Price: $17,995.00

Propeller Speed Reduction Units (PSRU's) are also part of the Firewall Forward product line. The CAMDRIVE 500+ PSRU, is designed to handle up to 700 hp.

The design and and build up of this unit is the result of years of hands on experience dealing with PSRU's by both Butler and Wilson. Bell Housings are designed to fit the Chevrolet V-8 blocks being used by many builders of the Fighter Escort Wings Mustang, Lancair IV and IVP, Express, Piaggio, replica warbirds, and others.

This gearbox, when matched to a GM engine, is an economical re-engine solution for owner operated and experimental category agricultural spray planes currently using 0-470 and IO520 engines. The fuel savings by using MOGAS instead of AVGAS makes conversion payback in months instead of years. Engine overhaul costs are a fraction of Continental and Lycoming engines. Firewall forward weights are within a few pounds. Some cowl mods may be necessary. Air conditioning is easily added. Contact us for information on complete firewall forward packages.

- some parts are still available for older CAMDRIVE 500 PSRU's. Note: Some parts are not interchangeable due to closer tolerances. Contact us for details.


Height17.25 in.
Width9.25 in.
Length16.5 in.
Ratios1.78:1, 2.21:1**
Weight87 lbs.*
Offset9 in.
Total weight109 pounds (Includes PSRU, PTO, Governor Drive, Bell Housing, Belt, Coupler, all bolts, nuts, washers, and fittings, Prop Flange and Nut)
*  approximate weight depending on accessories   


The CAMDRIVE 500+ Propeller Speed Reduction Unit is a key part of the power train for the Fighter Escort Wing's Mustang.


9-inch offset 2.18:1 ratio


6-inch offset 2.18:1 ratio


1.78;1 or 2.48:1 ratio


Governor mount, drive assembly, sprocket and belt


Power take-off assembly, gearset, sprocket, shaft, and side guard


Failsafe torque coupling


Machined flywheel spacer

$295.00 - $995.00

Custom cast and machined bell housing adaptor (fits all Chevy small block V8 engines and others)


Forged M1 billet bell housing for extra strength 


Engine oil conversion (saves 17 pounds of weight)


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