MIVEC and high boost
Just remember when overlap adds power other than part throttle, which is usually at peak boost for our turbo when turbine psi is lower than intake, your airflow reading should be higher than the unit referred to for combustion (or pwr). Scavaging will also make the O2 read higher too.
OT. what lsb or msb math do you guys use for 2 byte? MY 2byte air is fairly different than the actual hz logs I get in LW with the sensor interface.
OT. what lsb or msb math do you guys use for 2 byte? MY 2byte air is fairly different than the actual hz logs I get in LW with the sensor interface.
So i have been discussing this topic with a buddy of mine. He is a well experience Subaru tuner. He has been tuning cam timing for a while and here are just some of his thoughts:
nope. the subaru guys make the same mistake. airflow is only a potential of power. you may have high airflow, but you can't support the timing/AFRs to make it work, so by lowering airflow and adjusting the other parameters, you will be better off.
people have also tried to use boost levels as well. if you keep the duty cycle constant, you can see how adjusting the cam timing will affect boost levels. less boost = higher VE of the motor = teh win. again, you may not be able to adjust the other parameters after a certain point. you can see when you have to pull out a lot of timing to keep the car from knocking and that means you've adjusted the cam too far.
can you log cam timing yet or is it just what's programmed? that could also be a problem.......
people have also tried to use boost levels as well. if you keep the duty cycle constant, you can see how adjusting the cam timing will affect boost levels. less boost = higher VE of the motor = teh win. again, you may not be able to adjust the other parameters after a certain point. you can see when you have to pull out a lot of timing to keep the car from knocking and that means you've adjusted the cam too far.
can you log cam timing yet or is it just what's programmed? that could also be a problem.......
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Joined: Oct 2008
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From: usa
You may be able to log cam timing using the crank and cam angle sensors with LW using SSI-4 (sensor interface). I know for sure you can set up and log direct ignition angle with this (non OBDII) and I assume cam advance too, might be fairly in depth though.
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