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Post by sailracer on Jul 8, 2013 18:49:32 GMT -5
This question is for those members who have done gearset changes. What is the actual mph gain that can be expected when going from stock 15/51 gears to a 16/50 set?  |
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Post by millsc on Jul 9, 2013 8:09:26 GMT -5
You gain about 5 mph with 16/50 set and around 8-12 with the 18/46 hoca set
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Post by sailracer on Jul 9, 2013 8:20:01 GMT -5
Thanks, That's what I wanted to know  |
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Post by prodigit on Jul 9, 2013 8:38:06 GMT -5
I suppose you need to know what engine you're running?
In theory, the formula is pretty simple:
multiply your top speed by 51 and 16, and divide by 50 and 15, as the top speed is pretty linear with gear tooth increases.
A speed of 40MPH should become 43.5 MPH
A speed of 60MPH should become 65 MPH
in practice it depends on all kinds of factors, like cc's, engine type, wind/hills, etc...
And the formula is much more complex. But the above fmla should do just fine for approximation.
Like, if you would go with the 18/46, 40MPH becomes 52MPH, and 60MPH becomes 78MPH.
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Post by jerseyboy on Jul 9, 2013 9:13:14 GMT -5
[replyingto=prodigit]prodigit[/replyingto]But 60 wont become 78 unless you up the displacement.
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Post by sailracer on Jul 9, 2013 10:27:16 GMT -5
How the heck are you mathematically doing this when the gearset is the intermediate? Would,nt you need to take into consideration the entire ratio,and circumference of the rear wheel, with tire to compute this?
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Post by sailracer on Jul 9, 2013 10:30:12 GMT -5
I just wanted a figure from the guys who did it. Millsc answered it thanks anyway  |
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