Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   Fountain (https://www.offshoreonly.com/forums/fountain-37/)
-   -   In or out? (https://www.offshoreonly.com/forums/fountain/333161-out.html)

C.I.M. 12-17-2015 10:35 PM

My 2000 twin step with 500efis would run 93 with labbed 32 bravo's. Props turning in.

ALL_IN! 12-18-2015 07:37 AM

Mine turns in with 34 bravos. ...my biggest gripe is the 34's seem to be so fast around the docks (at idle speed). The boat moves quite a bit of distance / pretty quickly.

But don't worry about maneuvering around the docks - if you pay attention, you will learn what works and what doesn't.

ALL_IN! 12-18-2015 07:40 AM

Stock 500's? GPS?
That seems fast for a 500 boat.


Originally Posted by C.I.M. (Post 4386302)
My 2000 twin step with 500efis would run 93 with labbed 32 bravo's. Props turning in.


KWright 12-18-2015 10:16 AM


Originally Posted by easyrider1340 (Post 4386348)
Stock 500's? GPS?
That seems fast for a 500 boat.

Not if he had it dialed in. He could get that # with 32's and still have 12% prop slip.

Interceptor 12-18-2015 03:24 PM


Originally Posted by Drew555 (Post 4386186)
Usually depending on water conditions I'll be trimmed to about 2-21/2 on the drives at a cruise speed of 50mph at 3100 rpms. If I trim more then that it will porpoise . But if I lay into it a little more she like a little more trim. Again this post may be a tiny bit premature due to the fact I have no wot numbers. I did run it up to 78mp at 4700rpm for a brief moment.

I'd suggest trimming the drive out more once you've on plane and raising rpms. 2.5 is a drive in condition, 3 is neutral.

C.I.M. 12-19-2015 05:45 PM


Originally Posted by easyrider1340 (Post 4386348)
Stock 500's? GPS?
That seems fast for a 500 boat.

Yes, gps and radar at the loto shootout. I spent a ton of time on setup on that boat. Lots of fun though.

Drew555 12-19-2015 09:32 PM

So I just went down to the shop where I tinker all winter on my boats. The guy who owns the place only takes time off to go to proformance schools " just to tell them there doing it wrong". He work 7 days a week 365 days a year till midnight every night. he has 35+ years making shi t go faster. Certified in almost everything. Builds boats mold up. Nick named the guru. So I asked him a learned engineer what happens if you spin in or out. .... Final answer ( like I thought being a hydronic engineer myself) causes stern lift not bow. So the interesting point is that the hustler turns out causing bow. Perhaps this is how the lesser the wetted surface. I have not compared the distances of the steps to the stern. Being its a ventilated hull I think turning in could be the reason for spin-outs on some of the twin step boats. Not to mention that the lifting strakes on a fountain are rounded a bit for speed but not stability. The hustler has very sharp edges causing great stability . So if I'm wrong with the in or out science please show me the detailed proof because I'm still just listening to someone TELL me something. I want science until I can try it for myself

Crude Intentions 12-20-2015 02:20 AM

Without owning one I know the phrase is "spin in to win" everything I've read fountains run a few mph faster spinning in.

JaayTeee 12-20-2015 09:32 AM

[QUOTE=Drew555;4386762]So I just went down to the shop where I tinker all winter on my boats. The guy who owns the place only takes time off to go to proformance schools " just to tell them there doing it wrong". He work 7 days a week 365 days a year till midnight every night. he has 35+ years making shi t go faster. Certified in almost everything. Builds boats mold up. Nick named the guru. So I asked him a learned engineer what happens if you spin in or out. .... Final answer ( like I thought being a hydronic engineer myself) causes stern lift not bow. So the interesting point is that the hustler turns out causing bow. Perhaps this is how the lesser the wetted surface. I have not compared the distances of the steps to the stern. Being its a ventilated hull I think turning in could be the reason for spin

See Bret and Bob's answers

http://www.offshoreonly.com/forums/o...questions.html

http://www.offshoreonly.com/forums/p...s-outward.html

The easiest way to understand this is to look at what's going on with the prop blades in the area between the outside of the gear cases and the chines...the low pressure side of the blade is down, drawing the transom down when rotating in ( stern leverage,)...outside rotation, the low pressure side is up, creating stern lift

1989mach1 12-20-2015 10:57 AM

Thanks jaay they almost had me thinking I was wrong lol...


All times are GMT -5. The time now is 03:34 PM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.