10Si Alternators, Positive Ground and Negative Ground, Alternators and Parts


This is a special all in one page for the special uses of the Delco Remy type 10SI series alternator. On this page you will find 6-volt, 8-volt and 12-volt complete alternators in both positive and negative ground configurations. Great for Ford 8N tractor generator conversions. 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. We also offer special wide v-belt pulleys for tractors & antique vehicle conversions. Universal mounting brackets for easy installation. Wiring harnesses are also available. SEE TECHNICAL INFO AT THE BOTTOM OF PAGE.

Pricing and Purchase Info!

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10Si Series, Standard Voltage Regulator Alternators

10Si Series 24-Volt Standard Hookup Voltage Regulator Positive & Negative Ground Alternators

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NEGATIVE GROUND

$139.95 D110SiSE24V40 40 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator

POSITIVE GROUND

$119.95 D110SiSE12V63P 63 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator

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.

Self-Exciting 10Si Series Alternators

10Si Series, Self-Exciting, 24-Volt Alternators. Positive and Negative Ground.

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NEGATIVE GROUND

$139.95 D110SiSE24V40 40 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Alternator

POSITIVE GROUND

$119.95 D110SiSE12V63P 63 Amp. Delco-Remy 10-SI type Self Exciting Internal Regulator Positive Ground Alternator

10Si Series, Self-Exciting, 12-Volt Alternators. Positive and Negative Ground.

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NEGATIVE GROUND

$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

POSITIVE GROUND

$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.

10Si Series, Self-Exciting, 8-Volt Alternators. Positive and Negative Ground.

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NEGATIVE GROUND

$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

POSITIVE GROUND

$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

10Si Series, Self-Exciting, 6-Volt Alternators. Positive and Negative Ground

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NEGATIVE GROUND

$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.

POSITIVE GROUND

$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.

Chrome 10Si Series Alternators

12 Volt, Chrome, 10Si Series Alternators. Positive and Negative Ground

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NEGATIVE GROUND

$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
$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

POSITIVE GROUND

$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

6 Volt, Self-Exciting, Chrome, 10Si Series Alternators. Positive and Negative Ground

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NEGATIVE GROUND

$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.

POSITIVE GROUND

$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, Self-Exciting, Chrome, 10Si Series Alternators. Positive and Negative Ground

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NEGATIVE GROUND

$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.

POSITIVE GROUND

$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.

Conversion and Upgrade Kits for 10Si Series Alternators

Self Exciting Conversion Kits for 10Si Series Alternators

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NEGATIVE GROUND

$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.

POSITIVE GROUND

$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.

Standard Regulator 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 Series Chrome Alternator Conversion Kit

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

Alternator Fans, Pulleys, and Parts

Bidirectional 10Si Series Alternator Cooling Fan

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  25104 Bi-directional fan for Delco type 10Si/20Si series alternators.

Wide Belt and Agricultural Pulleys for 10Si Series Alternators

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  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.
  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.

Help On Choosing The Right 10Si Alternator

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. Next, what voltage do you need? Most cars and trucks 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. You can also 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? ).

Unlike the competition, our Si series, self-exciting units include a special low-speed activation circuit. You don't need to rev the engine to get the alternator charging!

At the top of this page you will find all of the 10Si type alternators we carry. Positive and negative ground including regular finish and chromed units. The 10Si model 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. Some units use our self exciting, low-rpm voltage regulator for easy hook up.

6-Volt Self-Exciting 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. 6v positive ground alternator below. 6-volt negative ground alternator. gm 6-volt alternator

Eight Volt Self-Exciting Alternators

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.

Twelve Volt Self-Exciting and Standard Regulator Alternators

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.

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 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 view

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 for activation. With this setup, 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 correctly. The Self Exciting regulator uses residual magnetism from the rotor to switch the regulator on. If your engine turns too slow (for example, a tractor) or sits for a long time the alternator will lose its magnetism and you will need to manually "excite" the alternator.

HOW TO EXCITE A NEGATIVE GROUND 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 alternator.

 

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:

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 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.