Rudy 34

Nice pics !! Have you tried it on some PFC ?

FastHatch

Only on a Honda yet, i will need testers for the other models.



Some PFC's also have more settings than what FC Datalogit displays.

Rudy 34

Should be able to do some tests on subaru and perhaps also on mitsu. Let me know

Rudy 34

Do you have any news ? Some beta software release ?

Maximum

iTrader: (5)

I just came across this thread and it's very interesting stuff. Looks like a lot of good work. Any updates? I'd be willing to test a bit on my rx7 this summer.

FastHatch

I'm still working on the software and also some additional Hardware for the PFC. I've hoped that some people would help me, but it seems like everyone just have a "big mouth", nobody ever helped me.

Same thing with "subyfiles" here on the board, offered help but then never replied to a PM anymore.

Seems like people are just looking to get the software for free.

I understand 99% of the packets and settings as for now and FC Tune can also open and save FC Pro (Power Excel software) data and log files.

But i still need a short description for a lot of settings. I have only experience with Hondas so far, but not with rotary engines or automatic trannys.

I'm a little disappointed that there aren't any PFC users who would like to help.

It would be great if someone could write a short description for these settings:

- Oil Metering Pump, what does the correction value do?
- Fan, does the RX7 have 2 fans or is "Fan 1 / 2" like Low and High?
- The Injectors have 2 transition values, one is labled 10'90" (whatever that means???) and there is a second transition value in mS.
- Sequential Turbo (TPS, Hys Hi, Hys Lo), how does it work?
- Air Flow Warning, why is that necessary?
- o2 Feedback, is that the Target AF, or the value where it goes into open loop if the value of current cell in the fuel correction map is above that value??
- Boost control has a "Normal Solenoid Duty", what does that mean?

Jdot

I don't know about any of the pre 93 Rx7's, But the FD has Two fans on the rad. The fans have three speeds as well.

Quote from

http://www.scuderiaciriani.com/rx7/fan_mod.html

"How fan speed affected by relays:

* Off, none on
* Low speed comes on when relays 2 & 4 are active.
* Med speed comes on when 2 & 4 are on plus _either_ 3 or 1 comes on but not both
* High speed comes on when all are on. "

Julian

Nzo

Very interesting, keep up the great work! A ton of us Nissan owners would love to get our hands on this.

FastHatch

Thanks for the info Julian. The PFC (for the FD3S) has only 3 settings, Fan 1 AC On, Fan 1 AC Off and Fan 2, but no settings for the fan speed.

Does the PFC control also the fan speed automatically or does it turn on the fans on high speed?

FastHatch

Could you give me some infos about the Air Flow settings? First there is a Voltage map with mV values. And then there are 5 Air Flow maps from which you can select one as the current active.

I guess the voltage values are the breakpoints / map reference for the other maps, right?

But what is the unit / meaning of the 5 air flow maps?

Is there any Nissan PFC board?

Nzo

The voltage settings are air flow signal correction used to compensate for small differences in mafs or air filters. The next screen with 5 maf options is just a screen enabling users to chose what maf they have installed on their engine. The list includes popular upgrade mafs. http://www.members.aol.com/SRFiveTen/pages/AirFlow.htm

Your best bet to get nissan-specific PFC information would be http://forums.freshalloy.com/ubbthreads/ubbthreads.php. User srfiveten and others are pretty experienced PFC users on there.

FastHatch

I think we are talking about different things, with the commander you can set Air Flow Voltage Injection Correction (0.64V, ....) and you can select an Air Flow Meter / Intake.

Internally the PFC has a map for each Air Flow Meter option with 32 values for each map and a breakpoint map with Air Flow Voltage.

That means if you are selecting a different option you are selecting a different map.

The values goes from 0 to 4000 for the stock air flow meter.

Nzo

Hmmm, well if its a mode thats accessable through the commander it may be a rotary specific menu, I dont have any menu like that on my PFC. If its a datalogit menu I dont have a datalogit :\

Rudy 34

I've told you that I can do some tests on subaru PFC but i did not received any query for tests or questions (no PM). I would be happy to help you whenever I can, just ask and I'll try

FastHatch

Sorry, but i don't need Beta testers yet. "Maximum" has helped me with some icons and i really appreciate it

I still need a description for the following settings:

- Metering Oil Pump, what does the correction value do?
- Sequential Turbo (TPS, Hys Hi, Hys Lo), how does it work?
- Air Flow Warning, why is that necessary?
- o2 Feedback, is that the Target AF, or the value where it goes into open loop if the value of current cell in the fuel correction map is above that value??
- Boost control has a "Normal Solenoid Duty", what does that mean?
- The PFC for the 13B-REW has a setting with RPM and Boost, FC Edit calls it "Boost vs. Ignition S.F." with "RPM over idle". What is the usage of this? Setting a max boost value for about 700 to 1700 RPM seems to be a little useless? Does the smaller turbo spool that fast?

I will also release a viewer/logger for PDA's (Win CE and Mobile) and Symbian cell phones within the next weeks.

EvoErik

Rudy 34

I don't have a RX7 but will try to help you anyway:

Concerning sequential turbo:
TPS should be for throttle position sensor so it can be the value to trigger turbo.
Hys Hi and Hys Lo should be the hysteresis hi and low value. If it's based on TPS value, should mean that when TPS is greater then Hys Hi, turbo is on and when TPS go back under Hys Lo, turbo is off. Hysteresis may be used to avoid on/off fast sequence when you are around the desired value.

Boost control normal duty:
May be like an offset value for solenoid ... So this value is the base duty and PFC add some duty when needed. In this way, waste gate will never see the real pressure. Will try to find more information.

Air Flow warning:
Should be used to detect problem on MAF. Do you have a default value for this one ? It can be the minimum value for idle speed of at a given TPS.

Rudy 34

So, does someone has already made a working hardware interface ? This link http://www.emicros.com/i2c232.htm does not seems to be ok as some translation is done in the interface.

FastHatch

Let me know if the menus are understandable or if you would rename some items.
There are 2 settings that i don't understand yet, FC Datalogit calls them "Boost vs Ignition S.F." and "Inj vs Accel TPS".

There also some settings that even Power Excel Dealers can't view or set. Idle ignition control seems to be programmable and there are also some RPM and correction settings. Idle Air settings seems to be programmable too.

The whole communication / settings part is written entirely in ANSI C, that means it can be ported to nearly any hardware. The Pocket PC development environment is already installed

Mestre

hmm, FastTech I can find those answers out for you but it'll take a couple weeks. I have some people on nopistons who'd be happy to figure out or know already what those things mean. Problem with a lot of this is that most of the guys earlier (such as Kyle B. etc.) Got so busy with work/life they just really stopped working with the cars period. Shoot me a reply to if you still need the above information found out and I can more than likely get all the answers you need.

Also as a side note has anyone made or figured out how to create the physical adapter to replace the datalogit? They are nigh inpossible to get ahold of in a timely fashion so creating one or just having someone throw one together for you would be superb.

T.c.

P.s. i'd be more than happy to toss a few bucks in for the above.

Rudy 34

Do you know nothing more about "Boost vs Ignition S.F." and "Inj vs Accel TPS" ? Is it a one value (scale factor) or a 2D MAP ?

NewbernD

iTrader: (1)

Let me see if i can help. I'm looking at Datalogit v1.110 and don't see all of the terms that you use in there. There is a "Oiler vs Water Temp" correction curve. The hotter the engine gets, the more oil it injects into the housing through the Metering Oil Pump.

I don't see an Air Flow Warning. Where did this come from?

O2 feedback: I'm pretty sure that when you have O2 feedback enabled, closed loop only functions when the fuel value is below the O2 feedback setting.. This keeps closed loop active only where the O2 sensor is accurate.. idle & cruise.

Boost control Normal Duty Cycle is the initial duty cycle for the boost controller. It will take control of the duty cycle as you approach your target boost so you don't over-shoot. This should be set as high as possible without over-boosting. (On my single turbo, 46mm wastegate, mine is set at 35%. Any higher and the boost climbs so fast it over-shoots. 0 = running on spring pressure alone.)

Boost VS Ign S.F. Good question. No clue.

Inj vs Accel TPS: or Injector vs Acceleration of TPS. This is your throttle fuel enrichment/fuel squirters. These figures plot a curve that determines how much extra fuel to inject based on delta TPS over some time. Gentle movement keeps the input low. Stabbing the throttle pushes the input higher.

Hope that helps.

Dave

FastHatch

Yes, i've named some settings different then FC Datalogit. I don't know why they call it "Oiler vs Water Temp", i like "Metering Oil Pump" better. You can set 3 correction values vs. water temperature. But these are correction values, that means that there must be a base / reference value. What is it?


There are two different types of PFC's MAF and MAP based. The ones with an air flow sensor have this setting. By default it is set to throw a CEL if value is out of the sensor range, >= Max. Voltage.


That's what i think, you can only set when the PFC goes into open loop. If the value in the current fuel correction map cell is above or equal the o2 feedback value than the PFC goes into open loop. But that means you can't set a target AF for closed loop.


Thanks


The 2 boost values belongs to "Ignition vs. Water temperature (Hot)".
But i'm not sure yet how the boost values work.


So far so good, but the first values are TPS voltage (not TPS%), 0.053V, 0.195V and 0.400V and the correction values are 0.398, 0.726 and 1.000. FC Datalogit displays the values in a raw format.

The max. correction value is 1.000 and every below that enleans the mixture. So it can't be accel TPS. I'd guess it Deceleration enleanment.

---------------------------------------------------------------------------------------

I have an other question which i've already posted in the Datalogit group, but seems like nobody has an answer:

The PFC has 2 "Inj. vs. Air temp" settings, one with fixed air
temperature breakpoints from -30C to +80C and one with editable air
temperature breakpoints.

The one with the fixed breakpoints has 0.977 and 0.949 as correction
values for +50C and +80C default while the other one has 1.000, 1.047
and 1.078 for 60C, 70C and 80C.

Why does one table enlean the mixture while the other enrich it?

Does the table with the editable breakpoints override the one with the
fixed breakpoints or are both tables applied?

FastHatch

See my post above.

FastHatch