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Old 02-28-2006, 11:35 AM   #91
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Originally Posted by Marcos.J
wow those are real good #'s are all thoses at 7.00 volts?
Yep. With a fresh slave motor and the baseline motor numbers in good order as well. The numbers I posted are also the second run of each motor. The initial runs had slightly higher numbers. But I always choose to go with the second more conservative run which also helps to make sure that the brushes are broken in.
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Old 02-28-2006, 11:37 AM   #92
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Originally Posted by teamgp
Yep. With a fresh slave motor and the baseline motor numbers in good order as well.
awesome , Im working on a few CO27 and they are looking really good!! but I still like my P2K and the Monster a little better
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Old 02-28-2006, 02:49 PM   #93
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Sorry the question, but how does one read this numbers? What should a newbie like me be looking for?
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Old 02-28-2006, 02:53 PM   #94
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The most important number is Watts. 746 Watts = 1 electric horsepower.
Watts is determined by the combination of torque and RPM. HP (Watts) = RPM x Torque. So essentially, you can just look at watts only.

Many people value RPM and Torque differently. And that would be inaccurate. Truth is: speed is a matter of gearing.

Efficiency really isn't as much of a concern because today's batteries have plenty of mAH to spare. Although I've heard that high efficiency can cause the motor to run cooler. Can anyone confirm this?

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Old 02-28-2006, 02:54 PM   #95
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Quote:
Originally Posted by teamgp
Yep. With a fresh slave motor and the baseline motor numbers in good order as well. The numbers I posted are also the second run of each motor. The initial runs had slightly higher numbers. But I always choose to go with the second more conservative run which also helps to make sure that the brushes are broken.
Hey Guy thanks for taking the time to post those results. Seems you are finding the same thing I have when comparing brushes and comparing the C027 to other motors.

EA
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Old 02-28-2006, 02:54 PM   #96
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Quote:
Originally Posted by bvoltz
Sorry the question, but how does one read this numbers? What should a newbie like me be looking for?
for stock you want to look for is watts!!=power
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Old 02-28-2006, 02:58 PM   #97
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Quote:
Originally Posted by Marcos.J
for stock you want to look for is watts!!=power
Yes to an extent. RPM is also very important as well. That is where you figure your gearing out when comparing one like motor to another like motor (C027 to C027 etc).

I use wattage first, then RPM, then Torque. If I have 2 motors with the same wattage I'll go to the next factor of RPM and so on. But once you find a motor that dyno's good AND runs good with a given gear you can then dyno another motor with different rpm and get the gear pretty close by looking at the rpm of the first motor.

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Old 02-28-2006, 03:07 PM   #98
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Quote:
Originally Posted by EAMotorsports
Hey Guy thanks for taking the time to post those results. Seems you are finding the same thing I have when comparing brushes and comparing the C027 to other motors.

EA
I guess you could say I learned a lot by holing up in my room all day Wednesday at the Birds to work on the handout motors and finally figure out my CE dyno. Still learning more though.

bvoltz,

For power comparisons of stock motors pay more attention to the watt readings at 20A (top end down the straights) and 28A (low end out of the corners). Anyone correct me if I'm wrong, but I believe good numbers are somewhere around [email protected] and [email protected], with up to a +/-3W variance between dyno's.
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Old 02-28-2006, 03:11 PM   #99
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Quote:
Originally Posted by teamgp
I guess you could say I learned a lot by holing up in my room all day Wednesday at the Birds to work on the handout motors and finally figure out my CE dyno. Still learning more though.

bvoltz,

For power comparisons of stock motors pay more attention to the watt readings at 20A (top end down the straights) and 28A (low end out of the corners). Anyone correct me if I'm wrong, but I believe good numbers are somewhere around [email protected] and [email protected], with up to a +/-3W variance between dyno's.
I think that it was according to "Big Jim" was at least 100 watts at 20 amps and at least 120 watts at 28amps
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Old 02-28-2006, 03:11 PM   #100
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told u guys this motor is the real deal
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Old 02-28-2006, 03:14 PM   #101
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Quote:
Originally Posted by Marcos.J
I think that it was according to "Big Jim" was at least 100 watts at 20 amps and at least 120 watts at 28amps
And to add to those thoughts further... Big Jim's best stock motor he ever had (P2K2) produced 139 watts @ 28amps.
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Old 02-28-2006, 03:27 PM   #102
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Quote:
Originally Posted by James35
And to add to those thoughts further... Big Jim's best stock motor he ever had (P2K2) produced 139 watts @ 28amps.
from Bid Jim's website
Quote:
Originally Posted by Big Jim
My Best P2K2 @ 7.0V:
20366rpm 6.8TQ 103W 74EF @20A
17270rpm 10.1TQ 129W 66EF @28A
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Old 02-28-2006, 03:29 PM   #103
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Quote:
Originally Posted by teamgp
I guess you could say I learned a lot by holing up in my room all day Wednesday at the Birds to work on the handout motors and finally figure out my CE dyno. Still learning more though.

bvoltz,

For power comparisons of stock motors pay more attention to the watt readings at 20A (top end down the straights) and 28A (low end out of the corners). Anyone correct me if I'm wrong, but I believe good numbers are somewhere around [email protected] and [email protected], with up to a +/-3W variance between dyno's.

Yeap sometimes the best way to learn is to just sit down and do it!! I tend to remember stuff more if I actually do it than I do if someone tells me about it!! LOL

But one thing I have found is that with todays current crop of cells and the current motors we have that you are better off using the 22-25 amp load for the straight away (and to be honost I dont pay much attention to the wattage here) and use the 30 amp number for the corners. If you actually use a data tree recording device (or the new spectrum system) you will see that stock motors acutally pull more than 30 out of the corners on some tracks.

he varriance comes from how good the car is, how smooth the line is and how high the traction is on the track. If you just touch a flapper the amp draw can spike up to 70-90 amps on a stock and over 100 amps on a 19 turn. Its actually pretty impressive if you install one of those and look at the data.

EA
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Old 02-28-2006, 03:51 PM   #104
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Hmm, I could have swore he said 139W at 28amps. I can't find that post now. However, I did find this post from Big Jim that says it was 131W:
Quote:
And Harry, how many times have you heard me say this. Horsepower is horsepower! Speed then is just a matter of gearing. HP (Watts) = RPM x Torque. If the RPM-ish Monster produced 131W @ 28A on my dyno the way that P2K2 did then it would be "King" but it didn't so it's not.
Nonetheless, the new Monster CO27 is quiet impressive.
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Old 02-28-2006, 04:23 PM   #105
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Quote:
Originally Posted by James35
Hmm, I could have swore he said 139W at 28amps. I can't find that post now. However, I did find this post from Big Jim that says it was 131W:


Nonetheless, the new Monster CO27 is quiet impressive.
i seen that one but for P2K it was 129
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