First 80 mono

[Glenn Gates]

Putting together my first .80 mono. Hull is a new MicroBurst 45". Eng. is a Steve Wood preped CMB. Just checked the balance point @ 32% (dry)ahead of transom(with all hardware excepting the pushrods and exh. coupler). Tank is a Walt Barney 23.6 Oz. Pipe is a AB 67 Muffled @ 12". I have a X457/3 and a X460/3 to try. Currently running @ 4300' elevation.Like I said advice welcome.

Thanks,

Glenn Gates

 

[shadow]

Honestly Glenn I think the hull is too long for the motor you are using. If it doesn't work out well for you I would put in the evo2 if you still have it. Try using a 462, 465, or a 467.

Cliff

 

[Blackout]

I'm no expert, but if it's a heat racing boat, a 45" long .80 boat is probably good. I'm building a 44" Seaducer with a O.S. 91. Jerry recommended the 44" hull for stability in heat racing water. My O.S. will probably make less hp than your preped CMB .80.

 

[Glenn Gates]

Honestly Glenn I think the hull is too long for the motor you are using. If it doesn't work out well for you I would put in the evo2 if you still have it. Try using a 462, 465, or a 467.

Cliff

Thanks Cliff, Andy Brown recomended a 91 VAC. Already sold the evo2 to Shanes brother. Just trying to get by with what I have. This one I might be able to keep right side up :blink:

Glenn

 

[Glenn Gates]

I'm no expert, but if it's a heat racing boat, a 45" long .80 boat is probably good. I'm building a 44" Seaducer with a O.S. 91. Jerry recommended the 44" hull for stability in heat racing water. My O.S. will probably make less hp than your preped CMB .80.

Craig, Let me know how the 91 works out I still have a couple of the 91's. One thing I failed to mention is that the wind blows at Decker lake about half the time. Just wanted something bigger to play with when I have to put the smaller boats away.

 

[Blackout]

Seaducer's website recomends a x460/2 for a .60 and a x462/2 for a .80. Even though you are at a high elevation, the x457/3 seems like it would be too small.

Who makes the M90 and M91 props that Seaducer recomends for the .90/1.01 engines? ABC? How do they compare with the x series props? What are their pitches in inches? Thanks.

 

[Glenn Gates]

Seaducer's website recomends a x460/2 for a .60 and a x462/2 for a .80. Even though you are at a high elevation, the x457/3 seems like it would be too small.

Who makes the M90 and M91 props that Seaducer recomends for the .90/1.01 engines? ABC? How do they compare with the x series props? What are their pitches in inches? Thanks.

Craig, The M90 is 2.56 Dia X 4.096 Pitch, The M91 is 2.64 Dia X 3.696 Pitch. Both are 1/4" bore ABC props. The Octura X460 is 2.36 Dia X 3.302 Pitch and the X462 is 2.44 Dia X 3.417 Pitch-and 3/16 bore.

 

[Blackout]

Seaducer's website recomends a x460/2 for a .60 and a x462/2 for a .80. Even though you are at a high elevation, the x457/3 seems like it would be too small.

Who makes the M90 and M91 props that Seaducer recomends for the .90/1.01 engines? ABC? How do they compare with the x series props? What are their pitches in inches? Thanks.

Craig, The M90 is 2.64 Dia X 4.096 Pitch, The M91 is 2.64 Dia X 3.696 Pitch. Both are 1/4" bore ABC props. The Octura X460 is 2.36 Dia X 3.302 Pitch and the X462 is 2.44 Dia X 3.417 Pitch-and 3/16 bore.

Thanks for the info!

 

[Glenn Gates]

Seaducer's website recomends a x460/2 for a .60 and a x462/2 for a .80. Even though you are at a high elevation, the x457/3 seems like it would be too small.

Who makes the M90 and M91 props that Seaducer recomends for the .90/1.01 engines? ABC? How do they compare with the x series props? What are their pitches in inches? Thanks.

Craig, The M90 is 2.64 Dia X 4.096 Pitch, The M91 is 2.64 Dia X 3.696 Pitch. Both are 1/4" bore ABC props. The Octura X460 is 2.36 Dia X 3.302 Pitch and the X462 is 2.44 Dia X 3.417 Pitch-and 3/16 bore.

Thanks for the info!

Made a mistake on the M90- Dia is 2.56"

 

[Blackout]

I'm no expert, but if it's a heat racing boat, a 45" long .80 boat is probably good. I'm building a 44" Seaducer with a O.S. 91. Jerry recommended the 44" hull for stability in heat racing water. My O.S. will probably make less hp than your preped CMB .80.

Craig, Let me know how the 91 works out I still have a couple of the 91's. One thing I failed to mention is that the wind blows at Decker lake about half the time. Just wanted something bigger to play with when I have to put the smaller boats away.

Glenn, I broke the rod on my O.S. 91 yesterday. I had about 7 tanks through it, not sure what happened. The piston and sleeve need to be replaced too, since they got damaged. I did notice that there was slop in the rod at the crankshaft when the engine was brand new. You could hear it when turning the motor over slowly. I never did anything since I trusted O.S. tolerances. But, not sure if that caused it or not... My dilema is that the new O.S. rod will probably have the same bad tolerances and I don't want to break parts again.

Have you run your .80 yet? I might go with a CMB .80 if I decide not to fix the O.S.. The .80 is a tad cheaper than the .91's.

 

[David Ashcroft]

Glenn old thread but did you end up building up your 45 microburst.

Any pics.

David

 

[Glenn Gates]

Built it and sold it David- the hull went to AU and the Joe Warren modded 91 Vac found a happy home in a rigger in UT