Dyno results
Horsepower, torque and efficiency increases resulting from changes made to the stock factory diesel or a high output diesel, as modified later, depend on many variables. When installing a new device on your engine, you need to know what you are getting!!!
The attempt to separate air from fuel or other liquids has been going on for over 100 years by individuals and large corporations from around the world, none were successful until the Fuel Preporator. The original Fuel Preporator was put on the commercial market in 1994 and has gone through a number of design changes and improvements. The original model was designed for the class 8 over the road truck engines. It did what it was designed to do very successfully, but it was large and bulky. That was ok for the Big trucks, but not for small applications such as pick up trucks. The original Fuel Preporator also had its limit as to flow and air separation.
Watching a modern jet airliner fly may make flight appear simple. However, as we all know, it is not. Air separation from liquids is neither easy nor simple and depends on a number of technical design issues.
Entrained air, a product of fuel sloshing in the tank and carried in with the fuel; and fuel vapor, produced by vaporization through fuel pump cavitation, being compressible is the source of lost power, low torque, increased fuel consumption and increased exhaust emissions of the diesel engine. The degradation of performance of the diesel engine as it leaves the factory or test cell and is put to use under real world operating conditions is a result of using the inadequate vacuum feed fuel supply system.
To achieve an increase in torque and horse power output from the diesel engine and restore the engine to the designed performance level, requires eliminating the problem at it's source. Remove the vacuum feed filtration system and replace it with the proper system!
A fuel filtration/delivery device may remove air and maintain a positive pressure flow. However, if it is inadequate to remove air/vapor at the higher flow rate or as the filter begins to plug, it may quite possibly cease to function as intended and may pass excessive air/vapor to the engine. Should this happen, a loss of horsepower and torque will result and the device then becomes just a fancy, expensive fuel pump! Additionally, this quote from the Milwaukee School of Engineering, might make one cautious, "probably the most destructive fluid contaminant is 'air'. It causes severe cavitation and can destroy a pump in a matter of minutes. "
The new Fuel Preporator Model 135-A, (A for advanced technology) has features that enable it to be built very small and still separate air from the fuel at extremely high flows and pressures. The Fuel Preporator models for the Alco and EMD locomotive and marine engines up to 20 cylinders (12,900 cu. in. plus) and 6,000 or more horsepower, have filters about the same size as the original Fuel Preporator.
The difference is that the Original Fuel Preporator would only separate air/vapor from fuel at flows to 165 gph. The new Advanced design Fuel Preporator for the locomotive and marine engines separates air from fuel at flow rates of 450/650 gph or more and maintains a much higher pressure. We did not alter blue prints to some one else's patented product to do this.
Fuel Preporator is an ISO-9001 Quality Manufactured and Tested product.
About Dyno Tests: Tests performed by the University of West Virginia Emission and Engine Lab confirm that after installing the Fuel Preporator on the engine (test engine was a 3306 Cat) that torque rise off idle was increased 103% to 106% and at peak it was increased by about 6%. Additionally, torque did not fall off at the higher rpm's. Tests on 4,000hp EMD marine engines (twin engine powered tugs) show a significant reduction in fuel consumption and a backing off of the 'rack' on the engine equipped with the Fuel Preporator running next to the other engine with a standard fuel filtration system. NOTE: Wheel or propeller speed of both engines was maintained equal. Press releases will soon be issued.
Fuel Preporator is the REAL DEAL! It should not be assumed that other systems, because they may have a similar appearance or that they claim to do the same thing, actually perform the same!
Again, thanks for your time,
Charles L. Ekstam, Inventor of the Fuel Preporator
Edited by Steve St. Laurent to remove references to competitors
Attention: TDR Forum Junkies 
if low voltage is the problem i will put in a relay to supply battery voltage to the fass like c-hawk suggested
just a thought for those more intelligent than i if a stock truck was to have low voltage at the l/p could that be causing some of the premature failures?
