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Old 02-09-2005, 11:56 AM   #1
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Default Mod Motor Tuning/ Maintenance??????

What are some general tips for breaking in, tuning and running a mod motor in a sedan for a club race?
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Old 02-09-2005, 01:43 PM   #2
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Depends on the the make and wind of the motor and the type of track and track conditions that you will be running under. We need more specifics to help you out.
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Old 02-09-2005, 03:55 PM   #3
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if its a low turn mod motor like a 11t then you will probley want to buy a lathe or get to know someone who has one!
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Old 02-09-2005, 06:15 PM   #4
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what about an Orion Revolution 10x2? Ive heard the comm and brushes last a lot longer before needing service than other motors.
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Old 02-09-2005, 07:21 PM   #5
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i have been reading alot lately about people who want the speed of these hot modified motors but thier looking for long lasting brushes and doing everything they can to prolong the life of the comm before it needs to be cut, yes you could get that motor and get long lasting brushes and pull 10-15 runs out of it before a cut, but i wouldent do it i would never spend the money on a mod motor that i wasent going to cut or just skim at LEAST every 3 runs, you can cut it less often but you will notice a drop in speed about 5 runs in, i gaurentie that
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Old 02-09-2005, 10:15 PM   #6
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That's a bit extreme isn't it? I thought you could change brushes 3 or 4 times before you had to cut the comm.
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Old 02-09-2005, 10:34 PM   #7
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Normally it's the other way around. You NEVER put new brushes on a worn out comm. The brushes will NEVER seat properly. Your better off not using the new brushes. Now cutting the com and reusing the brushes 3-4 times is perfectly fine. I do it all the time with great results. Hope that helps a bit.

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Old 02-10-2005, 02:36 PM   #8
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its a team1 9x1 based on a D6, ran on indoor carpet track with foam tires.
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Old 02-10-2005, 02:46 PM   #9
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Cut the comm every 3 runs or so, replace brushes when they get too short, break them in at 2v with very low timing, 2 to 5 deg, 0 will cause excessive arcing. Brush life will be pretty short on carpet with foams, you might want to look into some of the new longwearing brushes. Not sure about D6 for an initial timing setting. I would start around 8-12 deg and go from there.

And as sushi boy said, never put new brushes on an old comm, this will cause a ton of brush bounce and will distort the comm even more.
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Old 02-10-2005, 02:57 PM   #10
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cool thank you!
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Old 02-10-2005, 08:30 PM   #11
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how much timing is each notch on the end bell have and which way advances timing?
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Old 02-10-2005, 10:50 PM   #12
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I believe each notch is 12 deg and when looking at the 0deg mark on the can with the shaft down, advance the endbell to the right.
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Old 02-10-2005, 11:19 PM   #13
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Any mod motor, I pull out and inspect after every run. The only low turn mod motors I've ever run that didn't need a cut after every run are the V2 based motors. Sometimes you may be able to get a couple runs out of a set of brushes. I haven't run the Trinity based motors in a while and I'm not too sure how the P94 brushes wear, but any KR based motor I run gets cut and brushes every run. V2 based motors get cut every other run and brushes every 4th run. And no, you never put new brushes on a worn com.
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Old 02-10-2005, 11:29 PM   #14
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Trinity P94 style motors.

Narrow the face of the brush.
4383 "big serrate"
cut every run
replacing brushes after four runs

The new silver brush requires less maintenance. I am cutting after a couple of runs and am putting about 10 runs on a set of brushes......

This is for 8x1, 9x1, and 10x1. I have not ran anything over a 10 or less than an 8 at this point.... The new big serration 4383 brush is awesome, but if you can swing the extra $$ the silver perform the same with less comm wear and last longer......
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Old 02-10-2005, 11:33 PM   #15
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Rob, are the silver one's you're talking about the same compound as the CS brushes? I just got my hands on some CS standups I'm going to run in a Ti and see how they stack up to a Quasar, power wise.
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