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Msd 8991 / French grimes timing light

General engine tech -- Drag Racing to Circle Track

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houser45
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Msd 8991 / French grimes timing light

Post by houser45 » Sun May 10, 2020 8:18 pm

Msd 8991 self powered timing light. I need to retro fit a new aaa battery holder for it or buy a rechargeable pack for it. Does any body know how many volts the original pack for the 6 aaa batteries is wired for? Or could someone check theirs? My original holder is long gone

ProPower engines
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Re: Msd 8991 / French grimes timing light

Post by ProPower engines » Sun May 10, 2020 11:02 pm

houser45 wrote:
Sun May 10, 2020 8:18 pm
Msd 8991 self powered timing light. I need to retro fit a new aaa battery holder for it or buy a rechargeable pack for it. Does any body know how many volts the original pack for the 6 aaa batteries is wired for? Or could someone check theirs? My original holder is long gone
I would call Grimes directly and ask. If they are working these days that would be the best bet.
They may also offer an updated battery pack.
Real Race Cars Don't Have Doors

RCJ
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Re: Msd 8991 / French grimes timing light

Post by RCJ » Mon May 11, 2020 9:54 am

Aaa are 1.5 volts.installed in series ,wouldn’t that be 9 volts

Protech Racing
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Re: Msd 8991 / French grimes timing light

Post by Protech Racing » Tue May 12, 2020 11:20 am

Start with 3 V , add on until it works . Under 9V

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Re: Msd 8991 / French grimes timing light

Post by Tuner » Tue May 12, 2020 10:21 pm

houser45 wrote:
Sun May 10, 2020 8:18 pm
Msd 8991 self powered timing light. I need to retro fit a new aaa battery holder for it or buy a rechargeable pack for it. Does any body know how many volts the original pack for the 6 aaa batteries is wired for? Or could someone check theirs? My original holder is long gone
The compact Kowa Seki timing light uses two AA for 3V and has a brighter flash than regular 12V powered lights. Without having the battery holder for yours so you can figure out if the batteries were wired in parallel for longer battery life or series for higher voltage, be careful not to over-voltage and kill it. It could be two trios of 3 each AAA = 3 Volts, or 3 pairs of 2 each = 4.5 Volts, or all 6 in series for 9 Volts. I would rig it with jumper wires and start with two AA to see if that makes it function with normal brightness.

leahymtsps
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Re: Msd 8991 / French grimes timing light

Post by leahymtsps » Tue May 19, 2020 9:37 am

RCJ wrote:
Mon May 11, 2020 9:54 am
Aaa are 1.5 volts.installed in series ,wouldn’t that be 9 volts
X2
I just checked 1 and it's 9 volts.

Tom

houser45
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Re: Msd 8991 / French grimes timing light

Post by houser45 » Tue May 19, 2020 11:53 am

Thank you

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