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We Are Now Offering An AC Motor Controller Upgrade For The E-Z-GO RXV Golf Cars.
Our "Original" AC Drive System For Golf Cars Just Got A Whole Lot Better With The Introduction of an Automatic Parking Brake!!

HPEVS Golf Car Drive Systems

The "ORIGINAL", and still the best AC drive system available for your golf car!

Now Our Golf Car Drive Systems Come With
a 5 Year Warranty!!
We have Designed and Developed A Lithium-Ion Battery Kit For Golf Cars That Is Completely Integrated With The HPEVS Golf Car AC Drive Systems

Mining Vehicle Systems

Specialty motors designed and built for your specific applications!





To get information, please click on "Details" tab below.
96 Volt Automotive Systems

This is one of many systems available for auto conversions!



To get information, please click on "Details" tab below.
Utility Vehicle Systems


We have a drive system to fulfill your utility vehicle requirements!




To get information, please click on "Details" tab below.
Diagnostic and Troubleshooting Documentation.





To obtain this information, please click on "Details" tab below.

We have added to our website dimensional drawings of the Curtis Instruments controllers.

These drawings can be helpful during the design phase of a project.

To get information, please click on "Details" tab below.
Hosts Mike Brewer and Edd China From The TV Show Wheeler Dealers Teamed Up with EV West to Install a HPEVS Drive System Into a 1985 Maserati Bi Turbo

It is Amazing To Us To See What Can Be Done With Our Drive Systems! Here Is Yet Another Example!

The Folks at EV West Have Created a Vehicle with One of Our Drive Systems!



To get information, please click on "Details" tab below.


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AC 3X



The AC 35 motor is designed for use in multiple applications that are listed below. It is capable of producing 63 horsepower at 2900 RPM while delivering 129 ft-lbs. of torque at 96 volts, and 650 amps(1238-7601). It is available in several different configurations depending on your needs.

In addition to the AC 35 motor we are producing a second version of the same motor size and calling it an AC 34. This motor was designed to extend the "knee" out further into the RPM range. So with the same 96 volt/650 amp controller(1238-7601), the torque reduces a bit down to 107 ft-lbs. of torque while the horsepower increases to 65 horsepower. All of these subtle changes and the knee extending out to 3800 RPM.

The motor identifications on this page have been changed to "AC 3X" to reflect the addition of the AC-34 into the AC-35 family.



The weight of this motor is around 85 pounds/38.5 Kg.

Link to power graphs: AC-34 POWER GRAPHS!!
Link to power graphs: AC-35 POWER GRAPHS!!



Here is a list of the typical applications for which this motor can be applied:

• Utility Vehicles
• Light Automotive
• Ground Support
• Motorcycle
• Mining
• Hydraulic Pump



Please contact us with any questions you might have:

OEM customers, please contact us


Of course all our systems are backed by an HPEVS and Curtis



Controller Options are as follows:

• 1238-6501 (72V 550A)
• 1239E-7621 (96V 650A) » 12 volt logic «
• 1239E-8521 (144V 500A) » 12 volt logic «



AC 3X-16.02

19 Spline

product image 2

Dana/Spicer or
Team Industries differential



AC 3X-19.02

19 Spline

product image 2

Taylor-Dunn style differential
Enclosed (not water proof) housing


AC 3X-26.25

B-Face

product image 2

1 1/8" keyed shaft






AC 3X-26.34

B-Face Vented



1 1/8" Keyed Stub Shaft
with 7/8" Auxiliary Shaft




AC 3X-27.25

B-Face

product image 2

1 1/8" keyed shaft
Enclosed (not water proof) housing




AC 3X-28.25

C-Face

product image 2

1 1/8" keyed shaft






AC 3X-28.34

C-Face Vented



1 1/8" Keyed Stub Shaft
with 7/8" Auxiliary Shaft




AC 3X-31.08

SAE B Pump Flange


SAE B 15T Pump Coupler with Base




AC 3X-31.09

SAE B Pump Flange



SAE B 13T Pump Coupler with Base





AC 3X-31.58

SAE B Pump Flange



SAE B 15T Pump Coupler with 7/8" keyed Auxiliary Shaft & Motor Mounting Base


AC 3X-31.59

SAE B Pump Flange



SAE B 13T Pump Coupler with 7/8" keyed Auxiliary Shaft & Motor Mounting Base





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