Pure Energy

Not sure it's true but thats what my gps says!!

I just finished grinding the chit out of the nose cone and put on a new prop. I maxed out @ 5500 rpms, but the Whipple was screaming like I never heard before.... we were definately mov'in. Gps read 86 but when we got back to the dock the max speed said 102.5!! I'll take a pic tomorrow.

z.zuperboat

Do the math. 5500 ,1.5 ratio, pitch you know your slip . Whats the number. Even close would be good. You would have to be swinging a 33 pitch at 5500 with a 1.5 gear and a slip of 10% to go 102.

Pure Energy

Math, formulas, calculations, physics, etc. etc. etc., don't work in my brain!!

Give me a throttle, a good motor, cold air, room to run and I'll show you some numbers!!!!

Superbabi

K, 102.5 !!!!! thats flying, how did the Y2K feel at that speed ??? what type of water conditions, flat or chop ???

Pure Energy

Gary, I can neither confirm nor deny the number on the GPS. The water was flat calm, air and water temps in the high 60s, me and a buddy, 1/2 tank of fuel, 1 12 pack 3/4 full.

How did she handle????? Same as always!!! Flawless!

z.zuperboat

PE whats the pitch on the prop ?

Pure Energy

30p Hydro, lefty. Prop had been labbed by TU, but not for my boat. Cupping added, reduced diameter to 15", blades thinned , no diffuser ring and some other stuff. I called Julie about it and she said the goal was to reduce stern lift on a 29 Fountain.

For me it took less trim to optimize speed @ various rpm, and made the boat feel less "stuck" to the water. It was a little loose if over trimmed. I could also wiggle the boat with the steering wheel. @4000 rpm I was going 63 mph if you can get any info from those numbers

mikebrls

so youu would have had to pick up 39 mph with 1500rpms ?
sound's like a lot of speed for such litle rpm .
what hp motor ?

UNSANE

So I guess that prop I sold you worked out!

Was curious about how that wheel worked out for you. Congratz!

Pure Energy

I don't get into boost til 4500 rpm