Msd 8991 / French grimes timing light

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
houser45
Pro
Pro
Posts: 279
Joined: Thu Apr 24, 2014 10:05 pm
Location:

Msd 8991 / French grimes timing light

Post by houser45 »

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
Guru
Guru
Posts: 8686
Joined: Sun Jan 21, 2007 1:16 pm
Location: Victoria BC Canada

Re: Msd 8991 / French grimes timing light

Post by ProPower engines »

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
Expert
Expert
Posts: 802
Joined: Wed Jul 25, 2007 6:15 am
Location: Oklahoma

Re: Msd 8991 / French grimes timing light

Post by RCJ »

Aaa are 1.5 volts.installed in series ,wouldn’t that be 9 volts
Protech Racing
Member
Member
Posts: 81
Joined: Tue Nov 28, 2017 2:51 pm
Location:

Re: Msd 8991 / French grimes timing light

Post by Protech Racing »

Start with 3 V , add on until it works . Under 9V
Tuner
Guru
Guru
Posts: 3184
Joined: Sun Apr 01, 2007 5:26 am
Location:

Re: Msd 8991 / French grimes timing light

Post by Tuner »

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
Pro
Pro
Posts: 471
Joined: Tue Nov 18, 2008 10:20 am
Location: upstate NY

Re: Msd 8991 / French grimes timing light

Post by leahymtsps »

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
Pro
Pro
Posts: 279
Joined: Thu Apr 24, 2014 10:05 pm
Location:

Re: Msd 8991 / French grimes timing light

Post by houser45 »

Thank you
Post Reply