Engine Performance Graphs.

Epicycle test their engines on either Dynojet or Dyno Dynamics Eddy Current rolling road dyno's.
All engines are tested in the chassis so that all the accessories used are those normally used with the motorcycle, therefore engines tested in this way duplicate, as closely as possible, the conditions found riding on the road.
Our Dynojet test facility incorporates a large computer controlled fan & ducting system that regulates the outlet air speed to match that of the rear wheel speed. This way the airbox pressures found on the dyno match the pressures encountered on the road and therefore the power figures derived will exactly match the power delivered to the rear wheel on the road. Fuel mixtures set this way on the dyno will now NOT change when you blast out on to the road.
 
Our power figures may indicate a 1-2 % higher than dynos that use fans no bigger than a hair dryer, but we measure the true power of your engine, the way you ride it.

The Ducati power figures represented below were generated from bikes that were modified & tuned by the Epicycle workshops. We cannot guarantee to reproduce the exact figures as generated by our test bikes, but would expect the before & after differences to be relatively accurate. It is therefore recommended that you dyno test your bike before & after modification to verify the results. Always use the same dyno as different dynos can produce varied results.

Interactive Dynomometer Graph.
Below is an interactive engine performance graph that allows you to overlay any of our test graphs giving direct comparisons.
Select a bike from the drop down boxes & then click the "Add bike" button. Below the graph will appear the description of the chosen bikes. Clicking on the description will delete that chosen bike.

Thanks to Wayne Macdonald for this dyno graph.  http://www.hutch.com.au/~wmcdonal

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Ducati 996 SPS.
All the SPS graphs in the interactive dyno chart were taken using an 1998 model 916 SPS.
We refer to it as an 996 SPS as  that is it's actual engine capacity.
The engine was standard in every respect other than the modifications listed below.

For comparison purposes bring all three 996 SPS graphs up onto the interactive chart.


Graph 1.    This upper graph is from an Epicycle modified SPS that is fitted with the EM4                       programmable computer,  54mm throttle conversion and revised camshaft timing. 

Graph 2.   This middle graph is from the same bike with the EM4 programmable computer & revised                       camshaft  timing only.

Graph 3 .  This third graph is from the same bike prior to any modifications.

Listed below is the power increases  between the standard bike & the fully modified one. All tests                     were performed on the same dyno on the same day.

5000 rpm        26%                8000 rpm        12%
6000 rpm        24%                9000 rpm        10%
7000 rpm        21%               10000 rpm       4.5%

This represents an average increase in  HP of 16%

Back to interactive graph.

Ducati 916 SP.
All the SP graphs in the interactive dyno chart were taken using an 1995 model 916 SP.
The engine was standard in every respect other than the modifications listed below.

For comparison purposes bring all three 916 SP & the 955 SP graphs up onto the interactive chart.

Graph 1.   This uppermost graph is from an 916 SP that has been fitted with a 955cc big bore kit,                      52mm Termignoni exhaust system, Sportivo cams & EM4 programmable computer.

Graph 2.   This second highest graph is from the same 916 SP before the big bores & cams but                       fitted with the EM4 computer & 52mm pipes.

Graph 3.   This next graph down is from the same bike prior to fitting the EM4 programmable                      computer. It retains the OEM Weber computer fitted with an aftermarket chip although not                      tuned for the larger pipes.

Graph 4.   This lowest graph is from the standard 916 SP with no modifications.

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