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Old 06-11-2003, 07:31 PM   #946
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even brushes and springs?
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Old 06-11-2003, 08:00 PM   #947
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No, brushes & springs are the exception to that rule. You can run ANY brushes & springs you want, I believe, you just have to be aware that some will be a lot harder on the comm than others...
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Old 06-11-2003, 09:54 PM   #948
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I don't mean to come off as a know it all ( which I am not), but I find that if I use 767's or 4499's or putnam etc,etc.... NO single brush makes a big of a difference in the overall power as properly aligned brush hood. I have both a p2k2 and MHS, and they both rip. When compared, for example, 4499's & putnam blu/grn combo, you are only looking at a 2-3 watt advantage on average. I think it becomes a case of splitting hairs. An extra 3 watts is a good thing,but so few of us are able to run a flawless qualifier where this 3 watt advantage is not wasted. Now this approximation is from a post by Big Jim greenemeyer, so I don't doubt it. As I stated before, both my stockers are quite fast. each has NO blackening at all. I put 98% of my tuning efforts to attain this and feel it is probably one of the most overlooked (and most important) steps. A little food for thought for my fellow racers. --Al
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Old 06-12-2003, 09:12 AM   #949
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Default Power advantages

big al;

I WISH that I could find a 3 watt advantage. ONE watt makes a noticeable difference in the Car.
For Brushes, the Putnam blue/green have given the best performance in my MHS.
I haven't bee able to find another motor that runs as good yet in my Car, yet.
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Old 06-12-2003, 05:21 PM   #950
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Default Re: Power advantages

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Originally posted by popsracer

I haven't been able to find a motor that runs in my Car, yet.!!!!
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Old 06-12-2003, 05:45 PM   #951
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That's strange pops, I went back to 4499's (had putnams before) and noticed a significant top and bottom end improvement. I actually went up to a 7.0 (from a 7.2) ratio. Honestly,if someone was handing out stock motors with a 3 watt improvement over mine....hell yeah, I'd take one, my point is that I feel proper hood alignment will give an overall higher improvement than just a brush change would. Assuming you already have "race" quality brushes. Either way Pops, one of these days I gotta make the trip down south and get myself a good ol' fashioned a$$ kicking. I've gone to the SoCal web page and that place just looks cool.

--Al
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Old 06-13-2003, 09:37 AM   #952
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Quote:
Originally posted by defMondo
There is more to motors then RPM, the most important things are power and torque.

How do the motors compare on the dyno in terms of power and torque.

I have a couple of motors with sticker numbers which are relatively low by comparison to others but the motors still run very nicely if you gear it properly.

Also depends a lot on your track, it it's tight and twisty you want something with lots of power and RPm's aren't very important.

Tony
tanx 4 d input, irecently ran on a tight carpet track and had the chance to test what i perceived was my strongest and weakest stock motors, namely the mvp reedy and banzai p2k2.

i timed my runs and my runs on both motors were nearly identical, i was hoping for a bigger gap between the two motors but was surprised that the mvp was quicker by only a couple of tenths.

i havent had the chance to change the gear ratio, i used 120/37 spur pinion combi, 4 my 414M thats roughly a 6.9 final ratio. i used the same pinion spur combi for both motors.

i'm racing tom in the same track and will try to mix and match gear ratios to find the best set-up.

i guess u were right, tanx 4 d info.
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Old 06-13-2003, 09:44 AM   #953
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Quote:
Originally posted by schumacher
by definition power = torque x rpm

(its actually power = torque x angular speed but i have simplified it)

so the number to look for is power. If you have a motor which has lots of torque then it needs gearing longer and a high revving motor requires shorter gearing.

sanj
i'll take that into account when i race tom. i tested both the banzai p2k2 and the mvp yesterday and timed my runs, both run times were within tenths from each other. gearing was 120/37. that comes out to roughly 6.9 final drive ratio. tomorow during qualfying i'll try to experiment with gearing too see what gearing is optimal for both motors. i guess the clock does not lie, was about to sell the banzai, now i think i'll keep it and use it. tanx
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Old 06-13-2003, 09:59 AM   #954
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Quote:
Originally posted by syntex1
evaa what DYNO did u measure it on?
dose it only give rpm readouts?
another point to factor in the older the motor is the more rpm it produces this is due to weaker magnets or smaller comm
i forgot what the dyno was, but it gave rpm, condition and amp read-outs.

i believe the p2k armature (the older motor) is near its last few cuts, maybe thats why it churned out more rpms.

btw, i tested the banzai p2k2 and the mvp ydayand was surprised to find out that my lap times were nearly identical, the mvp was up by only a few tenths on the banzai. i'll race tom and will try experimenting with other set-ups in terms of gearing to find out which ratio works best with what motor.

tanx 4 d info
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Old 06-13-2003, 10:03 AM   #955
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Default Re: Motor Dyno numbers

Quote:
Originally posted by popsracer
Guys;

Generally, You want to pick Motors with the Highest Power #'s. Torque will usually follow the Power, up or down. Proper tuning can help, but there is only so much you can do to a Stock Motor
and keep within the rules.
As for finding that "Magic" Motor, it's all luck of the draw unless you have several dozen to Dyno and pick and choose the best. (now who might be able to do this?)

Just my .020
ur right! i agree 100%. tanx for sharing ur thoughts
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Old 06-13-2003, 10:09 AM   #956
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Quote:
Originally posted by spaz456
if the motor that didnt dyno so well seems to be producing better performance on the track then chances are it is producing its power more in the usable amp draw range for your type of racing, as opposed to the other motors you have dynoed which produced better numbers but there power may be in an amp draw range those motors may never see in the type of racing you are using them for. just something to keep in mind.
tanx, i did some testing yday and found out that the mvp was quicker by a few tenths only over the banzai p2k2.

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Old 06-13-2003, 11:23 AM   #957
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There's no need to quote everybody and give essentially the same reply - one full answer will do.
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Old 06-13-2003, 12:16 PM   #958
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EVAA-- Keep that p2k2 in the 6.6-6.7 range and you will see a difference!! Hope this helps--AL
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Old 06-13-2003, 08:02 PM   #959
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Quote:
Originally posted by sosidge
There's no need to quote everybody and give essentially the same reply - one full answer will do.
oooops! sorry for that.
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Old 06-13-2003, 08:04 PM   #960
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Quote:
Originally posted by big al
EVAA-- Keep that p2k2 in the 6.6-6.7 range and you will see a difference!! Hope this helps--AL
i'll try that, will give results l8r.
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