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Old 10-07-2006, 02:15 PM   #1
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Default if you own a copy of Big Jims black book reply to this

im in need of some help. i have looked for the black book and havent found one for cheeper than 15.00. i have an extremely old epic motor and the sticker had come off. therefore the timing marks have also come off. i need to kno how to set the timing based on the position of the vent holes and the timing point on the endbell. if anyone has a cheap copy of the black book i would be extremely interested in it.

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Old 10-07-2006, 05:55 PM   #2
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any info would be great. its kinda hard to set a motor up wthout timing marks

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Old 10-07-2006, 07:27 PM   #3
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get a timing jig.
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Old 10-07-2006, 07:30 PM   #4
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and where might i find one of those??

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Old 10-07-2006, 07:36 PM   #5
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From page 117 of the "Black Book"..:

Quote:
Each degree of timing is about .0125" off of the center, at the radius of the motor. The "hash" marks molded into the endbell in the advanced direction of most mod motors, is about .150" apart so each mark represents 12 degrees.
Does that help?
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Old 10-07-2006, 07:37 PM   #6
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thanks but i have no timing marks at all. not even a center 0degree mark. all i have on the enbell is a little arrow which is what you line up with the timing marks

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Old 10-07-2006, 07:38 PM   #7
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here
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Old 10-07-2006, 07:40 PM   #8
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The can should have a "dimple" centered between the magnets.. The endbell retaining ring has notches that slip over these....

The Zero Degree point is normally CENTERED on the dimple between the magnets. Use that as you zero point...
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Old 10-07-2006, 07:43 PM   #9
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thats what i needed! ok, you dont happen to have another copy of tha black book do you?

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Old 10-07-2006, 08:01 PM   #10
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No... sorry
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Old 10-07-2006, 08:02 PM   #11
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man...i cant find one for the life of me. i did find one but it was missing like 20 pages and was beat to hell

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Old 10-07-2006, 08:14 PM   #12
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also, whats a good timing set for a 15t 4WD off road motor on 6 cells?

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Old 10-08-2006, 01:44 AM   #13
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This is the majority of the black book.

http://www.hobbytalk.com/bbs1/showthread.php?t=126994
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Old 10-08-2006, 11:12 AM   #14
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Quote:
Originally Posted by WheelNut
This is the majority of the black book.

http://www.hobbytalk.com/bbs1/showthread.php?t=126994
Thanks for posting this. What a wealth of information. He's answering a lot of the questions I've been asking.
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Old 10-08-2006, 11:44 AM   #15
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Quote:
Originally Posted by mat3833
also, whats a good timing set for a 15t 4WD off road motor on 6 cells?

Matt
Depends on the brush type and some other factors, but....

For P94's I generally stay in the 12-18 degree range, but some 15t will be happy up to 24 degrees (just watch the gearing/temp)...

For V2's, they have less overlap, so the leading edge is not as far advanced, so I can go 18-24 no problem for 15t, but that assumes good magnets, heavy springs and enduro brush... I'd stay 12-18 if using sprint brushes or softer springs or if the magnets have lost some "zap"...

None of that is gospel, so watch motor temp and adjust timing and/or gearing accordingly. 4wd likes power, and more timing makes more power, but sacrifices efficiency and generates more heat. For tighter, more technical tracks, lower the timing to 12 degrees to trade some RPM for torque to pull you out of the corners, etc...
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