Flying Magnet Crank Trigger Kit
Chevrolet Big Block V8 Engines
PN 8620
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Important:
Read the instructions before attempting the installation.
Parts Included:
1 - Trigger Wheel
1 - Pickup Holder Assembly
1 - Non Magnetic Pickup Assembly
1 - Pickup Base
2 - Bolts, 5/16" - 24 x 1¼"
2 - 5/16" Washers
3 - Bolts, 3/8"- 16 x 1¼"
3 - 3/8" Washers
2 - Bolts, 7/16"- 14 x 2" Hex
4 - Spacers
Tech Bulletin #104
Note:
On some vehicles the MSD Crank Trigger Kit may require slight modifications to accommodate
special engine plates, pulley systems, etc.
INSTALLING THE PICKUP AND BRACKET
1. Mount the pickup holder onto the bracket
using the two fine thread bolts (Figure 1).
The pickup base will only install one way,
do not try to force the bolts in, and hand
tighten the bolts.
2. Install the bracket onto the engine. The
bracket may be mounted on either side
of the balancer. Be sure to use the correct
length bolts and shims in the proper
location.
3. Install the pickup and locknut into the
holder. Do not tighten the locknut at this
time.
Figure 1 Pickup Bracket Assembly.
MSD
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WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
INSTALLING THE TRIGGER WHEEL
1. Position the No. 1 cylinder under compression
at the desired total timing.
2. Position the trigger wheel onto the harmonic
balancer so one of the four magnets lines up
with the center of the non magnetic pickup.
Make sure the wheel is mounted so it rotates
in the direction of the arrow on the wheel. If
necessary, slide the pickup in its mount until it
properly lines up with the trigger wheel magnet.
3. Check and make sure the wheel is positioned
correctly with the pickup and torque the trigger
wheel bolts to 25 - 30 lb-ft. The pickup should
be centered to the edge of the trigger wheel
(Figure 2). If not, it may be necessary to add or
delete shims to the pickup bracket to achieve
the proper position.
Figure 2 Pickup Centered on the Trigger Wheel.
Service
In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.
When returning MSD components for warranty service,
Proof of Purchase
must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number
issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include
a detailed account of any problems experienced, and what components and accessories are installed on the vehicle.
The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for
the application they are intending. MSD will accept no liability for custom applications.
M
SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
Limited Warranty
MSD
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WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
© 2014 MSD LLC
FRM29794
Revised 09/14
Printed in U.S.A.
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