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Old 05-31-2004, 05:54 AM   #1561
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Yeh you guys in nz have crappy finals rules as well. Hey you stock guys i run on concrete what is a good brush strength 9 or 11 oz. and do you reckon trinity 4499 brushes are good or are they crap??
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Old 05-31-2004, 07:24 AM   #1562
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I love the 4499's. That is basically all I use. Reedy 767's are awesome too.
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Old 06-01-2004, 09:58 PM   #1563
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Hi -

I was wondering if there is anyone who tunes stock motors in Canada - maybe the Ontario area...???

Not really wanting to send stuff across the border - if there is anyone who knows of this service, please let me know!



Thanks

Dave
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Old 06-02-2004, 04:14 AM   #1564
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Default 4499 good Brush

767 is what I use, but 4499 is next in line. Both make great power. I drill a 5/64 hole in them once the serrations wear off. This keeps the com and brushes clean with out getting arc,burn or glaze.
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Old 06-02-2004, 04:21 AM   #1565
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why dont you buy a serrater from eagle. ive seen one on speedtech. you can re serrate your brushes anytime you please. I dont know how small you would let them go for tho
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Old 06-02-2004, 04:45 AM   #1566
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Quote:
Originally posted by F1Junkie
Hi -

I was wondering if there is anyone who tunes stock motors in Canada - maybe the Ontario area...???

Not really wanting to send stuff across the border - if there is anyone who knows of this service, please let me know!



Thanks

Dave
Even though you want the service, you might this helpfull: http://www.motortuningsecrets.com/
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Old 06-02-2004, 05:13 AM   #1567
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Thanks Thomas -

Maybe I don't need it after all!

Cheers

Dave
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Old 06-02-2004, 09:02 AM   #1568
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Default 4505's

I do use any of the shaving or drilling tricks but everytime I use 767's I get noticably less RPM/top-end on the track but a tad bit more torque. Are you supposed to shave them (I use em strait out of the bag)

What break in methods do you guys use? I've heard 3 amps & 3 volts....I do 2 minutes of each.

The "E" brush (4499) is probably one of the better brushes there is. I use the 4505 (Cross Cut 99-Plus Brush) It seems to produce a bit more power noticably on the track & the same RPM as the 4499. It gets less life though
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Old 06-02-2004, 09:18 AM   #1569
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I remember when a bunch of the Losi guys came out to our track for a race. I remember Mike Truhe breaking in his motors, because you could hear it from a mile away. He hooked them up and cranked it as high as him Pulsar would go. That thing screamed like I've never heard before! Although, he made a 3 minute job into a 4 second job.....can't argue with that...
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Old 06-02-2004, 02:31 PM   #1570
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my brush hoods are lined up, break in takes less than 5 minutes at 3 volts. I run the motor slow (3v) with out a fan on it until the brushes are seated all the way out to all 4 corners. If its a rebuild including skim, it takes less than a minute to re seat them. I hit them with a brass wire tooth brush, then break them in. If the hoods have been whacked or something is out of line, I will see it right away by the wear pattern on them.
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Old 06-02-2004, 07:57 PM   #1571
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Default Re: 4505's

Quote:
Originally posted by The Black Kat
I do use any of the shaving or drilling tricks but everytime I use 767's I get noticably less RPM/top-end on the track but a tad bit more torque. Are you supposed to shave them (I use em strait out of the bag)

What break in methods do you guys use? I've heard 3 amps & 3 volts....I do 2 minutes of each.

The "E" brush (4499) is probably one of the better brushes there is. I use the 4505 (Cross Cut 99-Plus Brush) It seems to produce a bit more power noticably on the track & the same RPM as the 4499. It gets less life though
how can u do 3 amps AND 3volts each? those r two different measurements
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Old 06-03-2004, 01:22 PM   #1572
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I'm just sayin what I heard...

ATM I'm doing 3 volts for 2 min & then I turn it to 3 amps for 2min

Anyway...I had a question about brush tweaking...What would be a better way to increase RPM via brushes? Drilling a hole in the center or shaving away 1/2 the brush (to simulate increased timing) I'm doing this to a Core so it has plently of torque...I just want a few more revs (RPM)

Can I use sandpaper to shave brushes? Or should I use a file? If I drill a hole in the brushes how big/deep should it be? How much would you guys estimate the RPM increase doing one or the other? In other words...how do I do these "mods" and which one works better in a Core stock

Thanks - Dan
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Old 06-03-2004, 01:57 PM   #1573
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Lightbulb Laydown Brushes

Laydown brushes at full width make the most RPM. When you narrow them, it creates more torque, but less RPM.

This is per Big Jim.
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Old 06-03-2004, 05:33 PM   #1574
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Okay...how would I go about drilling brushes?
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Old 06-03-2004, 06:25 PM   #1575
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Take a 1/16th drill bit and using your fingers, roll it gently in the desired area of the face. You can get a different effect by drilling in different areas. If you drill more to the leading edge, you'll get less free spin and a little more torque. If you drill in the center, you get a great ballance of everything (most widley used). If you drill to the trailing edge, you'll get more free spin (off power) and it will act like a timed brush but without actually trimming the brush shape.
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