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Plain 1938-1945 Flathead Alternator Bracket

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Specs
Material Type:
Steel
Sold in Quantity:
Each
Finish:
Zinc
Belt Width:
.63
Notes
May require some modification for alternator fitment.
Plain 1938-1945 Flathead Alternator BracketPlain 1938-1945 Flathead Alternator Bracket
Plain 1938-1945 Flathead Alternator Bracket

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Plain 1938-1945 Flathead Alternator Bracket

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What's in the Box

If you're converting your Flathead-powered car or truck to a 12-volt electrical system, you'll need a modern alternator for proper charging. This bracket mounts the ever-popular GM 1-wire alternator to a 1938-1945 Flathead Ford V8. The plain steel bracket can easily be painted to match your engine.

  • Center mounts GM SI-style alternators
  • Must use with the single 5/8" wide belt
  • Must use with the early "short" water pumps

Mounting Guide (Link)

You may also be interested in:

Offenhauser 1093 37-48 Flathead Drve Side Head Mount Generator Bracket
                        

These cast aluminum brackets for 1937-1948 Flathead Ford V-8 relocate your generator above the cylinder head to make room for multi-carb manifolds, air cleaners, etc. Must be used with stud kit 916-67912.

 

  • Bolt Boss Thickness:  1-1/4"
  • Inside Width:  2-1/2"
Note: This bracket is designed to mount an original stock 6V generator, but it could also be used with a bracket such as 916-67908 or 916-67907 to mount a GM 1-wire alternator.

Cylinder Head Mount Chart (Link)

 

Powergen 1939-48 Flathead Ford One Wire Alternator, 12 Volt
                        

If you like traditional looks and modern performance, you’re gonna love this cool Flathead 1-wire alternator. It has the look of an original generator, but is really a 12-volt, negative-ground alternator that produces 60 amps at idle and 75 amps going down the road.

Designed to fit 1939-1948 Ford & Mercury Cars and 1939-1947 Ford Trucks with Flathead V8s. These feature a simple one-wire hookup and are available in black or polished aluminum.

  • Retains original generator appearance
  • Easy one-wire hookup
  • 60 amps at idle
  • 75 amps at road speed
  • Uses stock mounting bracket
  • Includes pulley for 5/8" wide belt
  • Pulleys for 3/8" wide belt available seperately

Flathead Ford One Wire Alternator Instructions (PDF)

Powergen Cutaway View (Link) 

1937-48 Flathead Stock-Style Water Pump with Wide Belt
                        Original Flathead water pumps have always suffered from unreliable bronze bushings and carbon seals. They almost always leaked and even Ford manuals warned mechanics not to tighten fan belts too tight. The excess slack allowed belts to slip and lose contact with the generator and water pump pulleys, causing more cooling and power problems. 

Speedway's completely new water pumps feature severe-duty roller and ball bearings, close tolerances and modular impellers to provide maximum flow and reduce cavitation. They also have modern ceramic seals on a heavy duty 5/8" shaft, making the assembly exceptionally strong and more efficient. All mounting areas are spot faced for improved fit and sealing.

  • All-new high-nickel iron castings
  • Severe-duty roller and ball bearings
  • Ceramic seals on sturdy 3/4" shaft
  • High-flow modular impeller reduces cavitation
  • Gaskets included
  • For systems with 5/8" drive belts

Factory replacement for 1937-1948 Ford and Mercury cars and trucks. Includes gaskets.

Water Pump Features (GIF)

910-15593 Instructions (PDF)

Chrome 1938-1945 Flathead Alternator Bracket
                        

If you're converting your Flathead-powered car or truck to a 12-volt electrical system, you'll need a modern alternator for proper charging. This bracket mounts the ever-popular GM 1-wire alternator to a 1938-1945 Flathead Ford V8. Features a deep chrome plating that is sure to last.

  • Center mounts GM SI-style alternators
  • Must use with the single 5/8" wide belt
  • Must use with the early "short" water pumps

Mounting Guide (Link)

1973-86 GM Chrome Alternator, Internal Regulator, 60 Amp
                        

All-new high output 60 amp 1973-86 GM style 3-wire internally regulated chrome alternator.

Powermaster 37293 GM 12SI 150 Amp Alternator, Chrome
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 150 amp with 90 amps at idle, and 125 amps at cruising speed

Powermaster 37293 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 47294 GM 12SI 150 Amp Alternator, Natural
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 150 amp with 90 amps at idle, and 125 amps at cruising speed
  • Black finish with fan baffle

Powermaster 47294 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 57294 GM 12SI 150 Amp Alternator, Black
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 150 amp with 90 amps at idle, and 125 amps at cruising speed
  • Black finish with fan baffle

Powermaster 57294 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 17294 GM 12SI 100 Amp Alternator, Chrome
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 100 amp with 70 amps at idle, and 90 amps at cruising speed
  • High quality chrome finish

Powermaster 17294 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 27294 GM 12SI 100 Amp Alternator, Polished
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 100 amp with 70 amps at idle, and 90 amps at cruising speed
  • Hand buffed, polished, and high colored for beautiful polished finish

Powermaster 27294 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 7294 GM 12SI 100 Amp Alternator, Natural
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 100 amp with 70 amps at idle, and 90 amps at cruising speed
  • Natural finish for stock appearing applications

Powermaster 7294 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

 

Powermaster 57297 GM 12SI 150 Amp Smooth Look Alternator, Black
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 150 amp with 90 amps at idle, and 125 amps at cruising speed
  • Black finish with fan baffle and custom Smooth Look

Powermaster 57297 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

Powermaster 67293 GM 12SI 150 Amp Alternator, Polished
                        

Powermaster's most popular GM alternator fits most models, 1965-'85 with straight mount 6.61 inch bolt spacing. 

  • Works as 1 or 3 wire operation
  • Internally regulated
  • Pulley included, single groove
  • V-belt style
  • 150 amp with 90 amps at idle, and 125 amps at cruising speed
  • Hand buffed, polished, and high colored for beautiful polished finish

Powermaster 67293 Alternator Instructions (PDF)

Powermaster Alternator FAQ's (Link)

See the difference between the popluar alternators we offer by reading our tech article, GM Alternator Buying Guide (Link) and learn how to correctly install your new 1-wire alternator by reading our tech article, 1-Wire Alternator Conversion (Link).

Warranties

Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.  

Powermaster will provide all warranty service and technical support regarding warranty claims and inquiries directly to the purchaser to resolve any warranty claims or necessary technical support for warranty resolution.  Speedway Motors is not able to service, warranty, or replace any unit that has a warranty consideration.  As such, the component or components are to be returned to Powermaster and not to Speedway Motors.  

All customers service inquiries pertaining to warranty and defect claims are to be directed to Powermaster and not to Speedway Motors:


Powermaster Customer & Tech Support

Phone: (630) 957-4019

Email: tech@powermasterperformance.com


Any Powermaster product that is returned directly to Speedway Motors that is not in a new condition, and that is being returned for warranty replacement or refund consideration will be immediately forwarded on to Powermaster from Speedway Motors on behalf of the purchaser with no further action taken until received by Powermaster.  Powermaster will then will provide both the purchaser and Speedway Motors with final resolution as to the warranty claim.

GM Alternator, 5/8 Inch Wide Alternator Belt Pulley, Plain
                        

So you've converted your Flathead-powered rod over to 12 volts and bolted a GM alternator in place. Now it's time to install the belt, but your engine pulley is 5/8" and the alternator is 1/2"!

Don’t worry, Speedway has you covered. This alternator pulley allows the use of a 5/8" wide Flathead-style belt on GM externally regulated, SI and one-wire alternators.

Offenhauser 3499 1945-1948 Flathead Fan Carrier Bracket
                        

Aluminum fan carrier bracket fits 1945-1948 Flatheads with either stock intake manifold or Offy aluminum intakes with fan bracket provisions. Width of bracket where it mounts onto the manifold is 2-1/4".

Mounting Chart (Part A in Chart)