PCMtec

[Midwestracer]

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[engineermike]

Couple more bits of info, cool things about PCMTec....

I was struggling to tune my TB curve and attempting to log SIP (TOP) (TB downstream pressure). Nothing seemed to be working right, when I remembered that PCMTec has PID/MID numbers in some of the axis values in the tables:

If you're trying to figure out what it's using to look up data, there it is. You can then just plug that MID number into the logger and know exactly what data the logic is using in the lookup table. Sure enough, the data from that MID wasn't what I had been attempting to use to calibrate the table.

On another note, the gen3 PFI injection window for some reason doesn't allow you go get past about 75% duty cycle. I haven't been able to overcome this so far (and the outlook isn't good), but I did happen to find a parameter auF61009 "switch to allow variable PFI window sizing". When turned on, this adds about 2 ms to the max duty cycle at 7500 rpm. I found that my Whipple cal had it turned on as a default, but stock and Roush had it off. This parameter is not defined in HPT.

 

[shogun32]

for some reason doesn't allow you go get past about 75% duty cycle.

Hard coded limit based on somebody assumption there was no NA state that could possibly need it? Or side effects of some crappy OEM injector (eg Gen2) that can't handle more?

 

[engineermike]

Hard coded limit based on somebody assumption there was no NA state that could possibly need it? Or side effects of some crappy OEM injector (eg Gen2) that can't handle more?

By all accounts (not my personal experience), it didn't occur in the Gen2 and you could go to 100% duty cycle (Ford calls it 200% since it's 2 full revolutions).

There's a thread on hpt about it and Eric Brooks claims it's a hard-coded no-go zone in the cycle and will require a patch to overcome. It appears to have shown up when Ford adopted a bunch of Bosch coding in 2018 (Bosch now supplies Ford with large chunks of logic regarding GDI, PFI, and I believe knock sensing as well). I wasn't happy with that answer so I've been trying all sorts of stuff to get around it....but so far no luck. I was able to get to 13 ms out of a possible 16 (80% dc) through various changes and have basically only one thing left to try.

That said, I'm using a single DW400 pump and 55# injectors and had to command .70 lambda and cut the GDI system short just to force it into the PFI limit on the Whipple 3.25 pulley on E85...just to even test the changes. I could just put the GDI back to normal and command a normal lambda and I'd be covered with this pulley, which isn't what all the big shops tell you.

 

[shogun32]

There's probably some guy in Germany sitting at his desk saying, "ze inject'a ze gut to funf un zeven' and stabbing a pen at a 3 inch, er 70mm thick tome of Bosche specs last published in 1987.

 

[Rolls]

On another note, the gen3 PFI injection window for some reason doesn't allow you go get past about 75% duty cycle. I haven't been able to overcome this so far (and the outlook isn't good), but I did happen to find a parameter auF61009 "switch to allow variable PFI window sizing". When turned on, this adds about 2 ms to the max duty cycle at 7500 rpm. I found that my Whipple cal had it turned on as a default, but stock and Roush had it off. This parameter is not defined in HPT.

Mike can you post me the MID that pegs at 75% ?

I'm sure we can overcome it, likely it is to prevent burning out a solenoid or prevent some other kind of mechanical failure, but that is up to you if you want to play with it.

 

[Rolls]

Couple more bits of info, cool things about PCMTec....

I was struggling to tune my TB curve and attempting to log SIP (TOP) (TB downstream pressure). Nothing seemed to be working right, when I remembered that PCMTec has PID/MID numbers in some of the axis values in the tables:
If you're trying to figure out what it's using to look up data, there it is. You can then just plug that MID number into the logger and know exactly what data the logic is using in the lookup table. Sure enough, the data from that MID wasn't what I had been attempting to use to calibrate the table.

On another note, the gen3 PFI injection window for some reason doesn't allow you go get past about 75% duty cycle. I haven't been able to overcome this so far (and the outlook isn't good), but I did happen to find a parameter auF61009 "switch to allow variable PFI window sizing". When turned on, this adds about 2 ms to the max duty cycle at 7500 rpm. I found that my Whipple cal had it turned on as a default, but stock and Roush had it off. This parameter is not defined in HPT.

Probably the most underused feature in our software yet one of the most useful!

You should try "Find related parameters" in the right click menu on the navigator for more magic. I would like to add assembly XRefs to this as well one day to help assist finding related items.

 

[K4fxd]

You should try "Find related parameters" in the right click menu on the navigator for more magic.

I don't know what I' doing wrong but I don't seem to have this feature. I have the latest version.

Screenshot of right click from the nav menu I right clicked on Fuel

 

[Rolls]

May only be in certain versions of 3.10 or 3.20

Get the latest build of 3.10 and make sure you are right clicking in the navigator on the right

 

[engineermike]

That's a pretty neat tool and will come in very handy. Can't wait to try it out on other stuff. On the issue at hand, here's what it picked up:

I've experimented with everything highlighted yellow and managed to only figure out how to reduce the PFI window, not the other way around.

If we can get this solved (without patches), I think it would open up the Gen3 to much greater power levels on small port injectors like 47's, 52's, or 55's. I'm talking about 900+ rwhp on 52 lb whipple-supplied injectors.

 

[K4fxd]

Right clicking does not give me that option

 

[Rolls]

That's a pretty neat tool and will come in very handy. Can't wait to try it out on other stuff. On the issue at hand, here's what it picked up:

I've experimented with everything highlighted yellow and managed to only figure out how to reduce the PFI window, not the other way around.

If we can get this solved (without patches), I think it would open up the Gen3 to much greater power levels on small port injectors like 47's, 52's, or 55's. I'm talking about 900+ rwhp on 52 lb whipple-supplied injectors.

I've asked an ex Ford Calibrator who knows people from Bosch about this, there is a good reason for it apparently. If I get a good answer I'll let you know.

 

[Rolls]

Right clicking does not give me that option

We will look into this for you. With things like this if you can send in a support ticket that will make sure it goes to the right person the fastest. Otherwise it often gets lost in a sea of thousands of messages we get.

 

[Rolls]

You are using a version from Feburary, there has been numerous updates since then. Please download the latest version from www.pcmtec.com/downloads and you will get the new feature (and some other backend improvements).

 

[K4fxd]

I downloaded this version from the website the same day I posted this. I'll try again.

@Rolls

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