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Author Topic: 8 AMP MAG TIMING  (Read 642 times)

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Offline ALKY691

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8 AMP MAG TIMING
« on: July 12, 2014, 12:48:09 am »
HEY GUYS TRYING TO TIME ,WITH A BUZZ BOX, A 8 AMP MAG FROM SPUD, ITS BRAND NEW AND NO MATTER WHAT I DO THE BUZZ BOX WONT QUIT BUZZN, I M HOOKED TO RED AND BLACK WIRES AT MAG, ANY IDEAS? CHECKED POINT GAP ITS OK, CAN I SETUP LIKE A MAG 3? WTF AM I DOING WRONG? GOT 2 IDENTICAL MAGS SAME RESULT.

Offline dragcars

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Re: 8 AMP MAG TIMING
« Reply #1 on: July 12, 2014, 06:48:09 pm »
Pull the cap and make sure the points are closing and opening correctly. I just got burned on our last outing chasing a problem only to discover the rub block shifted and only allowed the points to open .005 on a BRAND NEW SM VIII.

Frank
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Offline Carbutcher

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Re: 8 AMP MAG TIMING
« Reply #2 on: July 13, 2014, 07:52:37 pm »
You need a late model solid state buzz box or you need to disconnect the external condenser(s)
Timothy Piecuch

Offline Pete Ramey

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Re: 8 AMP MAG TIMING
« Reply #3 on: July 13, 2014, 10:36:26 pm »
put themotor ar 32 BTDC and alighn the cap and rotor. Its timed. You cant time the 8 ampmag with a regular buzz box as mr butcher has stated.

Throw the buzz box away and buy a timing light.

Offline DRE

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Re: 8 AMP MAG TIMING
« Reply #4 on: July 14, 2014, 12:47:31 pm »
Hook up the red as you have done  and the black to anything else BUT the ground wire that comes out the housing
BRUCE DYDA

Offline ALKY691

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Re: 8 AMP MAG TIMING
« Reply #5 on: July 14, 2014, 07:56:14 pm »
Thanks for the help, Spuds got me straitened out, out with the old buzz in with the new!

Offline Spud Miller

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Re: 8 AMP MAG TIMING
« Reply #6 on: July 18, 2014, 09:52:27 am »

 The old ancient buzz boxes (basically just continuity testers) won't work for the big mags. The impedance of the stator winding inside the mag is too low (less than 1 ohm in some cases). That means whether the points are open or closed, an old style continuity tester reads the same. One of our inductive buzz boxes can't be fooled.

 A buzz box really is the best way to get the timing as close as possible before firing the motor. Once running, a timing light that you know is ok with mags is the best way to check and confirm the timing.

 All mags (Super-Mags, Pro-mags or Vertexes) retard several degrees (due to inductance) from idle up to about 4000 RPM or so after which they stabilize. Also, mags hammer back and forth at an idle and the timing will move around due to any slop or clearance in your drive setup. By about 3500 RPM or so, all the clearance is loaded in one direction and you'll see the timing smooth out.

 So...buzz it to get it close, fire it, check it with a light. Bring the engine RPM up to confirm you're getting what you think you're getting going down the track.

 Spud
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Offline Eric David Bru

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Re: 8 AMP MAG TIMING
« Reply #7 on: July 18, 2014, 07:47:30 pm »
http://fuelinjectionent.com/webstore/product_info.php?cPath=22_31&products_id=68

Offline dragcars

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Re: 8 AMP MAG TIMING
« Reply #8 on: July 19, 2014, 05:27:12 pm »
Spud, what is the best (or type) of timing light to use on magnetos?
Frank Kinsley

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Offline Eric David Bru

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Re: 8 AMP MAG TIMING
« Reply #9 on: July 19, 2014, 06:34:23 pm »
This is the best: http://www.frenchgrimes.com/products.htm

EDB

Offline dragcars

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Re: 8 AMP MAG TIMING
« Reply #10 on: July 22, 2014, 08:05:08 pm »
This is the best: http://www.frenchgrimes.com/products.htm

EDB

Thanks Eric, Pete ordered one for us from Grimes. Are you guys going to Epping?
Frank Kinsley

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Offline Eric David Bru

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Re: 8 AMP MAG TIMING
« Reply #11 on: July 22, 2014, 08:07:40 pm »
Are you guys going to Epping?

I hope so.

EDB

Offline dragcars

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Re: 8 AMP MAG TIMING
« Reply #12 on: July 23, 2014, 08:39:58 pm »
Are you guys going to Epping?

I hope so.

EDB

Cool, hope to see you guy's there

Frank
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Re: 8 AMP MAG TIMING
« Reply #12 on: July 23, 2014, 08:39:58 pm »
Stith Printing Deist Safety

 

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