MAF tracking

[Razor]

This is something new.. Its neat to see the results.

This is on a C6 Corvete with an E-force Supercharger(roots). Notice the Guage increase on pressure as the motor increases on RPM's although boost sames the same. leaves a nice flat AFR line. This was done at the Tuning school two weeks ago. The car without methanol made 505 rwhp at 10 PSI and 10 degree's timing. On Methanol it ended up making 606 RWHP at 18 degree's timing. This was on an automatic using a Mustang Dyno. Stock bottom end car, injectors at 97% DC, headers and a blower. twin nozzle kit for additional fueling.

Havent done this on a GN yet.. even though the principle is the same as most Buicks now use the LS1 style MAF's.

MAF tracking - YouTube

 

[aminga]

Where would you pull the MAF signal

 

[TurboTnZ06]

So instead of referencing boost for controlling alky pressure, use the maf signal? I'm running the TT 6.1 chip which locks to a target A/F based on the wideband and ignores the MAF at WOT, could alky switch over to the injector signals to reference since the ECM is trying to figure it out already?

 

[Razor]

Where would you pull the MAF signal

It's a little box that attaches to the pink, yellow, and black wires on the airflow sensors wires.

I'll post pics latter.

 

[Razor]

So instead of referencing boost for controlling alky pressure, use the maf signal? I'm running the TT 6.1 chip which locks to a target A/F based on the wideband and ignores the MAF at WOT, could alky switch over to the injector signals to reference since the ECM is trying to figure it out already?

The chip ignores the MAF but the signal is still there. The theory is as the load(air) increases so does the methanol. Making the system work even smoother than it does.
In lower gears where load is not as high it would spray less.
Testing on a Buick needs to be done, don't know I'd start with a 10 sec car initially

I wouldn't do this with a stock MAF car as the sensor pins at 14 psi. But on an LS1 or Z06 card style sensor the theory is there

 

[TurboBob]

Most turbo cars don't really need the MAF or RPM reference in my (limited) experience, the blower cars (especially centrifugal) do.

With a turbo car, with "streetable" size turbos, you are usually running above the torque peak, and the airflow seems to level off. So MAF referencing would work, but may not improve performance that much.

You also have to look out for MAF reversion when you drop the throttle, so ensure there is a throttle based enabling input.

Snow Performance has been doing these kinds of controls for a while, and the ISAC has the capability as well.

But, if you do any testing Julio, I'd love to review the data.

Bob