Installation User Manual

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MSD DynaForce High Speed Starter

FORD 289, 302, 351W

3/4" Depth, PN 50902

Parts Included:

1 - Starter 1 - Shim Ring 1 - Outer Shim

WARNING: Before installing the DynaForce Starter disconnect the battery cables. When disconnecting

the battery cables, always remove the Negative (-) cable ﬁrst and install it last.

IMPORTANT: Proper installation of the DynaForce Starter is important to the overall operation. Correct alignment

of the starter pinion with the ring gear is needed to achieve the best operation and longevity from

your starter. Please read the instructions before attempting the installation.

When selecting a starter for your Ford, our research has found that year, model and drivetrain

combination do not always dictate the correct starter. There are variations between the 164 tooth and

157 tooth ﬂywheels and well as the inside diameter of the starter block plate (4.130” or 4.084”). MSD

offers two starters for the 289/302 and 351W engines; one with a 3/8th depth ring gear, one with a

¾” depth. Figure 1 shows the differences and applications.

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your product will help

if there is ever a warranty issue with your product and helps the MSD R&D team create new products that

you ask for! Go to www.msdperformance.com/registration.

ENGINE BLOCK PLATE

TRANSMISSION

USE

PN 50902

USE

PN 50901

3/4”

3/8”

RING GEAR TEETH TRANSMISSION STARTER REGISTRY DIAMETER DEPTH STARTER

164 4-speed 4.130" 3/8" PN 50901

164 Automatic 4.084" 3/4" PN 5090

157 4-speed and Auto 4.084" 3/4" PN 5090

Note that these are generally the applications, however there are variables.

Figure 1 Ring Gear Depth and Bell Housing/Engine Block Identiﬁcation.

Thank you for purchasing the DynaForce High Speed Starter from MSD. Thanks to special gearing

and other design features, the High Speed starter spins 25% faster than our traditional DynaForce

starters. This extra speed is ideal for engines with magnetos or blown alcohol. Please be sure to read,

understand, and follow the instructions prior to installation so that everything goes smoothly and the

engine starts reliably time after time.

Summary of content (4 pages)

PAGE 1
MSD DynaForce High Speed Starter FORD 289, 302, 351W 3/4" Depth, PN 50902 ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your product will help if there is ever a warranty issue with your product and helps the MSD R&D team create new products that you ask for! Go to www.msdperformance.com/registration. IMPORTANT: Proper installation of the DynaForce Starter is important to the overall operation.
PAGE 2
INSTALLATION INSTRUCTIONS When using OEM bell housings, it must be paired with the corresponding flywheel and ring gear. Many aftermarket bellhousings feature a punch out to allow both to be used. CLOCKING LOCATIONS INSTALLATION 1. Make sure the starter mounting flange on the mid plate is clean and smooth. 2. Before mounting the starter, measure the distance from the front of the ring gear (engine side) to the starter mounting surface (Figure 2). Figure 2 Clocking the Starter for Clearance.
PAGE 3
INSTALLATION INSTRUCTIONS 3 12-GAUGE MINIMUM TO IGNITION SWITCH CABLE LENGTH VS. GAUGE LENGTH 3’ 5’ 7’ 10’ +10’ AWG 4 2 1 0 00 + BATTERY Figure 4 Wiring the Starter. FACTORY REMOTE SOLENOID TO IGNITION SWITCH 10-12 GAUGE + BATTERY Figure 5 Wiring to Incorporate Factory Solenoid. INSTALLATION INFO INSPECT PINION GEAR After cranking the engine several times, you can inspect the witness pattern on the pinion gear. The pattern should show 1/4" to 3/8".
PAGE 4
DISCONNECT SWITCHES Most sanctioning bodies require an emergency disconnect switch. Be sure to use a heavy duty switch that is capable of handling high current. Some starters may pull over 700 amps while cranking. Most disconnect switches are rated at continuous and intermittent amps. Make sure to use a switch that exceeds your starting and electrical system requirements.