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FT86 offset cam

MoTeC M1 Software Tutorial

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Hello can anyone verify me on this or corect me if im wrong.

So to set the inlet offset is to retard the cam to most retard degree like -10 then adjust the ofset until it read -1 ?

By doing this.. then my 0 is more like -9...

And exhaust is the most advance.

What rpm i should do this calibration? Cos 800 might not be able or enough to drive the cam right ?

2000 rpm enough ?

Please clarify. Thanks

And please re educate me again how to achieve the correct cam offset.

Because i am having my inlet cam 1 positions flutters and suddenly goes to minus 30 and engine is stall then dies.

It happens when engine is hot.

I will make another thread with the datalogs and screenshots.

Note the car is 2013. I am using v5

I will try to use the v3 back

Bump bump

The offset is designed to account for minor variations from engine to engine on the exact cam position. You can set this by disabling cam control (set PID gains to zero or unplug the actuator) and adjust the offset until the cam position on the inlet measures 0. The inlet cam on the 86 has a natural resting position of 0 deg and can be advanced about 50 degrees (from memory) and retarded 10 degrees.

The flutter you're seeing looks like it's an issue with the PID control settings. The fact that you're seeing a cam position difference from bank to bank may also indicate that there's an issue with your feed forward values bank to bank. I'd suggest optimising your settings and seeing if you can get an improvement. I've tuned several FA20s on the M1 and I've seen the need for some quite significant variations in PID gains from one to the other, particularly if a heavier weight oil is used. If you have access to our Variable Cam Control course then there's a module that covers the process in it on the ECU Master ECU but the process on M1 is basically identical.

ok thanks that is a confirmation to me

so let me get my offset to zero first,, i need to make the target aim to zero too right

i will check through the rpm up untill 2000

after that which one i go first

feed forward first then pdi right?

min 0 max 100 on duty cycle is good ? or 10 to 90?

ok i will buy your new variable cam

i just need to see wether this cam source is going to help me or not

thanks again andre

Is there anyone here ?

Read the help for Inlet Camshaft Bank 1, that is all the information that is available.

According to that:

If the camshaft is in rest position, "Position" should provide a value of zero. This can be achieved by setting "Position Offset". The correct value can be determined when the engine rotation produces a "Position" value with the actuator control being disabled.

So -- you do NOT need to adjust your target aim to zero. You should probably confirm that the position remains constant and zero when the actuator is disconnected at all RPMs. If not, you have a mechanical issue with your engine (timing chains, tensioner, phaser, etc) that needs to be resolved.

Next you make sure the actuator settings are correct (see help for the detailed list).

Then you work on the Control Feed Forward to find the values that can hold the cam position steady. With the engine running you increase the value until the cam starts to move in one direction. Then decrease until it moves in the other direction. Iterate until you find a value that holds the cam in one postion.

Then you follow the process in the help to tune the PID, by changing the AIM and observing what happens.

Thanks david as usual.. best.. thats confirming