Product Summary

One Wire Alternator, Generator Alternator Case Style

  • Specifically designed for the 1949-1953 Flathead Ford
  • Available in a black painted or polished aluminum finish
  • Designed to use stock-appearing bracket and fan carrier bolts
  • Features an easy one-wire hookup and has a 6-volt positive ground
  • Produces 50 amp at idle, 55 amp when cruising, and 60 amp at the top end
See more details

Key Specs

MFG. Part #
One Wire AlternatorYes
Alternator Amperage60 amp
Alternator Finish
Pulley StyleV-belt
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Need To Know

Quick and Easy Returns

Return Policy

Details

If you like traditional looks and reliable, modern performance, you’ll love this cool Flathead alternator. It has the look of an original generator, but is really a 6-volt, positive-ground alternator that produces 50 amps at idle and 55 amps going down the road. This 1-wire alternator is designed to fit 1949-1953 Ford & Mercury Cars and 1948-1953 Ford Trucks with Flathead V8s and features a simple one-wire hookup.

We offer it in black painted or polished aluminum, and both include stock-appearing mounting brackets (the stock fan carrier bolts to that bracket) and pulleys that accept wide 5/8” belts.

  • Easy one-wire hookup
  • 6-volt positive ground
  • 50 amp idle, 55 amp cruise, 60 amp top end
  • 5/8" wide belt pulley included
  • If using 3/8" wide belt, order pulley # 91067178
  • Uses stock-appearing bracket and fan carrier bolts

  

Application

  • Case can be shortened for additional clearance
  • Case diameter is 1/4" larger than a stock generator

Charts

Warranty Information

Do not send the unit back to Speedway Motors unless you have called Powermaster and talked to their Tech Department while the unit was still on the vehicle so they could help you troubleshoot the problem.

Specifications

KEY SPECS
MFG. Part #
BrandPowermaster
One Wire AlternatorYes
Alternator Amperage60 amp
Alternator Finish
Pulley StyleV-belt
Belt TypeV-Belt
GENERAL
Alternator Case StyleGenerator
Voltage Required6-Volt, Positive Ground
RegulatorInternal
Regulator StyleInternal
Regulator IncludedYes
Alternator Pulley IncludedYes
Belt Width0.625"
Alternator Brackets IncludedNo
Color
Sold in QuantityEach
NotesMade in the USA
GTIN Code
Belt IncludedNo
Coating TypePowdercoated

Ratings & Reviews

5

8 Reviews

Overall Assessment

Customers appreciate the product's authenticity, ease of installation, and the improved performance it offers. Many stress that it matches perfectly with their original generator and enhances the vehicle's functionality by effectively charging the battery even at low rpm's, leading to brighter lights and possibly better sparks. The solid construction and period-correct design are also frequently praised. However, some customers suggest the ability to select the correct pulley size upon order would enhance convenience. The product stands as a highly recommended and beneficial upgrade over stock generators.

5

8 reviews

5

8

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Great company to deal with

5.0

a year ago

ron

lake havasu city az

Verified

Excellent product for my 51 country squire, looks original and works as required. Charges at all RPM and lights don't dim at idle.

Would Recommend

yes i would buy this again

5.0

5 years ago

Daryl

tisdale saskatchewan

Verified

this matched up perfectly with the original generator mounting and works perfectly

Would Recommend

Easy generator swap. Looks great too.

5.0

5 years ago

Dak44

Devils Lake, ND

Verified

This fixed my high rpm miss caused by low amp charge on my old generator, and other problems.

Would Recommend

A worthwhile upgrade.

5.0

5 years ago

Peter

Bend, OR

Verified

This was a no-brainer upgrade to my stock '51 flathead generator. It puts our more amps than the generator ever could, on a consistent basis. My lights are brighter for sure. the car seems to run better, perhaps due to a better spark. Plus, it looks period correct. The install was easy and straightforward. I am very happy with this upgrade.

Would Recommend

Keeps my battery fully charged even at low rpm's

5.0

6 years ago

Red F1

Lac Du Flambeau, Wisconsin

Verified

I replaced the original generator on my 1950 Ford F1 pickup truck with this new alternator. Keeps my battery charged even at low rpm's. Looks like original. The mounting bracket fit well. It was very easy to wire up. I just used the original yellow/black wire that went from the generator to truck regulator and connected it to the yellow wire that is connected to the negative side of the battery. Put a ground wire onto the alternator housing and then taped off unused wires. It works great.

Would Recommend

This product is awesome

5.0

6 years ago

Phips

Ma

Verified

I used it with a 2x2 offy manifold on flathead. Had to file a touch of the back casting to clear 94 carb

Would Recommend

Fantastic product

5.0

10 years ago

Pete

Montreal, Quebec

Verified

Great product, easy to install. The only con is that it comes with a 5/8" pulley so we mist purchase a second pulley if we have a 3/8 or 1/2 . Should be able to order with correct pulley and not have to remove and discard the 5/8

Would Recommend

Excellent communication and handling of my order

5.0

11 years ago

Bengt

Karlskoga, SWEDEN

Verified

Extremly happy with the alternator and easy installation. Absolutly awesome. Very, very helpful personal at SPEEDWAY

Would Recommend

Showing 8 of 8 reviews

Questions & Answers

4 Questions • 5 Answers

Hi, I am looking at your 6 volt positive ground, part number 91067174. I have a straight, flathead 6 cylinder. Will this work? Also, do you furnish rewiring directions for the Amp gauge? Will it match up to the existing bracket and belt? Thanks, Rick Lindsay

by Rick

• 7 years ago

2 answers

Hi Guys. can I use this on a negative ground 6v system? Thanks cadatak western australia

by cadatak

• 11 years ago

1 answer

I already purchased this Alternator. I would like to install two small studs on the case to connect the FIELD and Arm leads which are no longer used. Make it look like a correct generator. How do i do this without harming the Alternator??

by snuffy

• 11 years ago

1 answer

Altenater Details Will this bolt up without any modifications? I have an original truck and do not want to alter anything to make it fit. Does it include everything i need to bolt up ? Can i use existing belt ? What would i need to do to get original amp guage to work with this altenater or will it render guage useless? Thanks for your help. This is a 6 volt positive ground system using a generater at this time

by maurice

• 12 years ago

1 answer

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