Q: Does Eaton make aftermarket supercharger kits?
A: Eaton only produces OEM (factory, from the dealer) type superchargers. The Eaton aftermarket business consists of 4 partner companies. These companies purchase certified components and internal sub-assemblies direct from Eaton (bearings, rotors, gears, and seals). These are the same internal components found in the Eaton OEM assemblies. The only difference is that each aftermarket partner company creates its own housing designs to fit the needs of the aftermarket applications. These housings are designed and tested in conjunction with Eaton to ensure proper specifications.
 

Q: How do I get an Eaton aftermarket supercharger kit for my vehicle?
A: Please contact one of the 4 Eaton aftermarket supercharger partner companies. Each company has unique application offerings.
 
www.magnusonproducts.com

1-805-642-8833

www.harrop.com.au
USA 1-269-660-1500
Australia +61 3 9474 0900

www.edelbrock.com
1-800-416-8628

www.roush.com
1-800-59-ROUSH

Q: Can I purchase an upgraded pulley or better rotors from Eaton?
A: Eaton does not manufacture or sell any upgraded parts for OEM or aftermarket superchargers. Rotors and housings are not interchangeable so you cannot upgrade your 5th generation M90 with TVS rotors for example.

Q: I just bought a used Eaton (any model/size) supercharger, will it fit on my car/truck?
A: Any Eaton OEM supercharger is designed specifically for its original application. Extensive fabrication will always be required to use such a supercharger on any other application. Eaton does not sell any parts to adapt Eaton OEM superchargers to any aftermarket applications.

Q: Supercharger model names… I am confused!
A: Eaton has produced many OEM superchargers throughout the years. The “M” series units are denoted only by their displacement in cubic inches. For example, an M90 is 90 in3/revolution. The newer TVS series superchargers are denoted by their displacement in cubic centimeters. For example, a TVS R2300 is 2.3 liters/revolution or 2300 cm3/revolution. There are different configurations of each displacement and they are not generally interchangeable. The aftermarket supercharger partner companies create their own prefixes but generally retain the displacement number. For example, “MP” series units are produced by Magnuson Products, “HTV” series units are produced by Harrop Engineering, and “E-force” series units are produced by Edelbrock.

Q: What is TVS?
A: TVS stands for Twin Vortices Series. These Eaton superchargers have 4 lobe rotors with 160 degrees of end-to-end twist. The older “M” series superchargers had only 3 lobe rotors with 60 degrees of end-to-end twist. The TVS design allows for greater efficiency, higher pressures, and higher rotational speeds when compared to older “M” series designs.

Q: I need a custom made unit for my project, can Eaton make this?
A: Eaton provides new supercharger services for OEM type customers only. If this is an OEM type request please contact oemsupercharger@eaton.com. Low volume or aftermarket business should be routed through one of the Eaton aftermarket supercharger partner companies.

Q: What supercharger sizes are available to purchase in the aftermarket?
A: Please check with one of the Eaton aftermarket supercharger partner companies.

Q: How often do I need to change the oil in my supercharger?
A: The sealed oil reservoir in a supercharger is designed to last the life of the vehicle. Changing the oil is not recommended unless you suspect contamination, leakage, or other issues like bearing failure. Also, if your vehicle has an abnormally heavy duty cycle, such as racing or towing, you could consider changing the oil at regular intervals such as 20k, 30k, 50k, or 100k miles depending on usage.

Q: I’ve decided I need to change the oil in my supercharger. How do I do this?
A: If you do want to change the oil there is one fill/drain plug on the front face of the front cover. It will probably be an Allen type plug. You will have to suction out the oil using a syringe or other method before replacing with new oil. Fill levels are dependent on application. For aftermarket units, please consult the aftermarket partner company that produced that specific kit. For OEM units, please see the list below or email infosupercharger@eaton.com. New oil can be obtained from any GM or Ford service parts facility, or from one of the Eaton aftermarket supercharger partner companies or remanufacturers. Please make sure you do NOT use any other type of oil, including synthetic motor oils. These will cause failure.
 

OEM Application	Rotor Type	Size	Oil Fill (ml)	Oil Fill (fl oz)
Audi A6/S4	TVS	R1320	155	5.2
BMW / Mini	3-lobe	M45	145 + 40 (rear)	4.9 + 1.4 (rear)
Mercedes M271	3-lobe	M45	135	4.6
Mercedes EVO M111	3-lobe	M45	110	3.7
Mercedes Clutched	3-lobe	M62	110	3.7
Ford	3-lobe	M24	35	1.2
Ford Super Coupe	3-lobe	M90	240	8.1
Ford Shelby GT500	3-lobe hybrid	H122	140	4.7
Ford Harley-Davidson F150	3-lobe	M112	215	7.3
Ford Lightning	3-lobe	M112	215	7.3
Ford Cobra	3-lobe	M112	215	7.3
GM 3800 Series L67	3-lobe	M90	225	7.6
GM 3800 Series L32	3-lobe	M90	205	6.9
GM Cobalt SS LSJ	3-lobe	M62	100	3.4
GM Cadillac LC3 Northstar	3-lobe	M112	215	7.3
GM Cadillac LSA	TVS	R1900	150	5.1
GM Corvette LS9	TVS	R2300	150	5.1
Jaguar AJ33	3-lobe	M112	215	7.3
Jaguar AJ43/44	3-lobe	M112	215	7.3
Jaguar AJ133	TVS	R1900	150	5.1
Nissan	3-lobe	M62	115	3.9
Volkswagen	3-lobe	M24	40	1.4

Q: What about the bearings in the back of the housing? Do I need to grease these?
A: The needle bearings in the housing of an Eaton supercharger are designed to last the life of the vehicle. If you have your unit repaired by an authorized Eaton supercharger remanufacturers, they will be able to replace or grease these needle bearings for you.

Q: My supercharger is broken, how do I repair it?
A: If your vehicle is under factory warranty then the dealership will replace your supercharger. If your vehicle is no longer under warranty please contact one of the Eaton authorized remanufacturers below. If you have an aftermarket supercharger then it is recommended you contact the aftermarket supercharger company that produced it for any repair needs.
 

www.magnusonproducts.com
1-805-642-8833 (California)

http://www.zzperformance.com/
1-616-532-5152 (Michigan)

http://www.stiegemeier.com/home.html
1-636-949-2275 (Missouri)

www.harrop.com.au
+61 3 9474 0900 (Australia)

Q: I want to perform my own supercharger repairs. Can I have the manual and buy the parts from Eaton?
A: Eaton OEM superchargers do not have manuals. It is up to the Eaton aftermarket supercharger partner companies to decide on producing manuals for their products. Eaton does not recommend using other commercially available rebuild kits or non-authorized remanufacturing companies. Eaton does not have any components available for purchase. Please refer to one of the Eaton authorized remanufacturers for further assistance.

Q: There is extra freedom of movement in my pulley / my coupler needs replacing.
A: Please refer to one of the Eaton authorized remanufacturers for assistance.

Q: What is this black plastic object on the side of my supercharger? What is a bypass valve?
A: That object is the bypass valve vacuum actuator. This unit has a vacuum port that connects to the supercharger inlet between the rotors and throttle body. This actuator opens and closes a bypass valve for the supercharger. This valve is open when throttle loads are low and closed when throttle loads are high. With the bypass valve open there is no pressure being created across the supercharger. This allows the supercharger to have an almost negligible parasitic loss in this condition. With the bypass valve closed, all airflow is routed through the supercharger and boost is created in the intake manifold. In some newer applications this actuator is also controlled by a solenoid.

Q: How do I know which size supercharger is right for my application?
A: For OEM applications please contact oemsupercharger@eaton.com to request a sizing prediction. For aftermarket applications please contact infosupercharger@eaton.com for further
assistance.

Q: What is a supercharger “map” and how do I read one?
A: A map is data on the performance characteristics of a supercharger. The map contains various data types such as flow, efficiency, rpm, and pressure ratio. A common efficiency map diagram as viewed on the Eaton website allows a viewer to determine the best operating range (flow, speed, pressure) for a particular supercharger. The elevations refer to thermal efficiencies with higher efficiencies being more desirable. Pressure ratio on the “Y” axis is defined as absolute outlet pressure / absolute inlet pressure. Inlet flow on the “X” axis is volume flow rate in m3/hour with supercharger speed in rpm being displayed in nearly vertical bands across the area of the map.

Q: What’s a Twin-Screw supercharger and how is it different from an Eaton roots type supercharger?
A: All Eaton superchargers use the roots type supercharging principle. The roots supercharger is a positive displacement pump that moves air in pockets from the inlet to the outlet of the supercharger with no internal compression. The supercharger creates “boost” by moving more air into the intake manifold than the engine is utilizing, thus creating higher than atmospheric pressures in the intake manifold. When boost is not desired on an Eaton roots supercharger, the bypass valve allows the supercharger to spin with negligible parasitic loss as there is no internal compression. The Eaton roots supercharger uses 3 lobe (“M”) or 4 lobe (“TVS-R”) meshing rotors that are similar (but reversed) in geometry. The rotors operate at a 1:1 speed ratio.

The Twin-Screw type supercharger is also a positive displacement pump in that it moves a fixed amount of air per revolution. The Twin-Screw uses 2 non-similar screw type rotors that mesh together to compress and move the air pocket axially along the rotors. This internal compression ratio will lead to greater parasitic losses when boost is not required as you cannot turn this compression “off” by simply using a bypass valve. These rotors will have different rates of rotation due to their non-similar geometry and lobe quantity. The rotors of a Twin-Screw will commonly operate at 3:5 and 4:6 speed ratios. This means as the drive rotor spins at 15,000 rpm, the driven rotor will rotate at 25,000 rpm with a ratio of 3:5. This limits the Twin-Screw to lower rpm limits than the roots due to bearing life concerns.

Q: Why choose an Eaton supercharger over an exhaust driven turbocharger?
A: While exhaust gas driven turbochargers have their advantages in thermal efficiency and high pressure ratios, they are not ideal for all applications. Eaton roots superchargers provide better transient response (time to boost at all rpm), better low end torque, flatter torque curves starting from idle, and often better emissions.

Q: …but my turbocharger gives me “free energy” because it uses otherwise wasted exhaust energy!
A: This is a common misconception amongst people today. A turbocharger does indeed use the exhaust gas to be powered but this energy comes at a cost. The engine must provide extra pumping work during the exhaust stroke to provide sufficient energy for the turbocharger. This pumping work is not present in normally aspirated or supercharged engines and causes a parasitic loss on the system comparable to that of a belt driven supercharger.