Keith Atlanta

What is the difference in the Bravo 3 upper?

For example, can I buy a Bravo 3 take the dual prop lower off and put my standard Bravo lower on it?

Mr Gadgets

You have to check the charts for gear ratio's. But the uppers will swap.
The Bravo 1 X has a steel tower in it.. where as the Bravo 3 upper would not. Unless it is an X also..

Hope that helps.
Dick

Keith Atlanta

Its a Bravo 3 X with a 1.81 ratio.

I thought the gear ratio was done in the lower?

Mr Gadgets

I am not sure what combinations make up the ratio for the B3. But in a B1 it can be upper and/or lower.
Bam's site has a chart for each series of Bravo drives. You can find the answer there. If it gets too confusing.. let me, I can look at it when I get home from work, if I have some time.

Dick

t500hps

I checked these many years ago and found these:
A B3 upper in 2.20 is the same as a B1 in 1.65
B3 2.00 is a B1 1.50
so a B3 1.81 is likely a B1 1.36.......hope you running lots of HP to spin that gear ratio.

Mr Gadgets

Your right T500, I just checked the chart..

B3, 1.81 = 29/27 upper
B1, 1.36 = 29/27 upper. Run with the 15/19 lower gears. So now you need a smaller prop, to run that combination..

Hope that helps.
Dick