So who wants their ECU's "Chromed"?

[aaronatstate]

Not sure if I posted this here, but here are what my periphery bits are set to. This get's me no driveability issues, and no CEL with a 92 Federal TT, with absolutely no emissions equipment hooked up or installed. Should be known this is on the chromed rom, and thats why the warmup retard bit is disabled.

[3krazygt]

Has there been any progress to using 98-99 SL ECUs for flashing? And is there any more specifics to what features are not included/ unwanted side effects in using SL ECUs?

EDIT: I dug more into this thread and found your answer:

A: The SL ecu lacks the drivers for the stock boost gauge and BCS

So it seems to me that using an SL ECU is reasonably possible. Maybe you would consider adding this to first post? Might encourage more SL ECU owners to experiment and add helpful feedback.

EDIT EDIT: OK I've read enough on this, I don't even want to bring up this subject again! I'm going to try this on my SL ECU though.

[HLxDrummer]

Has anybody had any negative side effects running this on an SL ECU? I know some features won't work, but are there any other downsides?

[3krazygt]

Has anybody had any negative side effects running this on an SL ECU? I know some features won't work, but are there any other downsides?

Well based on my long reading lesson from last night it is my understanding that there is simply just not enough feedback for a complete conclusion.

There are many that say "no problems, been running it for months" but then others claim they are adamant there is some sort of risk involved. I don't know HOW they make this claim as most of them are choosing to run a VR4 ECU anyway. So if they aren't running an SL ECU, and nobody has ever claimed a catastropic failure, I would say it is all up to the owner.

For me, I will be trying this on SL ecu. I'm quite frankly not scared to blow anything based on NO evidence that flashing an SL ecu will. It is all complete speculation and a degree of how anal you are.

Bottom line is:
No input for boost monitor
No input for wastegate control
Knock sensor circuit is possibly wired in a different configuration but output parameters are the same.

I guess we really won't know any adverse effects unless someone claims a flashed SL ECU blew their motor. So somebody has to try it.

[HLxDrummer]

Is it possible to wire in a say 3bar GM sensor and run the stock gauge from that accurately? Looking to get rid of my aftermarket gauge in conjunction with the LCD boost controller.

[Greg E]

Is it possible to wire in a say 3bar GM sensor and run the stock gauge from that accurately? Looking to get rid of my aftermarket gauge in conjunction with the LCD boost controller.

The MAP sensor input exists on all flashable ecus. The boost gauge driver does not exist. What this means is you can log boost with evoscan but even if you hooked up the stock boost gauge, it'll never show anything.

[Jesters Deadd]

Well based on my long reading lesson from last night it is my understanding that there is simply just not enough feedback for a complete conclusion.

There are many that say "no problems, been running it for months" but then others claim they are adamant there is some sort of risk involved. I don't know HOW they make this claim as most of them are choosing to run a VR4 ECU anyway. So if they aren't running an SL ECU, and nobody has ever claimed a catastropic failure, I would say it is all up to the owner.

For me, I will be trying this on SL ecu. I'm quite frankly not scared to blow anything based on NO evidence that flashing an SL ecu will. It is all complete speculation and a degree of how anal you are.

Bottom line is:
No input for boost monitor
No input for wastegate control
Knock sensor circuit is possibly wired in a different configuration but output parameters are the same.

I guess we really won't know any adverse effects unless someone claims a flashed SL ECU blew their motor. So somebody has to try it.

even then it will be most likely the owners fault for doing somthing stupid.
Bottom line is: SL vs VR4 ecu
No output for boost meter
No output for stock wastegate
No output for low fuel relay
every thing else is the same.
There are many people running the SL Ecu no problems.

[Greg E]

Bottom line is:
No input for boost monitor

Knock sensor circuit is possibly wired in a different configuration but output parameters are the same.

There is an input for boost monitoring... The MAP sensor is for emissions. It tells the ecu when a certain vac is in the manifold and the ecu uses this to operate the EGR solenoid. In my ROM this is disabled. Any sensor can be wired to this MAP sensor input (pin 92) and the MUT still reads this data. This is where I have EVOScan setup to log.

The main reason I suggest everyone use the VR4 ecu is to take full advantage of all the features in the chromed ECU. I think I was the first person to try a VR4 ROM on an SL ecu and it worked fine (I had a starting issue at first but that was a mechanical issue with my car). The debate spawned when it was discovered that the wiring circuitry for the knock sensor went into different blinds between the two boards.

The argument was that the blinds should be mapped before claiming that it'll work fine. The counter argument is that the Mitsubishi documentation shows they are the same.

The trump card in this whole debate is the VR4 ROM is coded with it's own filtering subroutines. So it shouldn't matter if the hardware filtering is in place or not. The code will still read the same. I haven't tested this enough first hand to feel comfortable recommending others are safe in doing the same.

Hope this helps clear up some things.

[Zybrainn]

Is it possible to wire in a say 3bar GM sensor and run the stock gauge from that accurately? Looking to get rid of my aftermarket gauge in conjunction with the LCD boost controller.

Why not just display boost through the lcd boost controller?

[HLxDrummer]

The MAP sensor input exists on all flashable ecus. The boost gauge driver does not exist. What this means is you can log boost with evoscan but even if you hooked up the stock boost gauge, it'll never show anything.

Ok and if you had a VR4 ECU the GM sensor would work? Not just the Evo one (don't have the right plenum)?

Why not just display boost through the lcd boost controller?

I will displaying boost on the LCD, but I was considering running wideband/boost to the ECU first so I can log using one cable (tactrix) instead of flashing, swapping cables, logging, etc. However, I want to be able to keep the LCD screen with boost/wideband even if I swap ECUs again (and running them straight to the LCD gives a better sampling rate) so I will be logging through the LCD.

However, if I get a VR4 ECU and I can make the stock boost gauge work I will run boost to the ECU to get rid of my aftermarket gauge (less clutter). Even just with the LCD I am considering getting rid of the gauge, but there is something nice about seeing a needle while your driving in comparison to a digital display...

Looking forward to using your stuff, though, Greg. Thanks for putting all this together seems really badass!