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Discussion Starter #1
below is a mpg and mph compair. 19" rebel vs 19" viper
what are you running and what do you think about it.

19" Rebel - 3 blade


RPM MPH GPH MPG
500 2.2 0.36 6.0
1000 5.7 1.46 3.9
1500 7.9 2.97 2.6
2000 9.0 5.98 1.5
2500 14.7 12.22 1.2
3000 21.4 14.20 1.5
3500 29.0 17.19 1.7
4000 35.3 20.70 1.7
4500 41.0 24.45 1.7
5000 46.2 31.59 1.5
5400 48.7 37.84 1.3



Viper 19" 3 blade RPM MPH GPH MPG
500 2.3 0.36 6.3
1000 5.4 1.49 3.6
1500 7.4 3.08 2.4
2000 8.8 7.41 1.2
2500 9.8 12.30 0.8
3000 16.5 14.63 1.1
3500 22.8 17.58 1.3
4000 31.2 23.03 1.4
4500 37.3 26.94 1.4
5000 42.9 35.52 1.2
5500 47.8 41.44 1.2
5700 48.9 44.80 1.1
 

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Discussion Starter #2
I am running a 3 blade 21" pitch with 0 cup. it is ok at top speed but sux out of the hole. not really worried about hole shot near as much as fuel.
 

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Ankle Deep Custom Rods
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3,468 Posts
I am looking at replacing my prop, my 3 blade is great but but holeshot sucks, my 4 blade is break your neck holeshot but no topend and a gas hog. gotta be a in between out there someplace. My 4 blade is cupped, might have the cup removed and see what it does.
 
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