[Mk2] [Turbo] 3SGTE Test Pilot Required

[Hellboy]

Guys, what you are seeing here, is a real breakthough in terms of tuning the MR2. We really need to support and help Jeremy in any way possible.

What are the limitations here Jeremy? How far can the stock/modified ECU be pushed in comparison to a Power FC for instance?

EarL.

I don't actually know what a PFC can do so it's hard for me to answer.

I guess the limits might be if you wanted to control some new aux device that the PFC may be able to deal with but the stock ECU will have no code for and no spare I/O pins to control it.

However, the ROM board can be configured to decode extra ports so it would be possible to have 3 or 4 port outputs (CMOS logic level) that could be fed to another PCB to maybe switch an extra VSV or drive a boost controller.

Otherwise I would expect the stock ECU to have the edge because of the myriad of little maps it has that are specifically tailored to the 3SGTE engine.

The downside here is that no one will probably ever touch them as there are so many!

eg there's over a dozen coolant correction tables and dozens more coolant threshold tests.

Dozens of speed sensor tests (nearly all at slow urban or car park speeds) and even more rpm and TPS based tests which you won't get on a PFC.

Maybe the biggest downside will be my tuning interface. It will be quite basic to begin with and won't allow real time remapping. All maps would have to be edited offline and uploaded in one go.

However, there is sufficient hardware on the board to allow real time remapping in the future. But I'd have to write the code for that. The good news is that it would just be a reflash to upgrade to real time tuning so no need to return the ECU for upgrades.

I've done a real time tuning GUI for the mk1 MR2 but I don't know how it compares to the PFC GUI for example.

This is just amazing! Hats off to you - any idea of cost?

[raptor95GTS]

i think the problem here is the number of rev1 owners?? A rev2 kit would no doubt attract bigger numbers as would a rev3+ kit but I dunno. I'd love a kit like this on my own rev3. Awesome what you've managed to do with it

[JMR_AW11]

i think the problem here is the number of rev1 owners?? A rev2 kit would no doubt attract bigger numbers as would a rev3+ kit but I dunno. I'd love a kit like this on my own rev3. Awesome what you've managed to do with it

It's now fitted to a rev2 ECU and working fine so it could be tested in a rev2.

I could put it in a rev3 but it will not provide total control of the ECU mapping. I'd need to design a board with two MCU circuits on the rev3 to do that.

[luthor1]

I've got a 1993 Rev2 3SGTE Turbo.

Count me in for experimentation, testing, purchasing etc etc. Anything to get involved mate - I am mighty interested.

there is a guy that does this on the CA18DET Nissan engine, called Jez.

www.h-dev.co.uk

I have one of his chips in mine.

Like I said, count me *IN* for ANYTHING.

[raptor95GTS]

i think the problem here is the number of rev1 owners?? A rev2 kit would no doubt attract bigger numbers as would a rev3+ kit but I dunno. I'd love a kit like this on my own rev3. Awesome what you've managed to do with it

It's now fitted to a rev2 ECU and working fine so it could be tested in a rev2.

I could put it in a rev3 but it will not provide total control of the ECU mapping. I'd need to design a board with two MCU circuits on the rev3 to do that.

excellent news on the rev2 unit. What would be missing from the rev3 map control?

[JMR_AW11]

i think the problem here is the number of rev1 owners?? A rev2 kit would no doubt attract bigger numbers as would a rev3+ kit but I dunno. I'd love a kit like this on my own rev3. Awesome what you've managed to do with it

It's now fitted to a rev2 ECU and working fine so it could be tested in a rev2.

I could put it in a rev3 but it will not provide total control of the ECU mapping. I'd need to design a board with two MCU circuits on the rev3 to do that.

excellent news on the rev2 unit. What would be missing from the rev3 map control?

I don't know

I do have a rev3 ECU here but I've never took the two big MCU chips out to read the ROM from them.

I did manage to work out how to fit the datalogger and used it to find out a few things but really I'd need to remove the chips to see which one does what.

I've heard stories that one does fuel and one does ignition...

I've got a 1993 Rev2 3SGTE Turbo.

Count me in for experimentation, testing, purchasing etc etc. Anything to get involved mate - I am mighty interested.

I wish you were closer than Southampton... I just want to quickly try the ROM board in a real car before I make any more boards.

I see Jez charges £350 for a stock Nissan ECU remap. I could sell these boards for a LOT less than that plus you get laptop access to the maps yourself and you get the datalogger.

[Icsunonove]

Thanks for the comments about the datalogger board. you can post up pics of it no problem, althought the GUI is a bit old looking now. (I wrote the GUI and the dataviewer for the mk1 four years ago)

Jeremy,

Personally I don't care how old looking the GUI looks as long as it helps me diagnose and fix any problems with my engine. And it certainly will!

Here's a pic of my standard 4AGZE ECU against Jeremy's modified ECU:



Here's mine modified:



Testing it:



The GUI:



The datalogging potentials (and marketability) of this are absolutely enormous. I will be posting about this soon!

[Pete]

Excellent work . I had been wondering if someone was going to try this for the 2's, I know there are similar setups available for other marques that create great results.

Hats off to you Jeremy

P.S Any plans for the N/A MK1 Ecu's BTW?

[JMR_AW11]

Thanks for the comments about the datalogger board. you can post up pics of it no problem, althought the GUI is a bit old looking now. (I wrote the GUI and the dataviewer for the mk1 four years ago)

Jeremy,

Personally I don't care how old looking the GUI looks as long as it helps me diagnose and fix any problems with my engine. And it certainly will!

Here's a pic of my standard 4AGZE ECU against Jeremy's modified ECU:

Image Replaced With URL For Quote http://url.photobucket.com/albums/v284/ ... my_ECU.jpg

Here's mine modified:

Image Replaced With URL For Quote http://url.photobucket.com/albums/v284/ ... nished.jpg

Testing it:

Image Replaced With URL For Quote http://url.photobucket.com/albums/v284/ ... ure036.jpg

The GUI:

Image Replaced With URL For Quote http://url.photobucket.com/albums/v284/ ... altime.jpg

The datalogging potentials (and marketability) of this are absolutely enormous. I will be posting about this soon!

Thanks Tom!

The 3SGTE datalogging can run at up to 200 data requests a second and you can ask it for anything you like (except lotto numbers) eg real time knock retard, fuelling, ignition, throttle, mpg, speed, rpm, error codes, coolant temp, air temp, TVIS, turbo VSV status, engine load, boost pressure, closed loop self learning, o2 sensor voltage, ECU run time, plus a whole load more nerdy things like which maps it is running from at any time.

Also it has an accurate data timer so you can play back your journey and measure stuff like in gear acceleration to 0.1second using the mouse pointer on the data traces.

You can also fit 4 aux inputs to datalog stuff external to the ECU eg oil pressure or maybe a steering resistor pot for trackdays or oil temperature using a thermistor.

Plus you can reflash the ECU maps with this 3SGTE ROM board!

Someone test it for me pleeeeez....

[JMR_AW11]

Excellent work . I had been wondering if someone was going to try this for the 2's, I know there are similar setups available for other marques that create great results.

Hats off to you Jeremy

P.S Any plans for the N/A MK1 Ecu's BTW?

I have a mk1b MR2 myself and I did make a board for it over two years ago. It has all the same features and has real time remapping. I stopped promoting it because there really was little or no interest in it.

I know I can sell the 3SGTE boards in the USA in useful amounts but the mk1 stuff is not really cost effective to make.

Now that my mk1b is off the road with rust (no MOT) I suppose I could hire/sell out the tunable ECU in it. (89661-17140 model)

It's been running in my car for nearly two years faultlessly and it's a shame to see it doing nothing. It only fits the later mk1b MR2.

If you look basck through this thread you can see the main tuning GUI for it. It also has screens for tuning the idle maps, and warmup maps and TVIS and rev limiter.

[raptor95GTS]

JMR_AW11 - even if the rev3 is just adjusting the fuel then it's a good bit of the way to solving a few issues on that. The datalogging / display does really appeal to me just because you can see what's happening real time. But then I'm sad like that lol

[ast]

I'm even more convinced that this is the way to go. Put me on the list when you can ship prototype boards or start selling these. I have the knowledge and tools to install it, some tuning knowledge of turbo engines and wideband lambda for AFR tuning

Come on, someone who lives close enough has to test this.

[luthor1]

Jeremy,

basically, I'd like to get myself one of these, whether it's a cheaper "at your own risk" system, or something you'd lke to continue to liaise on, throw something my way for a few quid!

Luthor

[rossdymond3352]

What he said ^^

Hope we can help

Ross

[Pitcher]

I am also interested and if i was not the other site of the country (Ipswich) i would be happy to test it. If you cant find anyone closer, i may be able to find a weekend to come there to test it.

[Pitcher]

Has anyone tested this?

[JMR_AW11]

Has anyone tested this?

Nobody with a 3SGTE...

I've now reconfigured and fitted the board to a Toyota 3L V6 ECU and I've got lots more interest in this ECU. The V6 looks to have really soft mapping so it may well respond to tuning quite well even though it's an NA engine.

Over a dozen V6 owners are offering me funding to develop the board so that ECU will be the first one I make boards for.

[luthor1]

You have funding money from me!!
ie... you tell me what it costs, and I'll buy one off you??

[rossdymond3352]

i second that Andy!

Whatever it costs ill have one!

Ross

[jonp02]

maybe a stupid question, but would this mod be able to remove the afm on a rev2 tubby
either which way i'd be very interested in this as im currently installing a carputer.

thanks
jon