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The only spur gear PSRU with
centrifugal clutch		 Geared Drives
10150 Dorbandt
Conroe, Texas 77303
(936) 827-5126

email Bud@GearedDrives.com
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The Geared Drives LS Series Firewall Forward Package for RV-10

All aluminum water cooled Chevrolet engine with altitude compensating electronic fuel injection.  Spur gear propeller speed reduction unit with fully automatic centrifugal clutch. Custom programmed ECM and wiring harness. Cowling modification kit included. Ships already assembled and test run for bolt-on application to RV-10 firewall. 
Does not include prop governor, prop, or fuel pumps.
Photos can be seen on the projects page
See chart at the bottom of this page for engine to prop RPM data

Price                                                                                                         $29,900
Additional LS Series engines available upon request.
Inquire for price and availability.
Fuel:                                                          100LL or Premium Unleaded
Wet weight with all accessories:               488 lbs
Output                                                        350 HP at 4800 RPM
Torque to prop                                           546 to 602 ft lbs @ 4000 RPM
Delivery                                                      120 days from receipt of deposit
Deposit required:                                        50%
Highlights of the Firewall Forward Package for RV-10 :
 5.7L LS1 V8 Chevrolet Engine
     standard engine 		INCLUDED
Electronic Fuel Injection INCLUDED
Electronic Ignition INCLUDED
Alternator, 105 amp, standard INCLUDED
Lightweight Racing starter            INCLUDED
Cooling System-
     Three pass aluminum radiator, baffling, overflow tank		 INCLUDED
Engine Oil cooler INCLUDED
Ceramic Coated Exhaust System               INCLUDED
Custom Ceramic Coated Headers and exhaust INCLUDED
Engine Mount-black powder coated            INCLUDED
Modification Kit for stock RV-10 cowling               INCLUDED
Geared Drives PSRU
     1.562:1 or 1.72:1 ratio options 		INCLUDED
Centrifugal Clutch Assembly INCLUDED
PSRU High Pressure Oiling System with Filter INCLUDED
Assembly INCLUDED
Test Run prior to shipping INCLUDED

Geared Drives PSRU with LS1
PSRU Ratio vs. Prop RPM and Torque to Prop
Assuming 80% prop efficiency at 2500 Prop RPM

Notice that torque begins to drop off after 4000 Engine RPM
Run the engine slower and get more power to the prop.
Save fuel but don't sacrifice performance.

Engine RPM Prop RPM at 1.562:1 Ft/Lbs Torque to Prop Prop RPM at 1.72:1 Ft/Lbs Torque to Prop HP
2500 1601 545 1453 610 160
2700 1729 555 1570 618 176
2900 1857 560 1686 625 190
3100 1985 561 1802 625 206
3300 2113 562 1919 625 223
3500 2241 564 2035 626 235
3700 2369 565 2151 626 255
3900 2497 563 2267 629 280
4100 2624 561 2383 627 300
4300 2753 555 2500 619 325
4500 2881 545 2616 612 335