What do you use with ur SAFC II?

[Dawgz]

So i was reading a thread where Gadget was working on JoeB's car and he was mentioning "High Gear/Low RPM-Ping problem"

Our approach of using the proper size main injectors has many benefits. First we can properly fuel the engine in all conditions from idle to WOT and full RPM. Second there is a cause and effect of the larger injectors that makes the engine run better.

To dial in the injectors we use the FTC to pull the MAF signal back to get the proper fuel ratios. The ECU interprets this as a decrease in engine load. This makes it want to run a more aggressive ignition timing. Timing makes power. Now here is the cool thing that Toyota does that we benefit from. Our engines are mechanically noisy compared to other engines out there with the solid lifters and everything else. Because of this the ECU has a hard time of figuring out what is knock and what is not below 3000 RPM so it dose not use the knock sensors to adjust timing below 3000 RPM. It uses an extrapolation of the high RPM timing to set up the low RPM timing.

Now with the stock supercharger on the stock fuel system it will lean out on the top end. This causes knock and the ECU pulls out a lot of timing on the top end. This intern causes a reduction in low RPM timing whether is it needed or not. Now when we properly fuel the top end, the timing is run more advanced from knock reduction, and with the addition of the timing from the interpretation of reduced load on the engine, again the timing ends up more advanced in NON boost conditions. Most everyone reports a peppier engine in non-boost and many repport more MPG in cruise.

The down side to this is a more pronounced High Gear/Low RPM-Ping problem. I know on the 3.4 when people increase fuel delivery on the top they get more pining in low boost below 3000 RPM when the knock sensors are not used. This is where our timing controller comes in. We pull out just enough timing in that low boost low RPM range to suppress the HG/LR-Ping so you never get the HG/LR-Ping problem.

So, i emailed him to talk more about this, but i wanted to know if anyone has addressed this issue with their car, and if they used a URD product or something else.

I want to look into this as ive been thinking lately how the SAFCII does tune for WOT more than just regular driving, maybe im making this more complicated than it should be / is.

[trd4life]

the camry solaras dont seem to have that pinging problem that he is referring too Dawgz, but nonetheless a timing controller is never going to hurt!