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110 MPH Yamaha Powered Venom..

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 PostPosted: October 29th, 2013, 8:07 pm   
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Congrats James wow 110 already wow, how does it handle at 110? what prop?

Steve

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 PostPosted: October 29th, 2013, 8:08 pm   
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These motors are sensitive to fuel because of the head design..james motor has looser mid grade heads...110...not much else to worry about lol

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 PostPosted: October 29th, 2013, 8:26 pm   
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beavertonae-21 wrote:
Congrats James wow 110 already wow, how does it handle at 110? what prop?

Steve



handles pretty good.. 95 and 110 don't feel much different handling wise. with the wind it tends to fall on its side ... against the wind it runs faster and is easier to keep straight. i was using my big Cleaver that KP pitched up to a 35


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 PostPosted: October 29th, 2013, 8:29 pm   
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DoktorC wrote:
These motors are sensitive to fuel because of the head design..james motor has looser mid grade heads...110...not much else to worry about lol


What I'm sayin Doc is it's not always about heads and compression ratios. In today's technology with variable cams and ignition timing any thing's possible, but in the antiquated world of 2 strokes there's still some elbow room. You can get away with "loose" heads, low compression and big power with short timing and low octane. It all depends on how the motor is set up to run. The higher the octane, the more resistant the fuel is to burn. The lower the octane, the quicker it burns. SO... If it's set up for a quick burn, you can get away with lower compression, and still get decent power. More about port timing than compression psi.

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 PostPosted: October 29th, 2013, 8:38 pm   
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dubber wrote:
Those be some crazy fast numbers! You always seem to slip into the best setup ever out of box :)


i wouldn't say slip..

im going to dig at mitchie on this one....

A) my superboat would have already done 80

B) i spent thousands on the challenger. three motors, hull mods,core.... ect

C) We know the 3.0 sporty does 114 on kens boat so thats a no brainer.

D) my super boat would have already done 80

whoops i said that twice..... :shock:... lol


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 PostPosted: October 29th, 2013, 8:44 pm   
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OneCycle wrote:
dubber wrote:
Those be some crazy fast numbers! You always seem to slip into the best setup ever out of box :)


i wouldn't say slip..

im going to dig at mitchie on this one....

A) my superboat would have already done 80

B) i spent thousands on the challenger. three motors, hull mods,core.... ect

C) We know the 3.0 sporty does 114 on kens boat so thats a no brainer.

D) my super boat would have already done 80

whoops i said that twice..... :shock:... lol



The 15 minute JC setup explained.....

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 PostPosted: October 29th, 2013, 8:56 pm   
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Garriganp wrote:
Shit. My neck hurts. Sorry. Just turn your computer screen...


Peter - ya gotta figure out how to turn those pics. LOL

Or - just take them in wide format in the first place.

I think I need to see a chiropractor now

:lol: :lol: :lol:

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 PostPosted: October 29th, 2013, 9:03 pm   
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 PostPosted: October 29th, 2013, 9:06 pm   
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Less weight makes up for a lot

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 PostPosted: October 29th, 2013, 9:08 pm   
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idvette wrote:
DoktorC wrote:
These motors are sensitive to fuel because of the head design..james motor has looser mid grade heads...110...not much else to worry about lol


What I'm sayin Doc is it's not always about heads and compression ratios. In today's technology with variable cams and ignition timing any thing's possible, but in the antiquated world of 2 strokes there's still some elbow room. You can get away with "loose" heads, low compression and big power with short timing and low octane. It all depends on how the motor is set up to run. The higher the octane, the more resistant the fuel is to burn. The lower the octane, the quicker it burns. SO... If it's set up for a quick burn, you can get away with lower compression, and still get decent power. More about port timing than compression psi.


Ummm....ok...I understand all of that...however these motors have a head design that makes them sensitive to octane when you cut the heads lol. If you don't cut them much they will survive on mid...if you cut them more (like mine and Mitch) you need more octane to keep it from detonating. We don't have the ability to tune the fuel or timing...nor do we have variable valve timing :mrgreen: ....and other than the exhausts being raised slightly the port timing is otherwise stock. It does however have a flat squish band so as you cut the heads you dramatically raise the chances of trapped gasses at the edge if the cylinder...

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