rusefi.com

What would be the reason not to run the higher fuel efficiency settings in part throttle? If you always go with high efficiency, the need for a second table goes away.

I run two different timing maps and EBC maps- one each for track use and street use. Since track is more demanding I dial down boost and go a little more conservative with timing. On the street where you rarely see high boost I go more aggressive. Fuel maps are the same though.

I believe the coil is being pulled low by the igniter and the other side is connected to +12V (IGN), essentially acting as a pullup. So a pullup resistor (start at 1kOhm as suggested by kb1gtt) should work.

Like a ginger stepchild that only a mother could love. It's the hunchback Miata. Let's name it Notre Dame?
Awesome!

The sender is just a resistor, the gauge consists of multiple resistors and electromagnetic components. Some resistors in series with electromagnets, some parallel. One of my '99 Miata gauges - don't remember which one - even has a diode. So no surprise these things are non-linear. Don't bother with...

The gauge itself has a resistance and that's an inductor- no idea, what it will do. There may be other things going on as well. Hard to tell without bench-testing the gauge. I'd say you're overthinking it. You have two reasonable looking data points: Voltage at 0 psi and voltage at 45 psi. And that ...

That BLOWS!
Sorry man. I'm definitely interested in the post-mortem. Post pictures.

On the plus side: You now have the opportunity to build it stronger.

Back from vacation and caught up with most of the other BS. So last night I made some small progress on my Frankenso install: - Fitted board to my 'new' BPE2 housing - Modded housing for external USB Type A plug - Modded housing to add a microphone plug (see below) - Decided to use the signal wire f...

Millions and millions of cars run happily on batch injection. Don't worry about it. Sequential injection is to get that last 1% out of the engine. This is NOT the problem you're looking for.
Edit: Removed previously posted WB info.

You can use a divider. Go fairly high resistance, maybe 2.2K and 1K, and you won't distort the signal to the OEM gauge much.

A few observations from the log: - It appears you're idling. But MAP is at around 60kPa. It should be around 30kPa or so. Your MAP sensor calibration may be wrong, or you're sourcing MAP from where you shouldn't. Or something else :D - I usually get the type of oscillation you see at high MAP when I...

It's a real pressure transducer- meaning it changes resistance with pressure. This behavior will not be linear. I have never seen a calibration curve for it though. I assume you want to read it with the Rusefi. Just hook up a series resistor - something between 10Ohm and 330Ohm would probably be OK....

Stock ECU is using MAF, not MAP, so the y-axis scaling is totally pointless for us anyway. But I would assume that the top row is idle and the bottom row is full throttle (equivalent to 100kpa). My timing is a little more aggressive up top (see 99.5kpa row). But I am running 93 octane and checked fo...

Two 8x8 FSIO tables are already available via Tuner Studio, the code to use these for table-based PWM control is getting closer. Let me get back from vacations and I will get this stuff finished. Is there any way to change the Y-Axis value on those 8x8 tables? Right now they seem to be configured f...

russian wrote:

stefanst wrote:Searched in the forum and the wiki and found what should fit. Ordered from Ebay for $15- not too bad.

But HOW? I need to re-stock on the compatible cases and I see NONE under $75 on eBay!

I got lucky! Broken ECU in functional case.....

If we go optic bus via plastic wire that's cut with scissors, each board would be much smaller, and a mistake that breaks a board would be isolated to a lower $ if you have to scrap the board. Progress is an amazing thing. Last time I dealt with fiberoptics for data transmission (on analyzers), the...

Looks like they had 1.6 NB in Europe and Japan - see https://en.wikipedia.org/wiki/Mazda_MX-5#Second_generation_.28NB.29 Correct. I believe the pinout is largely compatible with US NB 1.8l. Only differences are clutch-switch for starter interlock and maybe fuel-pump for some security reason. I'm go...

Is there really a use-case for removable, not soldered connection between the carrier board and a module? Definitely for development work- for production boards I would solder the connection. But if we're using pin-headers, either option is open. Typical ECU case would allow the vertical module to ...

First to address the issue with the development cars: I have a '99 Miata that already ran on the Frankenso and I hope to switch it over completely from Megasquirt by the end of April. The MS that gets freed up by that will then go into my 2003 Miata, so I can learn about tuning VVT. Once I understan...

First: The current state of affairs is such that it appears primary development focus should be on software, rather than hardware. That being said, HW development is going on and appears to be going strong, so knowing where we're headed may help. The subject of HW concept has been brought up multipl...

New TS version after quite a wait. Will try this weekend.....
http://www.efianalytics.com/TunerStudio/beta/

AS long as we get to crack the whip on you as soon as you're back to negate all the relaxation you may have experienced, we'll be OK with you being out for now.

Another area where the generic 3D PWM control may be useful is for idle control. Here a 8x8 matrix would definitely be sufficient. Target RPM on the x-axis, CLT on the y-axis. PWM% as value. Either in open loop, or closed loop with seed (...offset value, start value, whatever you call it...). Target...

Any progress reports/pictures?

It's Alive!!! russian : Can I have an official rusefi number for my car please? Plugged in the bare board. Verified that the sensors read correctly and cranked. Took a little, but it fired up no problem. Engine revs, everything that I hooked up seems to be working perfectly. Before I start tuning th...

In order to run the car I will use 276 degrees. Just wanted to check timing without any offsets. I must admit that I don't quite understand why 276 degrees. As far as I know the offset between the #1 indicator (I believe that is the single mark on the CAM and actual TDC is 6 degrees). Where do the a...

Definitely has to do with #1TDC. A trigger offset of 45deg makes the dwell times nice and consistent.
Turning off engine and sensor sniffing has no effect.

It definitley has to do with #1TDC. I'll also try a trigger offset to see what happens. I was running everything at 0deg for testing. It happens the same with self-stimulation and on the Jimstim. Will turn the sniffers off manually to verify. The engine sniffer works at 2400rpm, but not at 3000rpm, ...

There seems to be a similar problem going on with injector 4: Pulsewidth varies from 4.43ms to 4.53ms. All the other injectors seem perfectly consistent.

I was doing some more scoping and found a timing issue: The dwell on coil 1 (responsible for cylinders 1 and 4) varies up and down by 0.1ms. In theory that wouldn't hurt too badly. However it appears that the beginning of the dwell is timed correctly, but the end either comes too early or too late. ...