Camshaft Design Program.

Latest version:    1.8.8      3/12-17

Corrected 1.8.8:
Rocker ratio influence on max. velocity line in Design page implemented, Valve spring page better explained and step sizes improved.

Corrected 1.8.6:
Can draw Roller Cam shape.
Able to use Comparison Cam 1 data to display overlayed Cam shape to visualize what the new Basecircle must be to create the new profile.
Corrected 1.8.4:
Cam shape drawing now correct.
 Load .cam files error fixed.
 Duration calc error with Inch setting fixed.

download demo    Click to download the Demo version ( 1.6.0 ).

       Click to download  the Pdf  instructions.

Or click the PayPal button to buy the full version for 99.- €  EURO

The version that includes the Cam measuring machine controls and schematics for it etc.
costs 199.-  €  EURO

On recieving your order, the Software will be compiled with your Company name on the start Page
and the download link will be mailed to the email address you have used on PayPal to pay for the order.
There is 12 months of free updates included.

Short overview.

Start Page:
The program is able to work in both mm and inches.
iIt uses Splines to generate the lift curve, with this approach it is fairly easy to copy any
measured Cam lift curve and then modify it.

Splines aren’t as limited as the more common Polynomial curve approach and with Splines it’s easy to
design an asymmetric lift profile. With the adjustable 2 stage smoothing function it’s also easy to get
low Jerk values without compromising the lift curve.

Design Page:

Design Report Page:

Flat tappet with design Cam shown inside the old Cam with larger basecircle.

oller Cam with design Cam shown inside the old Cam with larger basecircle.

Duration etc. Calc for up to 4 Cams:
Change the centerline and calculate directly the changes in opening, closing degrees, lift
at TDC and eg. 10 deg. before/after TDC etc.

Compare Curves for up to 4 Cams at the same time:

Comparison Cam nr. 1 ( 2 and 3 ):
This Page takes its input from the lift data in mm/inch with 1 ,2, 4 or 5 degree steps data in the left Window.
For Hand measured Cams there is the option to smooth the generated lift-velocity-accelleration and jerk data.

Cam report Page:
Generates Cam report and/or a Cam Card with specs.

Static Valve Spring Force Calculating Page:

Fast Fourier Tranformation analysis:

Cam explorer Page, only active in the 199 $ version:
Interface to the Cam measuring machine electronics .

A complete reference to parts needed from eg. Ebay is supplied, as well as full schematics
to the wiring and firmware for the Arduino Uno board that controls the Steppermotor/Driver and the
Mitutoyo indicator.
Excluding the Mitutoyo indicator and its SPC cable, the price of parts from Ebay adds up
to just under 400 $ (December 2014)..

An example of a Cam measuring Machine made from the referenced parts ( + an aluminium
profile cut and milled, not supplied ) :

Under development.

Piston movement:
Shows Valve, Piston position, velocity and accelleration per degree.

An example of what we have done with this program even in its early stages in 2013:

Dyno comparison of a HRC cbr600 exhaust cam (blue) and the improved version we made (red).

If you compare it to the picture below with an older comparison on a similarly prepared engine of the same hrc exhaust cam and
the commonly used in SuperSport WC 1270 grind from England, its clear that the 6 deg longer duration of the 1270 grind lifts
topend power but causes powerloss from the midrange and down, still this was preferred by many teams just to get a single hp
more from 12.000 up.

Our approach was to increase the duration only 4 degrees and use an assymetric lift curve with same closing flank as Hrc
but a slightly more aggresive opening flank (the 1270 actually had milder flanks since it probably  was only a stretced out Hrc
profile not a completely redesigned profile).

Dyno comparison of an HRC cbr600 exhaust cam (red) and a 1270 UK grind (green).