Sorry was writing to two different things and got brain crossed. When I get out of these meetings today I will repost

 

yes it is that simple but you can only go up to 4.5k couple of guys are running it here and say they like it

 

PSD Injection timing can be changed with the EOT Mod
The PCM uses the EOT to help determine the injection timing. Cold oil has more advanced timing. Warm oil has less advanced timing. There are several reasons Ford changes the timing as the oil warms-up.

In the past some modifications were tried on the EOT sensor. Most results were not successful.

But this modification is different. In the past the sensor was replaced with a fixed resistor. There was no feedback from the sensor. The engine could be made to run well at only one oil temperature. The changes in engine oil temperature needed to be sensed by the PCM.

The EOT sensor is connected with two wires. Either wire can be cut and spliced with a resistor. The values that have been tried are: (0.5k 1k 1.5k and 4.1k). The 4.1k ohm has the most effect on advancing injection timing. When this resistor is wired in series with the EOT, the PCM is fooled into thinking that the engine oil temperature is lower than actual. Lower engine oil temperature causes an advance in timing.

The advance in timing seems to be good for efficiency. Power is better above 1500rpm. The turbo seems to have a bit more lag and it is now possible to run more injection oil pressure.

In general, new engines are not adjusted for peak power or efficiency. Part of the specifications requires lowering the peak combustion temperature. This is often accomplished by retarding the injection timing when the engine is at the torque peak (2000rpm). An advance (over stock timing) at this rpm is good for both power and efficiency. The test hill showed a 3mph increase in speed.

The increase in turbo lag seems to be caused by reduced heat in the exhaust manifold. Turbochargers work on waste heat in the exhaust gasses. Less waste heat is good for efficiency and this modification leaves less heat in the exhaust to run the turbo on the test vehicle.

One last comment, when the injection oil pressure is increased, the injectors are harder to open. Harder to open injectors will take longer to open. In the past, this effect has limited the injection oil pressure to about 3000psi on the test vehicle. Some people also reported that their engine towed better at higher rpm without an increase in injection oil pressure (without a 10k resistor). The advanced timing of this modification has allowed the injection oil pressure to be increased on the test vehicle. Haven't had time to gauge the increase but the injectors are working better at high rpm and load.

Hope some of this info clears up what I got mixed in my mind in the other post.

 

If you want a step by step of how to do this mod, let me know, and I will supply one.

 

i guess any more would probably cause it to throw a code. and i would think that there is ceiling as to how much affect the eot has on timing.

 

Looks like Todd beat me to it. Here's the link:

http://pages.prodigy.net/stevebaz/_i...az/index3.html

It's about halfway down the page. Do a "Find" on "timing" and it'll take you to the info.

 

I would too, but I am not sure where it is. I would like to find it though...LOL

 

yeah, I want a write up and what mod is it called?

 

See above from steve baz

 

i never saw that on baz's page before, nice to know, guess i should read more thoroughly

 

If you have an idea of what you're looking for, "Ctrl-F" is a wonderful tool.