it is a straight cut box. was just assuming due to the deafening whine. need to know how to tell for sure without opening it up.
Jon
#18
carbon
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Up Into Fourth
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Posted 21 September 2012 - 07:37 PM
You may be able to tell if you have a SCCR gearbox by the drop in rpm between gears. Ratios in the SCCR are about 2.5, 1.75, 1.25, and 1 :1 respectively. If you change from third at 5000rpm into top the rpm should drop to about 4000rpm with the SCCR box, if the speed is held constant.
#19
gottamini
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Posted 21 September 2012 - 07:43 PM
You may be able to tell if you have a SCCR gearbox by the drop in rpm between gears. Ratios in the SCCR are about 2.5, 1.75, 1.25, and 1 :1 respectively. If you change from third at 5000rpm into top the rpm should drop to about 4000rpm with the SCCR box, if the speed is held constant.
Thats what I was looking for, Thank you. what would the rpm drop be if it is a standard box? When I get a chance to try that I will post the results.
Jon
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