10Si Series Positive and Negative Ground Alternator, 6V to 12V Output

Positive and Negative Ground, 6V 8V 12V Voltage Regulator Set Points

What You Will Find On This Page...

12-volt alternator to 6-volt, This is a special all in one page for the special uses of the Delco Remy type 10si series alternator great for generator to alternator conversion. On this page you will find 6-volt, 8-volt and 12-volt complete alternators in both positive and negative ground configurations. Best Ford 8n tractor generator to alternator conversion. You will also find conversion kits to convert an existing 10si or 12si alternators to 6-volt ,8-volt or 12-volt negative or positive ground, and special wide v-belt pulleys for tractors & antique vehicle generator to alternator conversion, also, universal alternator mounting brackets for easy generator to alternator conversion on your tractor or antique vehicle, plus this page has wiring harnesses for the si series alternators. Use the menu to the left to quickly jump to the section you need.

Help On Choosing The Right 10Si Alternator

When choosing a Delco Remy type 10Si model alternator, there are many considerations. First, what is the polarity of your application. Many cars and trucks use a negative ground configuration, where the case has a direct connection to the negative battery post. Tractors and some automobiles use a positive ground, meaning the case has direct contact with the positive post. Positive grounded alternators should be insulated from the vehicle's common ground, if it is negative. Next, a voltage should be chosen. Most cars and trucks again use a 12-volt system, but some tractors may use 6-volts. The 8-volt option is very uncommon outside of a custom applications. All of these voltages have different amperage ratings. Amperage is a function of voltage and the number of windings on the stator, higher voltage and a greater number of windings will produce more power in the form of amperes. Further, you can choose between a standard voltage regulator for direct replacement in a vehicle or a self-exciting voltage regulator for a custom application ( What is a Self Exciting Alternator? ).

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6-Volt 10Si type Self Exciting (One Wire) Alternators , Negative and Positive Ground
Standard Metal Blasted and Show Quality Chrome Finishes

Below you will find all of the 6-volt 10Si type alternators we carry. You will first find the negative ground section, followed by the positive ground section. Both contain the regular and chrome units, the 35 ampere models on the left and the 53 ampere models on the right. The 10Si model 6-volt alternator, due to its simplicity and longevity, is most common for tractor generator to alternator conversion applications, particularly for Ford 2N, 8N and 9N tractor generator-to-alternator upgrades. These units are self exciting 10si low rpm voltage regulator for easy hook up.

Six Volt Negative Ground & Positive Ground Alternators

6-Volt Self-Exciting Alternators

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General Motors Delco Remy type 10Si series 6-volt alternator with self exciting-voltage regulator and standard bridge rectifier.

10Si Series 6v Alternator. The 6-Volt 10Si series alternator is great for converting old Ford tractors from generator to alternator charging. Look in the "Mounting Brackets" section to convert this alternator to almost any application. 6v positive ground alternator below. 6-volt negative ground alternator. gm 6-volt alternator

10Si Series 6-Volt Negative Ground Alternators
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$119.95 D110SiSE6V35 35 Amp, 6-Volt Delco Remy type 10Si series negative ground alternator with self exciting (one-wire) internal voltage regulator.
$129.95 D110SiSE6V53 53 Amp, 6-Volt Delco Remy type 10Si series negative ground alternator with self exciting (one-wire) internal voltage regulator.

10Si Series 6-Volt Positive Ground Alternators
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$129.95 D110SiSE6V35P 35 Amp, 6-Volt Delco Remy type 10Si series postive ground alternator with self exciting (one-wire) internal voltage regulator.
$139.95 D110SiSE6V53P 53 Amp, 6-Volt Delco Remy type 10Si series postive ground alternator with self exciting (one-wire) internal voltage regulator.

6-Volt Chrome Alternators

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Delco Remy type chrome 10Si series 6-volt alternator with self exciting voltage regulator.

10Si Series 6-Volt Alternators. The 6-Volt 10Si series alternator is great for converting old Ford tractors from generator to alternator charging. Look in the "Mounting Brackets" section to convert this alternator to almost any application.

Chrome 10Si Series 6-Volt, Negative Ground Alternators
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$179.95 D110SiSE6V35C CHROME 6-Volt, 35 Amp Delco-Remy NEGATIVE GROUND 10-SI type alternator W/Self Exciting internal voltage regulator
$189.95 D110SiSE6V53C CHROME 6-Volt, 53 Amp Delco-Remy 10-SI type NEGATIVE GROUND alternator W/Self Exciting internal voltage regulator.

Chrome 10Si Series 6-Volt, Positive Ground Alternators
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$189.95 D110SiSE6V35PC 35 Amp, 6-Volt Delco Remy type 10Si series postive ground alternator with self exciting (one-wire) internal voltage regulator.
$199.95 D110SiSE6V53PC 53 Amp, 6-Volt Delco Remy type 10Si series postive ground alternator with self exciting (one-wire) internal voltage regulator.


8-Volt 10Si type Self Exciting (One Wire) Alternators , Negative and Positive Ground
Standard Metal Blasted and Show Quality Chrome Finishes

Below you will find all of the 8-volt 10Si type alternators we carry. You will first find the negative ground section, followed by the positive ground section. Both contain the regular and chrome units, the 45 ampere models on the left and the 70 ampere models on the right. The 8-volt Delco Remy type 10Si model alternator is very uncommon, but not unheard of. There are some 8-volt tractors, but mostly they are used to give a little extra juice to a 8-volt system. If you opt to go this route, remember to replace all bulbs and lights in the now 8-volt circuit with their 12-volt equivalents.

8-Volt Negative Ground & Positive Ground Alternators

Eight 8-Volt Self-Exciting Alternators

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General Motors Delco Remy type 10Si series 8-volt alternator with self exciting voltage regulator and standard bridge rectifier.

10Si Series 8-Volt Alternator. Used on some tractors and other applications. The 8-Volt 10Si series alternator may be used to give a 6-volt system a little extra power, but be sure to replace bulbs and gauge lights before switching alternators.

10Si Series 8-Volt, Negative Ground Alternators
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$129.95 D110SiSE8V45 10Si Series 8-Volt, 45 Amp Alternator with Self Exciting Voltage Regulator
$139.95 D110SiSE8V70 10Si Series 8-Volt, 70 Amp Alternator with Self Exciting Voltage Regulator

10Si Series 8-Volt, Positive Ground Alternators
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$139.95 D110SiSE8V45P 10Si Series 8-Volt, 45 Amp Positive Ground Alternator with Self Exciting Voltage Regulator
$149.95 D110SiSE8V70P 10Si Series 8-Volt, 70 Amp Positive Ground Alternator with Self Exciting Voltage Regulator

8-Volt Chrome Alternators

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Delco Remy type chrome 10Si series 8-volt alternator with self exciting voltage regulator.

Chrome 10Si Series 8-Volt, Negative Ground Alternators
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$189.95 D110SiSE8V45C Chrome 10Si Series 8-Volt, 45 Amp Alternator with Self Exciting Voltage Regulator.
$199.95 D110SiSE8V70C Chrome 10Si Series 8-Volt, 70 Amp Alternator with Self Exciting Voltage Regulator.

Chrome 10Si Series 8-Volt, Positive Ground Alternators
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$199.95 D110SiSE8V45PC Chrome 10Si Series 8-Volt, 45 Amp Positive Ground Alternator with Self Exciting Voltage Regulator.
$209.95 D110SiSE8V70PC Chrome 10Si Series 8-Volt, 70 Amp Positive Ground Alternator with Self Exciting Voltage Regulator.

12-Volt 10Si type Standard Hookup and Self Exciting (One Wire) Alternators, Negative and Positive Ground
Standard Metal Blasted and Show Quality Chrome Finishes

Below you will find all of the 12-volt 10Si type alternators we carry. You will first find the negative ground section, followed by the positive ground section. Both contain the regular and chrome units, the 105 ampere models on the left and the 140 ampere models on the right. The 12-volt Delco Remy 10Si model alternator is most common with cars and trucks, very few tractors run 12-volt. Many people will, however, convert their existing 6-volt systems to 12-volt, to make finding and repairing the alternator easier. This is quite a process and requires changes to lights, gagues, battery wires and some other electrical components.

12V Negative Ground & Positive Ground Alternators

Twelve 12-Volt Self-Exciting Voltage Regulator Alternators

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General Motors Delco Remy type 10Si series 12-volt alternator with self exciting voltage regulator and standard bridge rectifier.

10Si Series 12-Volt Alternators. The most common voltage for the 10Si alternator. Available in SE as well as Standard hookup. Positive and negative bridge rectifiers available.

10Si Series 12-Volt Self Exciting Voltage Regulator Negative Ground Alternators
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$99.95 D110SiSE12V63 63 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator
$139.95 D110SiSE12V105 105 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator
$179.95 D110SiSE12V140 140 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator

10Si Series, 12-Volt, Self Exciting Voltage Regulator, Positive Ground Alternators
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$119.95 D110SiSE12V63P 63 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator
$149.95 D110SiSE12V105P 105 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator.
$189.95 D110SiSE12V140P 140 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator.

12-Volt Standard Voltage Regulator Alternators

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Delco Remy type 10Si series 12-volt alternator with standard voltage regulator.
10Si Series 12-Volt Standard Hookup Voltage Regulator Positive & Negative Ground Alternators
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NEGATIVE GROUND
$89.95 D110Si12V63 63 Amp. Delco-Remy 10-SI type Regulator Alternator
$129.95 D110Si12V105 105 Amp. Delco-Remy 10-SI type Internal Regulator Alternator.
$169.95 D110Si12V140 140 Amp. Delco-Remy 10-SI type Internal Regulator Alternator, Standard Hookup.

POSITIVE GROUND
$109.95 D110Si12V63P 63 Amp., Positive Ground, Delco-Remy 10-SI type Regulator Alternator
$139.95 D110Si12V105P 105 Amp., Positive Ground, Delco-Remy 10-SI type Internal Regulator Alternator.
$179.95 D110Si12V140P 140 Amp, Positive Ground, Delco-Remy 10-SI type Internal Regulator Alternator, Standard Hookup.



12-Volt Self Exciting Chrome Alternators

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Delco Remy type chrome 10Si series 12-volt alternator with self exciting voltage regulator.
Chrome 10Si Series 12-Volt Self Exciting Voltage Regulator Negative Ground Alternators
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$209.95 D110SiSE12V105C Chrome 105 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator.
$239.95 D110SiSE12V140C Chrome 140 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator

Chrome 10Si Series 12-Volt Self Exciting Voltage Regulator Positive Ground Alternators
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$239.95 D110SiSE12V105PC Chrome 105 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator
$249.95 D110SiSE12V140PC Chrome 140 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator

12-Volt Standard Chrome Alternators

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Delco Remy type chrome 10Si series 12-volt alternator with standard voltage regulator.
Chrome 10Si Series 12-Volt Standard Voltage Regulator Negative Ground Alternators
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$209.95 D110Si12V105C Chrome 105 Amp. Delco-Remy 10-SI type Internal Regulator Alternator
$229.95 D110Si12V140C Chrome 140 Amp. Delco-Remy 10-SI type Internal Regulator Alternator, Standard Hookup

10Si and 12Si type Alternator Conversion Kits

How to Convert the Delco Remy 10Si Type Alternator to 6-Volt, 8-Volt, 12-Volt Positive or Negative Ground System

Converting GM based alternators to 6-volt positive ground is easy

Below are two pictures of the inside of the GM based, Delco-Remy type 10-Si series alternator in both negative ground (left picture) and positive ground (right) versions.

Negative Ground 10Si Alternator Internal

The Negative Ground 6-volt, 8-volt, 12-volt or 24-volt GM based alternator above is configured the same as the standard 12-volt negative ground alternator. Note the position of the white insulators on the three screws securing the brush holder assembly and voltage regulator. The two lower screws are insulated and the third screw near the top of the photo does not have an insulator. The Standard-Hookup requires an ignition wire to the #1 terminal to activate the alternator. The Self Exciting (one-wire) version automatically turns the alternator on when you start the vehicle and rev the motor slightly. On the self exciting units you can also use an ignition wire at the #1 terminal to start the alternator. If you use the ignition wire to the #1 terminal you will not need to rev the motor to get the alternator to start charging but your no-charge light (if you have one) in the dash will not work. Also the Self Exciting setup used leftover magnetism inside the alternator to tell that the alternator is turning so the Voltage regulator will know to turn on and start charging. If your engine turn to slow (like a tractor) or sits around for along time the alternator will loose this magnetism and you will need to manually "excite" the alternator.

HOW TO EXCITE AN ALTERNATOR . To "Excite" a Negative Ground One-Wire ( Self Exciting ) alternator you must have the vehicle running. With the engine running you run a momentary jumper from the positive battery post to the #1 spade terminal. If you hit the #2 terminal it will not hurt anything so I just put the jumper between both the #1& #2 terminal, just because it's easier. This will start the alternator charging then once you shut the motor off and restart & rev the motor you should not have to re-excite the alterantor.

Positive Ground 10Si Alternator Internal View

For the 6, 8, 12 or 24-volt Positive ground application you must wire the alternator like the one shown above. Note the three screws that hold the brush holder assembly and voltage regulator, all three are insulated.

After you have installed the positive ground rectifier you must wire the alternator using the red jumper shown above. The voltage regulator in these positive ground alternators are still negative ground. The only component that makes the alternator positive ground is the rectifier. The red jumper wire is connected between the (negative) "Bat" stud on the rectifier to the ground screw for the voltage regulator. The ring terminal on the red wire must contact the ground clip on the brush holder but be insulated from the screw.

Also, when installing the stator and connecting it to the rectifier as shown above on the right side of the picture where the three nuts are. These 3 stator terminals must be lifted a bit so the rear of the terminals do not contact the finned part of the rectifier. The stator leads shorted to the rectifier or inside case is a common problem.

Once the alternator is complete and installed on the vehicle you may need to excite the alternator for the first time.

HOW TO EXCITE A POSITIVE GROUND ALTERNATOR To excite the Positive Ground One-Wire ( Self Exciting ) alternator you run a jumper from the case (positive power) to the #1 spade terminal on the alternator. With the motor running you momentarily touch the jumper from the case to the #1 terminal, then alternator should start charging. After you have run the vehicle for a bit at above idle speed the voltage should build to around 7.5-volts. As in the negative ground unit you can touch the jumper between both the #1& #2 terminals. Once you excited the alternator you should be able to turn the motor off then restart and rev the motor and the alternator will start charging.


Negative Ground and Positive Ground Conversion Kits for the Delco-Remy 10Si Type Alternator Contain:

  • (1) 6-Volt or 8-Volt or 12-Volt or 24-Volt Voltage Regulator used in both Negative and Positive Ground Alternators
  • (1) Brush Holder Assembly
  • (1) Heavy Duty Diode Trio
  • (1) Negative Ground or Positive Ground Premium Rectifier depending on polarity of kit.
  • (1) Positive Battery Terminal Kit (part # 491503)
  • (3) Brush Holder/Regulator screws (2-insulated 1-noninsulated screws for Negative Ground)( Positive Ground kit has all 3 screws insulated)
  • (1) Red Jumper Wire ( Positive Ground Kit only )


Negative Ground Self Exciting (One Wire) and Standard Hook -up Voltage Alternator Conversion Kits

Converts any Delco Remy 10Si type alternator of any amperage to negative ground with a self-exciting (one wire) or standard voltage regulator.

Negative Ground Self Exciting Conversion Kits for 10Si Series Alternators
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$34.95 D110SiSE6VCK 6V, Negative Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an six volt negative ground alternator.

$34.95 D110SiSE8VCK 8V, Negative Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an eight volt negative ground alternator.

$34.95 D110SiSE12VCK 12V, Negative Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an twelve volt negative ground alternator.

Negative Ground Standard Hookup Conversion Kits for 10Si Series Alternators
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$34.95 D110Si12VCK 12V, Negative Ground Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an twelve volt negative ground alternator.

10Si Positive Ground Voltage Regulator Conversion Kits

Converts any Delco Remy 10Si type alternator of any amperage to Positive Ground with a self-exciting or Standard Hook-up voltage regulator.


Positive Ground Self Exciting Conversion Kits for 10Si Series Alternators
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$39.95 D110SiSE6VCKP 6V, Positive Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an six volt positive ground alternator.

$39.95 D110SiSE8VCKP 8V, Positive Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an eight volt positive ground alternator.

$39.95 D110SiSE12VCKP 12V, Positive Ground, Self Exciting (One Wire) Alternator Conversion Kit for 10Si Series Alternators. Converts any voltage Delco Remy type 10Si series alternator of any amperage into an twelve volt positive ground alternator.

10Si Chrome Alternator Conversion Kit

Chrome Conversion Kit for 10Si Alternators

Great for custom hot rods and rebuilt tractors. Details count when showing off your ride. These chrome kits look great replacing generators in classic hot rods and tractors.

10Si Series Chrome Alternator Conversion Kit
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$129.95 D110Si00C Chrome Alternator Conversion Kit. For Delco type 10Si Series Alternators.

10Si Specialty Fans

Run Your 10Si Series Alternator Both Clockwise or Counter-Clockwise Rotation

Normally, 10Si series alternator fans are set up to run in a clockwise fashion. Bidirectional fan blades allow you to run your alternator in either clockwise or counter-clockwise rotations.

Bidirectional 10Si Series Alternator Cooling Fan
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$19.95 25104 Bi-directional fan for Delco type 10Si/20Si series alternators.

Wide V-Belt Pulleys

Single Groove Pulleys, Wide Pulleys, Extra Wide Pulleys

Category Title
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$23.95 A202 Wide belt pulley (15/32" and 1/2") for industrial and agricultural applications. 2-1/2" diameter, small enough for adequate RPM on slower speed motors, large enough for long belt life. Cold rolled steel, .670" bore for Delco and Ford alternators.

$25.95 A203 Extra wide belt pulley (5/8", 21/32", 11/16" and 3/4") for industrial and agricultural applications. 2-1/2" diameter. Cold rolled steel, .670" bore with special long neck nut.

10 Si Alternator Wiring Harness

Alternator Wiring Adapter Harnesses, Universal Alternator Mounting Brackets, Alternator Wiring Repair Harnesses

Wiring Adapter and Repair Harnesses
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$12.95 461873 Anti-feed back harness w/ diode for Delco 10Si, 12Si, 15Si, 17Si and 27SI Series IR/EF Alternators.

$7.95 461801 Regulator repair harness for Delco 10SI, 12SI, 15SI, 17SI, 27SI/Type 100 Series IR/EF Alternators. Fits plug code 151.

$9.95 461869 Plug extension for Delco 10SI, 12SI, 15SI, 17SI, 27SI Series IR/EF Alternators. Extends wire harness to allow for additional clock positions. Fits plug code 151.

Universal Alternator Mounting Brackets

Tractor Generator to Alternator Conversion Brackets

Universal Alternator Mounting Brackets
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$32.95 A200 Universal alternator bracket to install Delco, Ford and Chrysler alternators in place of generators that have 2 mounting ears. Ideal for ag. industrial and older vehicles. Bolts to existing 2 ear generator mounting bracket. Complete with hardware.

$9.95 A210 Universal belt tensioner extension bracket. Use with alternator conversions. Design allows angles up to 45 degrees.

$28.95 A215 Curved belt tensioner extension bracket. 1/4" thick x 1-1/4" wide curved end bar. Can be bolted or welded to existing bracket. Unplated for welding.

$29.95 A220 Heavy duty curved belt tensioner extension bracket. Heavier 3/8" thick x 1-1/4" wide curved end bar. For "truck type" J-180 alternator installations. Can be bolted or welded to existing bracket. Unplated for welding.

$29.95 A255 Ford 2N, 8N, & 9N right side Generator to Delco-Remy Alternator. For use on tractors that have the generator on the right side.

$44.95 A265 Ford 8N conversion bracket to install Delco Remy or Ford alternator on tractors w/ generator on left side, 1952 and later. For use on tractors that have the generator on the left side.

$34.95 A270 Delco-Remy to Chrysler bracket, install Delco alternator on Chrysler vehicles. Complete with hardware.

$28.95 A275 Delco-Remy to Motorola bracket, install Delco alternator with 2" mount in place of Motorola with 1" mount. Complete with hardware.

$34.95 A285 Install Delco-Remy or Ford alternators on vehicles with dual foot alternators. Used on Arrow, Colt, Courier, Nissan, Datsun, Luv, Mazda, Subaru, Toyota and Industrial applications. Complete with hardware. *A210 belt tension extension may be needed.

$44.95 A290 Delco Remy 2" mount to Delco Remy dual ear mount bracket. For use on vehicles with Delco Remy 27Si model, type 100 alternators. Complete with hardware.

$19.95 A300 Universal welding bracket for Delco-Remy alternators With 2" mount. For custom welding to customer supplied engine bracket. Unplated for welding. Complete with hardware.