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View Full Version : BGF 8 second class Gears??


wfoflat
12-03-2007, 10:15 PM
What gears are you guys running and with what prop at what RPM.
Im just trying to see the different combos out there?
Jetboatguru
12-03-2007, 10:26 PM
What gears are you guys running and with what prop at what RPM.
Im just trying to see the different combos out there?
WFO, Find out what kind of Horsepower your motor makes and then you can make a gear call. Also, if you are running one of Joes props they are typically pretty grabby. If you are pushing 1000hp, you should be around a 22 to a 29. With the ProGas motors we had over 1240hp and ran 18's but that was naturally aspirated and weak on the bottom end. If your motor is making 800-1000 hp I would put a 15-18 gear in it.
flattie440
12-03-2007, 10:58 PM
what he said....
g935
12-04-2007, 07:03 AM
Since you have a scheduled showdown looming on New Years, I would set the boat up for 1/8 mile. I doubt that you will get a chance to run a ¼ mile. Get a jump on your competition and get out front. Then do the river race thing. Let off after you pull a few lengths and collect. So, with that being said, I would go with big prop and small gears. Oh, I just happen to have a 1 inch 11 ¼ x16 Menkins comp flat prop for sale. Virtually brand new. :)
Best of luck
Geoff
wfoflat
12-04-2007, 12:17 PM
Thanks guys, I have a few friends just completing there builds and they have a dyno proven 1k hp. They are flats and want to know what would be a good gear to start with? RPM would be in the 7500 to 8000 range.
Boat211
12-04-2007, 01:29 PM
WFO, Find out what kind of Horsepower your motor makes and then you can make a gear call. Also, if you are running one of Joes props they are typically pretty grabby. If you are pushing 1000hp, you should be around a 22 to a 29. With the ProGas motors we had over 1240hp and ran 18's but that was naturally aspirated and weak on the bottom end. If your motor is making 800-1000 hp I would put a 15-18 gear in it.
I see how I rate Tony.
stix818
12-04-2007, 02:42 PM
Go with Tony on that!!! We haven't proven anything yet but that's what the old man is running (8000RPM with 29s)!!
By the way he finally made it down the course Tony!!! Yeah ha!!!!!!!