Vision 20 + OS motor set-up tips

[Tim_Duggan]

Anyone able to give me a few pointers on trim angle, prop height, CG with a stock OS motor (except head shim removed)?

Thanks in advance,

Tim.

 

[Beau Parsons]

Tim,

What prop and nitro percentage are you using? this might help us help you.

Beau

 

[Tim leyde]

COG 8" from transom

OS motor 40/53 sharpened/ balanced

Bottom of bullet even with bottom of sponson

.30- .70 degrees + on the cav. Plate.

TL

 

[Tim_Duggan]

Beau,

Lynx cut X442, 60% nitro.

 

[BradSpencer]

Yep, Louise's boat is cranking. Kris might be able tell you how she has set it up.

 

[Tim_Duggan]

Spent all day trying to find a fast set-up with mod today and just can't get it to go the next level, figured I might put the OS on it next time out for a try.

 

[Beau Parsons]

Beau,

Lynx cut X442, 60% nitro.

That is a lot of prop for a stock motor, but here we are 6000 ft above sea level. I would try a 40X53 like Tim said mine like this prop alot. I have had good luck with a 440 also.

 

[Tim_Duggan]

I am at sea level here and that's the prop my OS loves on my Villain, more so than the 40x53/2.

 

[Kris Flynn]

Not telling my setup.

Vision will be heavier than your Villain mate, pretty sure anyway! so to me the 442 could be too much, but won't know till u give it a go, a!

Shaun told me 7.75" cog, 1/8" to bottom of bullet above sponson bottoms and no negative.

Pretty much what I'm running now with an Ozspec 40x53. Need a little less prop or more back cut to unload in the corners more though...

 

[Tim_Duggan]

Now I need to figure out who I loaned my 40x53/2's to....

 

[Tim_Duggan]

Shaun told me 7.75" cog, 1/8" to bottom of bullet above sponson bottoms and no negative.

Pretty much what I'm running now with an Ozspec 40x53. Need a little less prop or more back cut to unload in the corners more though...

That's pretty much where I had it today with the GO. Handled nice, just couldn't get any speed from it.

 

[Kris Flynn]

Have you tried other pipes?

 

[Tim_Duggan]

Yep. Irwin, SPP and gadjet. Tried different lengths too.Tried 3 carbs, and 3 motors and several props. The only thing I haven't tried is a different leg, fuel tank and needle valve.

 

[Tim leyde]

Tim, mine also liked the M440 with Mark S lynx cut to it. I'm running a motor done by Monger. With this combo I have had it two stage a few times. It's impressive. Don't be afraid to run the bottom of the bullet even or a hair below the bottom of the sponsons. Mic H. gave me that tip and it was great!

 

[Tim_Duggan]

Thanks Tim,

I tried a Sholund Lynx cut M440 a few times today and did find I had to lower the motor to get better drive from it. I just can't get it to run higher than 48mph no matter what I try. My heavy old HTB290 runs 55mph all day long so it's frustrating me.

 

[Ronald van Essen]

Anyone able to give me a few pointers on trim angle, prop height, CG with a stock OS motor (except head shim removed)?

Thanks in advance,

Tim.

Tim,

did you go through this thread, its the same subject.

http://www.intlwaters.com/index.php?showtopic=58063

 

[Kris Flynn]

Tim, just to clarify, you are not flipping or crashing or anything....you just can't get enough speed from your mod motors?

If that's the case, maybe the Pony maker can help you out (Nova boy).

They are not inefficient boats (ie high drag) so not sure what else could be the issue.

You have done the reduced bowl volume thing on the nova?

 

[Kris Flynn]

Or maybe it's a dud cause it wasn't bought through me and doesn't have my secret touch, just look at Gino's

Don't think the lower unit is an issue, could the tanks be partially blocked or something, even the needle?

Wish Shawn would pay me for this stuff...

 

[Tim_Duggan]

Tim, just to clarify, you are not flipping or crashing or anything....you just can't get enough speed from your mod motors?

If that's the case, maybe the Pony maker can help you out (Nova boy).

They are not inefficient boats (ie high drag) so not sure what else could be the issue.

You have done the reduced bowl volume thing on the nova?

Not flipping, dunking etc.Reduced bowl volume, higher comp head etc tried. I don't think it's motor, had 3 on it all do the same.

 

[Tim leyde]

Anyone able to give me a few pointers on trim angle, prop height, CG with a stock OS motor (except head shim removed)?

Thanks in advance,

Tim.

Tim,
did you go through this thread, its the same subject.

http://www.intlwaters.com/index.php?showtopic=58063

Look at Larry Conrads setup. I've seen this boat run its sweet, fast and very stable in rough water (mod motor)!