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Old 10-17-2006, 07:49 PM   #1
LetItSnow
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Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Cicero, NY
Vehicle:
'10 &'12 Foresters
another Miata convert

Default A Heap of Stuff Regarding the Perfect Power SMT6

Naturally, this is a work in progress. Give me some time...

Please, post no hate mail, off-topic chatter, nor assorted bickering. I'd really like to keep this thread as clean as possible!

Links

In this page:
Which method should I use to install my SMT6?
How do I configure my SMT6?
How do I wire the SMT6 into my ECU?
Any good tips on wiring work?
How do I develop maps?
Troubleshooting FAQ

External:
Link to my project progress, slightly behind in updates. (7/11/06)
Perfect Power webpage (7/11/06)
Perfect Power forums (7/11/06)
Downloads for the Perfect Power SMT6 documentation. (7/11/06)

Regarding the documentation - You will want to have at least these:
* Installation Guide v1.2 (released 6/05)
* Developers Manual (released 7/03)
* Application Notes (released 6/05)
* Windows Operations Manual (released 2/04)
* DOS Operations Manual v1.1 (released 6/05)

It may seem odd that I'm recommending the older of the two Windows Operations Manuals that are available, and that I'd advise acquiring the DOS Operations Manual, but they both have their merits. The older Windows Operations Manual is more accurate and legible than the newer one, and the DOS Operations Manual has some configuration commands that aren't covered in other documentation, which you can enter in the DOS Commands Window in the main window of the Windows interface.
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Last edited by LetItSnow; 12-29-2006 at 03:05 PM.
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Old 10-17-2006, 07:49 PM   #2
LetItSnow
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Location: Cicero, NY
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'10 &'12 Foresters
another Miata convert

Default

Which method should I use to install my SMT6?

Crank sensor trigger installation
* No chance of burning the coilpack
* No chance of advancing ignition timing

Ignition line trigger installation
* Avoidable chance of burning the coilpack
* Ability to advance ignition timing

Those are your choices. You have to measure the value of being able to advance your ignition timing. Do some research on the advantages, and make your decision from there.

Notation:
In any variation between the installation styles, I will designate the difference with IG for the ignition style configuration, and CS for the crankshaft sensor style install.

ECU Connections
These are the necessary connections in both applications:
* Ground (pref. ignition system)
* Control Unit Power Supply
* Throttle Position Sensor Signal
* MAF/MAP Sensor Signal
* IG: Ignition Control #1, #2
* IG: Ignition Control #3, #4
* CS: Crankshaft Position Sensor Signal

Optional ECU connections:
* Engine Coolant Temperature Sensor Signal
* Rear Oxygen Sensor Signal (Consider that this is not very useful.)

Other connections:
* A/B Map Switch
* Setpoint Control

Last edited by LetItSnow; 11-25-2006 at 11:02 AM.
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Old 10-17-2006, 07:50 PM   #3
LetItSnow
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Default

How do I configure my SMT6?

Quote:
This is the information I've compiled for the justification of the configuration and calibration of the SMT6 in the application of the 2.5L NA MAP/MAF engine. Others may be similar. If there is anything which should be changed or added, please PM these changes to me, and I will enter them. I'd rather not have the thread filled with doubled information. That being said... away we go.
For any references below, here's the guide:

AN = Application Notes (6/05)
DM = Developer's Manual v1.2
IG = Installation Guide v1.2
WM = Windows Tuning Software Manual v7.1

While there is a newer Windows manual, in contrast to v7.1, it contains errors and is less legible.

Be aware that, although the Global Settings do show up in the map files, both maps stored in the SMT6 need to use the same Global Settings! (7/18/06)

Global Settings -> Analog

Fuel Zero Calibration
With the PP6 powered but disconnected from the vehicle, measure the voltage between the MAP/MAF in and out (blue and violet wires). Adjust the Fuel Zero Calibration so that the difference is 0.0196V or less.
EDIT: The adjustments are steps of .0392V. The voltage above is corrected. (8/27/06)

Fuel Upper Limit and Fuel Lower Limit
These settings match the upper and lower limits of the MAP or MAF sensor signal. My MAP settings are 3.6v for high, and 1.2v for low. Can anyone supply the MAF operational settings? PM me?

Global Settings -> Ignition

Teeth per turn (incl. miss) and Teeth per firing
IG:Mode 12 demands 1 tooth per firing and 2 teeth per turn. DM, p.28
CS:Mode 20 uses 8 teeth per turn (signal count in two turns). Any number can be used in teeth per firing; 1 is recommended. IM, p.9

Ignition Adv. Limit and Ignition Ret. Limit
Allegedly, the Subaru ECU will be unhappy with ignition modifications more than 12 degrees. Set for +/- 12.

Ign. Dwell Time
I'm not aware of any reason to change this from zero in this application... sorry.

Global Settings -> Speed

The road speed governor only works with mode 11. Since we're restricted to mode 12 and 20, this function is disabled, and these settings don't matter. DM, p.27

Global Settings -> Cylinders

I counted my spark plug wires twice, and got 4 both times.

Global Settings -> Switch

When any of the switch points are exceeded, the orange wire is live, at a maximum of 0.1 amp and 25 volts. To disable any of the setpoints, set them to the minimum level. AN3.6, p.1-2

Global Settings -> Modes

IG: The only mode which will accommodate the dual-signal, wasted spark ignition that Subaru uses in this application is Mode 12. DM, p. 15
CS: The crankshaft sensor is best read in Mode 20. DM, p.16

Global Settings -> System Config

Positive input pol: ON
Positive output pol: ON
The ignition triggers on a "high" signal.
EDIT: Per the advice of PerfectPower regarding experiments for saving our coils, I tried reversing these, and instead of the normal smooth rev when hitting the gas, the engine got all choked up like if it had a temporary loss of fuel or something... this is not the solution. The above settings are correct.

Low level input: OFF
The ignition signal is a waveform, between 1.0 and 3.4V, triggering at a point between. The crankshaft position sensor signal cycles between -7V and +7V. High level input triggers at 2.5V, and low level input triggers at 0.1V, making high level the obvious choice. DM, p.38
EDIT: My findings with the oscilloscope in Experiment 3 have found the ignition signal to switch between 0.3v and 10.2v, instead of 1.0v and 3.4v. High level is still the correct setting. (8/20/06)

Low deviation: ON
High deviation allows for adjustments up to +/-5V (+/-127x.039V). Low deviation allows for adjustments up to +/-1.2V (+/-127x.039V/4).
The range on the MAP sensor while the engine is running is .6V, so with low deviation, you can adjust the full range, but with finer adjustments than high deviation. If you've got any maps with high deviation, switch to low deviation and multiply all the map values by 4.
EDIT: In doing this, don't change the scale values, just the 8x16 maps.
Any information on the MAF sensor's running signal would be appreciated. PM me?

Interlaced signal:
"The interlaced mode applies to 4 cylinder wasted spark output modification". DM, p.28
IG: ON
CS: OFF

I prefer to follow the maps that were given to me, and disable any settings which don't influence the application. Here they are, with the reasons why they're not used:

High frequency: OFF
This setting is used in mode 10. DM, p.21

One missing tooth: OFF
Missing tooth applies to mode 1. DM, p.25

Multi coils: OFF
Applies to standalone applications. WM, p.12

Nox injection: OFF
The additional injector isn't used in this application.

Lambda input and Lambda un-linear: OFF
In configuring MAP and MAF modification, lambda tuning is not possible.

Scale Settings

Setting these values with the arrow keys and so on per the instructions in the window didn't come intuitive. If you want to use them, click the Apply button, then any bar on the graph, and hold SHIFT while you navigate and adjust the graph.

Scale Settings ->RPM Scale

The minimum value should be no less than 600RPM (WM, p.13). The car should idle on the second row (IG, p.9). The maximum RPM setting should match that of your engine (IG, p.9). The RPM listed on the end of each row indicates the break before moving up a row (WM, p.5); if the end of a row says "2000", then at 2001RPM, the SMT6 will move up to the next row.

If you're using an existing map, make sure you don't disturb the rest of the scale when you make changes. In this application, I advise setting the low value to 600RPM, which will put the map on the second row at idle. Set the maximum value for the highest point you want to tune, your redline, or your fuel cutoff if you head out that way often.

Scale settings -> Deflection

On any map screen, under the deflection scale along the bottom of the map is a reading of the Load Deflection. To calibrate the SMT6 to your car, find the value for that reading when the throttle is completely closed (off the pedal - "LOW" below) and when it is wide open (pedal on the floor - "HI" below). I can get a little bit more out of the pedal if I really lay into it, but it doesn't occur in my normal max pedal pressure, so I use the lower of the two as a mark for the high end. For an even dispersal of range, I advise:

Minimum = LOW+((HIGH-LOW)/8)
Maximum = HI+1

The manual recommends a different method, using automatic tuning (WM, p.13), but it renders the first column all but useless, as any movement of the throttle at all takes it to the next column.

Last edited by LetItSnow; 11-25-2006 at 10:50 AM.
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Old 10-17-2006, 07:51 PM   #4
LetItSnow
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Join Date: Jun 2003
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Location: Cicero, NY
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'10 &'12 Foresters
another Miata convert

Default

More space.
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Old 10-17-2006, 07:51 PM   #5
LetItSnow
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another Miata convert

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Even more space.
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Old 10-17-2006, 07:51 PM   #6
LetItSnow
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More more space.
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Old 10-17-2006, 07:52 PM   #7
LetItSnow
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Much more space.
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Old 10-17-2006, 07:52 PM   #8
LetItSnow
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Some more space.
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Old 10-17-2006, 07:52 PM   #9
LetItSnow
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Space for more stuff.
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Old 10-17-2006, 07:53 PM   #10
LetItSnow
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ttt space.
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Old 10-17-2006, 07:53 PM   #11
LetItSnow
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Please hold your replies for a bit? space.
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Old 08-25-2007, 03:50 PM   #12
Jupilerman
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Default

Quote:
Originally Posted by LetItSnow View Post
How do I configure my SMT6?
Global Settings -> Ignition

Teeth per turn (incl. miss) and Teeth per firing
IG:Mode 12 demands 1 tooth per firing and 2 teeth per turn. DM, p.28
CS:Mode 20 uses 8 teeth per turn (signal count in two turns). Any number can be used in teeth per firing; 1 is recommended. IM, p.9
Hi, I´ve been reading some of the manuals. But can´t really get a grip on the "teeth per turn" and "teeth per firing" data. From what I´ve read there sure are differtent interpretations. And I for one have a very strange reluctor ring :-)

I don´t drive a subaru, but the interpretation of the above should be the same, irrespective of the engine type. I won´t write what my interpretation is because obviously it´s the wrong one. Could you please enlighten on this subject,
thanks in advance,
david.

Last edited by Jupilerman; 08-25-2007 at 05:16 PM.
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Old 08-25-2007, 04:25 PM   #13
LetItSnow
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OK, first question: How many cylinders and how many coils (not coilpacks!) do you have? If you have redundant spark, that matters, too.
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Old 08-26-2007, 05:08 AM   #14
Jupilerman
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Default

Hi! I was thinking of a definition of the terms used. As this is a Subaru forum and don´t want to spoil this interesting thread with non-scooby info.

I have 4 cylinders. 1 coil, 1 distributor, 36 teeth on the reluctor wheel, an inductive sensor (magnet+coil) and 4 missing teeth. Strangly, the 4 missing teeth are in the most akward places. 0°-120°-180°-310°. that´s what the workshopmanual says, but I didn´t do a scope test to check. So I don´t believe the positions are correct.(the manual has been proven wrong as for teeth position on other engines of this brand). MG-Rover were reknown for their inaccuracy.

It´s just that the global settings in the smt6 wiring diagram for my car says

teeth per turn incl missing: 2
teeth per firing: 1

which according to the installation manual is calculated following the bi-polar ignition signals (whatever is meant by this)
teeth per turn=#cyl : 2 = 4:2 = 2
teeth per firing = 1

I thought I´d need to use the missing tooth setting (that sentence I understand, but is bipolas as well, not?)
teeth per turn = 36
teeth per firing=(teeth per turn : #cyl ) * 2 = (36 : 4) * 2 = 18

I understand how ignition systems work, but the logic of the above calculations,..., that, I don´t get. Problem is I like to understand things before I start messing around with settings and things.

The choice of words in the PP manuals is not always to the best of english standards. Unfortunatel english not being my mother tongue, complicates things even a bit more.

thanks
david

Last edited by Jupilerman; 08-26-2007 at 12:58 PM. Reason: forgot to subscribe
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Old 09-28-2007, 12:35 AM   #15
GVR41700
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Default SMT6 2005 RS turbo

Does anyone know what the global settings would be for a 2005 Impreza RS? I'm using the crankshaft position sensor so do i still need to use the 2.2k resistor? Would it hurt anything if I did use it?
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Old 02-09-2008, 07:53 PM   #16
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bump bump
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Old 10-10-2008, 03:17 PM   #17
aclver1
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I have the PP6 and installed it using the crankshaft position sensor and am running the stage 2 map, I want to install cams. Will I need to advance my ignition timing or can I just run the stage 3 map and be fine?
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Old 03-31-2009, 04:05 PM   #18
rsti2.5l
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ypur PM box is full i downloaded the one off PerfectPower.com its the 2.6 software. Also what is causing my car not to run? did i add or didnt add something needed i get cranks but no catch.


O and my car is a 2000 impreza 2.5rs and i did the wiring just like you have on yours could that be why
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Old 06-13-2009, 11:45 PM   #19
reddevil
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Old 12-05-2012, 10:00 PM   #20
SlipperyPanda
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Anyone out there with 99 RS with AVO kit? I would really like to share some maps and global settings. I just cant get mine to run right.

Also, does anyone know if I can hook up a 5v wideband to the SMT6/PP6?
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Old 04-13-2013, 10:58 AM   #21
tenchu
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Can we bring this back from the dead? I'm considering an smt6 to tune my 98 Forester when I turbo it. Would like some more info / map suggestions
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Old 04-16-2013, 11:36 PM   #22
thebeephaha
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I just got my SMT6 installed in my 2003 Forester 2.5x.

It won't start unless I change the global setting for 'low level input' to 'on'. The manual says it should be 'off'. If it is on the car will start and idle very poorly and the RPMs jump around, so it has to be changed back to off to drive. Anybody with any experience with this?

I do also have the 330 OHM resistor soldered from ground to the crank signal going into the SMT6 as instructed, without this the car will not run at all.

I'm thinking I may have an issue with the wrong settings for teeth per turn and teeth per fire. My crank gear has 6 teeth. I was told that for firing divide the teeth by 2. Also that the SMT6 counts two full rotations of the crank gear so that would make my settings 12-6? I've tried a huge combination of other numbers, but the RPM is always wrong with them.

With the shorting plug in place of the SMT6 I have no issues at all and the car drives like stock.


Last edited by thebeephaha; 04-18-2013 at 04:07 AM.
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Old 04-17-2013, 03:27 PM   #23
thebeephaha
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Supercharged in Gold

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Small update. I contacted Perfect Power, nothing conclusive yet but I did get some information about the 5th injector wiring as well as some suggested global settings:

Quote:
The wiring for the 5th or extra injector is incorrect. The connection to the Smt6 grey black wire is correct, the other wire from the injector must go to +12 volts NOT to ground.

Try teeth per turn 6 and 3 teeth per firing. Use mode 20
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