ziemer
Active Member
- Joined
- Mar 17, 2005
- Messages
- 902
- Points
- 18
Different props make a difference also. The Hoss style props seem to run with more for some reason. For example, my 28 Hyperdrive was 101.7 mph at around 8100-8150 which puts the slip at just under 12%. Now my 22 Yamaha drag, in a 1/4 will turn in the neighborhood of 9400 with a speed of around 96 mph. That equates to somewhere between 8 & 9 %. My old chopper I had, which had a bunch of cup would normally run around 7-8%. So again, it all depends on the prop and the work that's been done to it.JR said:For some reason, the slip factor on the large Grandsport hull is higher than most Allisons except the '03 fissin' boat. I think Jeff Zs engine would probably push a ss2000 5-6 MPH faster than his Grandsport.
JR's numbers equate to somewhere between 12-13% which isn't bad considering all the stuff he has in the boat and a dinged up prop. :grin: :grin: