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Old 12-22-2001, 08:36 PM   #1
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Default greem machine 3 dyno results (good info)

i got my gm3 dynoed today on a turbo dyno here are the numbers:
constant 20 amps
run 1:
rpm:20640 Torque:9.3 Watt:142 Eff:104 volt:6.74

Run 2:
rpm:20916 Torque:10.3 Watt:159 Eff:118 Volt: 6.74

Run 3:
rpm:20831 torque:9.7 Watt:150 Eff:111 Volt:6.74

Run 4:
rpm:20901 torque:9.7 Watt:150 Eff:111 Volt:6.74

this motor has 2 full race days and 2 practice days on the com, i shouldve cut it but the guy at my lhs said it was fine. i used the stock springs and reedy 767 brushes(i also needed new brushes.)

just for comparasion here is a fantom mvp that needed its com cut.

Run 1
rpm:20681 torque:8.5 Watt:131 EFF:94 Volt:6.74

Run 2:
rpm:20954 torque:8.1 watt:126 Eff:93 Volt:6.74

Run 3:
Rpm: 20628 torque8.4 watt:126 Eff:90 Volt:6.74

post your dyno results for comparasion.
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Old 12-23-2001, 10:28 AM   #2
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My p2K: Max power- 131 watt
20-30 amp range- 112 watt
Torque at max power- 102Nmm
Torque total- 182Nmm

That is a robotronic, so you can't compare it to your CE results.
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Old 12-23-2001, 11:22 AM   #3
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but are these numbers good for a gm3?
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Old 12-23-2001, 01:15 PM   #4
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TypeS.....hate to burst the bubble here.....but there is no way in hell that you can get 150 watts out of a stock motor.....ANY stock motor for that matter. Better check your dyno and your arm.

Was the MVP tested on the same dyno?

And the efficiency over 100%? something is definitely wrong with your dyno.
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Old 12-23-2001, 02:20 PM   #5
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Aloco, remember it is a CE dyno.
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Old 12-23-2001, 08:19 PM   #6
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just got my green3 dyno'd yesterday before the main. I'm not familiar with CE numbers so is this any good.

constant volt 7.00

rpm: 22265, torq: 5.5, watt: 91, ef: 72, amps 17.8
rpm: 21467, torq: 6.4, watt: 102, ef: 72, amps 20.0
rpm: 20873, torq: 7.0, watt: 109, ef: 70, amps, 22.0
rpm: 20214, torq: 7.7, watt: 115, ef: 68, amps, 23.9
rpm: 19704, torq: 8.3, watt: 121, ef: 66, amps, 25.9
rpm: 19256, torq: 8.8, watt: 126, ef: 64, amps, 27.9
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Old 12-23-2001, 08:22 PM   #7
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Kailboy-yes that is pretty good. Look at the 20 amp numbers. Anything over 100 is great...You could ask Big Jim for more info, i don't know much about the CE dyno.
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Old 12-23-2001, 08:24 PM   #8
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is big jim on this board? if so ill im him
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Old 12-23-2001, 08:35 PM   #9
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Type s.... I use a CE dyno and those numbers are way out of line with any motor i have dyno'd . I have never seen eff that high.. High 60's is normal and 100 watts at 20amps is good but I never seen anything close to 150! Something is wrong here.
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Old 12-23-2001, 08:38 PM   #10
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ill check the print outs again, but im pretty sure they are correct.
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Old 12-23-2001, 08:41 PM   #11
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im sure i just checked them twice. when i go to my lhs ill have him dyno it again.
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Old 12-23-2001, 08:45 PM   #12
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CE dyno's take readings at six steps, either at amp steps or at torque steps, depending how you set it up. You could program it to just test at 20 amps if you want but I never heard of anyone doing this. In fact Big Jim uses a CE dyno (acording to his book) and he says 100-110 watts at 20 amps is about all you can expect and that was at 7.0 volts
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Old 12-23-2001, 09:16 PM   #13
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Thanks guys. I was gonna ask Jim about it, but I'm having some troubles logging in.
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