I found this is being used by the 7th Gen Celica guys and could transfer over to our cars. Read up and tell me what you think. Forced induction guys need not bother with this since you hopefully have a piggyback system already.
What is the CAMCON?
The CAMCON is a piggyback unit made by Power Enterprise, a Japanese company.
As it says in the picture, it is a VVT-i (Variable Valve Timing-intelligent) controller. The VVT-i system on newer Toyota engine is used to adjust intake cam timing to extract additional power and efficiency from the engine. If you would like to read more about how the VVT-i system operates, here is a link to a Toyota technical document about it.
http://users.ameritech.net/trdcelica...xplanation.pdf
How does the CAMCON work?
The CAMCON works by intercepting the signal coming from the engine's camshaft position sensor. This sensor tells the ECU where the camshaft is, and the VVT-i system uses this camshaft position information to set the angle of the camshaft relative to piston motion (called the timing of the camshaft). The CAMCON offsets the signal, causing the ECU to think the camshaft is at an incorrect angle and forcing a correction. Because of this, there is only a certain range over which the CAMCON can adjust the camshaft position, due to the fault tolerance built into the ECU. IF you try to adjust the CAMCON beyond this range, you will go outside the fault tolerance of the ECU and cause a check engine light.
How do I tune the CAMCON?
In order to extract maximum power from the CAMCON, you will need to have your car on a dyno or use the Gtech tuning method described in a different sticky. There is no good way to tune the CAMCON on the street.
You will want to do a number of different runs with the CAMCON set at different settings. For example, you would do your first run with all the settings at -5, the next with all the settings at -4, and so on. At the end, you would overlay all the dyno graphs and figure out which setting made the most power at a given rpm interval. You will then combine all these settings into your final tuned settings.
One thing that should be pointed out is that changes in CAMCON settings have the opposite effect that you might thing. Increasing the number retards the cam while decreasing the number advances the cam. This is the same convention as the Power FC.
The other thing that should be pointed out is that after three or so pulls on a stationary dyno, the engine will begin to heatsoak. On a car where no changes are made, you will see this as a drop in power with each successive run. Since we are concerned with small changes in power from run to run with the CAMCON, you will want to avoid this situation. A suggestion is that after every three pulls, allow the car to sit and cool down for a period of time. Unfortunately, this means possibly eating up expensive dyno time simply sitting idle. One possible solution would be to unhook the car from the dyno, drive it around to return it back to normal operating temperature, then go back and hook it back up. You would have to do this several times to get in enough runs to complete your tuning.
Linear Mode
