PSRU for Eggenfellner Subaru Replacement
or Retrofit
Gearbox with Centrifugal Clutch
and Flywheel Assembly
The Geared Drives 200Z Zero Offset PSRU for Subaru was developed as a replacement gearbox for Eggenfellner Subaru 4 and 6 cylinder engines. This gearbox has all of the same features of our original BW-350 PSRU, including the centrifugal clutch and flywheel assembly. With this new PSRU, Subaru engine owners no longer have to tolerate the torsional vibrations that many have considered "normal". Smooth and quiet of operation, the double reduction gearbox offers over a dozen different gear ratio choices. Gear ratios are easily changeable by returning the gearbox to Geared Drives with your ratio choice. Charges for gear ratio changeout are approximately $900. Please consult with us if you have any doubt on the best ratio for your engine.
"No harmonics"
"Better fuel burn with cruise speed at lower prop setting"
"Starting is much nicer, and stopping now does not have the death shudder!"
"Temperatures for oil, water and GB much lower"
"Because it’s now so quiet I guess we can hear all sorts of things – it’s
nice not to have the harmonic!"
"No vibration felt on the airframe as you can touch the dash and its smooth"
"Much fun and sooo smooth"
"No rum rum rum harmonic"
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Lee Apaka graciously allowed us to use photos (above) of his beautiful RV7
flying the Geared Drives 200Z PSRU on his H6 Subaru Boxer engine, and sporting some fantastic new radiators by Ed Klepeis of Tech Welding in Paducah, KY. Lee reports fantastic engine cooling using this radiator and cowl configuration.
Check out this youtube video of Lee in his airplane in the skies over California: http://www.youtube.com/watch?v=jrhR2usInbY&feature=youtube_gdata_player
Installation
To see a pdf documentory of Lee's experiences as he replaces the Eggenfellner Gen III gearbox with the Geared Drives 200Z PSRU click here...it is 47 pages long so be patient and give it time to open up.Click here to view the Installation Manual for the 200Z PSRU
If you would like to know more about how to improve Subaru engine cooling log on to http://www.techwelding.com/index.html or call Ed Klepeis at 270-898-3776.
Please feel free to call us at (936) 827-5126 if you have any questions or comments, or email Bud@GearedDrives.com.
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| Click here to see the 200Z Geared Drives Zero Offset Gearbox being test run on Frankenstein, our test mule. We are running it with a 72" Hartzell two blade hydraulic prop on a 350 Chevrolet engine under full load at full pitch. After 8 hours running non-stop, you can wrap your hand around the oil filter and it is barely more than body temperature to the touch. | The gearbox bolts on via an adapter plate. Your starter remains in its current location under most circumstances. Gearbox can be used with our without the Eggenfellner front engine mounting plate. (Front engine mounting plate not included, shown below for clarity) |
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Geared Drives 200Z PSRU for Subaru
| Horsepower | 150-250 HP |
| Engine Applications | Subaru 4 & 6 cyl, adaptable to others requiring zero offset from prop flange centerline to crankshaft centerline via engine mounting plate |
| PSRU Weight | 2 lbs lighter than Egg Gen III at 54 lbs |
| Prop Flange to Block Face | Same as Eggenfellner |
| Prop shaft to crankshaft centerline | Zero inches |
| Reduction Ration | Over a dozen possible, engine specific, please inquire |
| Prop Flange | All popular bolt patterns |
| Lubrication | Completely self contained, force fed by dedicated oil pump and filtration system |
| Gear type | Straight cut spur gears |
| Prop rotation | Conventional or counter rotational |
| Clutch and Flywheel Assembly | Included |
| Clutch type | Dry, centrifugal, dampens harmonics |
| Delivery | 90-120 days typical, call for lead times |
| Price | $5,995 plus crating & shipping |
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