Kenneth's ECU Mods (1.02 IMPORTANT UPDATE)

[Kenneth]

someone wanted a video of the stationary RPM limit with no muffler... Well I have one with no rear muffler (centre fujitsubo resonators are still there)

It isn't perfect because there is lots of condensation. I should really drive somewhere and re-do it but hey. It was pretty loud and the video doesn't do it justice. I should get some video editing software to cut it down as the video is 44MB

[Kenneth]

can we embed youtube on this forum?

[kc427]

Kenneth,

Just found out something, but, you maybe already know about it. Anyway, here is what I tested, only the "Ignition Map2 Hi Octane", (with address 0x118b9 table), I modified the ignition timing in the cells 1500, 2000rpm and 20, 30, 40 load, and then logged with Evoscan with revving to around 1500rpm. I found that the ignition timing has been changed to similar to what I changed in the table. Then I turned on the A/C, and the ignition timing immediately changed back to the original value; and then I turned off A/C again, and the ignition timing changed to the modified value.

So, I assume:

Ignition Map 1, 1176F, A/C on
Ignition Map 2, 118B9, A/C off

Do you think my assumption is correct? or you already know about this?

KC

[jamk]

Hi all!

This is my development on our ecu program - advanced fuel & ign maps & LC
http://www.youtube.com/watch?v=my6vX..._order&list=UL

That you think ?

[jamk]

So, I assume:

Ignition Map 1, 1176F, A/C on
Ignition Map 2, 118B9, A/C off

Do you think my assumption is correct? or you already know about this?

KC

Yeah, i think you're right

[BCX]

i believe its to do with the inhibitor switch - or similar (between auto/manual)... i dont have an Automatic handy to try a couple of things to confirm.

this is based on my disassembly.

[phosty]

Do the fuel maps behave the same? If so, is this not in effect switchable maps?

[Kenneth]

Yes the fuel maps behave the same. There is actually a whole group of maps which are looked up in this manner.

Yes, in effect it is switchable maps. The problem is understanding what is driving the switching. If you were running a E85 map and then, for some obscure reason, the ECU changed the map lookup and you got a Petrol map, things could get interesting.

So the safe thing to do is to work around that and make sure you can guarantee which maps are going to be looked up, leaving the ECU to work as usual on the rest of them.

Do the fuel maps behave the same? If so, is this not in effect switchable maps?

[phosty]

I know switchable maps are being discussed in the KS Mods 1.03 thread, but with respect to the 'oem' maps, is the switch between the maps not simply the A/C switch as post #123 above or maybe the AT / MT input pin as per post #125? I seem to recall AndyC mentioning something similar on the geekmapped forum about AT / MT maps.

Surely if it is simply the AT / MT inhibit then there is no danger of the ecu choosing the wrong map?

[jamk]

I think i'll do the switchable maps for boost, fuel, ignition.
Kenneth Answer to the latest priv msg pls )))

[BCX]

Fuel maps arent off inhibitor switch, or A/C. the fuel maps it uses is determined by what 'configuration' the ecu is set to - eg EM2005 or EM2004 etc.

[kinkyafro]

Fuel maps arent off inhibitor switch, or A/C. the fuel maps it uses is determined by what 'configuration' the ecu is set to - eg EM2005 or EM2004 etc.

Nope it's not based on the rom label it's set by the ecu type flag I detailed it for the 7201 a while back I've also noted a third config on 7202 ecu's which basically equates to 280bhp for auto's (through map selection).

[BCX]

The EM200x number is dicated by what 'Map Index' (well in my disassembly, i called it that). there is potential for 8 configurations (periphery bits), 8 case numbers and 8 EM200x.

Basically, EM2004 has a map index of 1, EM2005 has a map index of 2.

There is also EM2003 (map index 0) and EM2006 (map index 3), but i'm yet to see any roms configured this way plus case numbers are just empty in those locations.

Using this 'map index', it'll lookup what maps to read from too for some maps - fuel maps are one that come to mind, but also some maps relating to the WG/Boost.

7201 is the same - EM0004 and EM0005 are the two main ones, but EM0003 and EM0006 exist in the ROM - no case numbers are fillout out for those locations.

[foxdie]

Interesting work there Rich / Bill

I'm guessing this may lead to switchable maps on 7201s as well now?

[kinkyafro]

Interesting work there Rich / Bill

I'm guessing this may lead to switchable maps on 7201s as well now?

Umm well...

There is a prototype that's been in my car for some time now that has 5 switch-able roms(roms not maps) using a hardware rather then software method - It was in the process of being productionised when MMCFlash for 7201's came out.

The prototype only had 1 flashable rom the other 4 were not re-flashable so I came up with another design for an ecu with 4 flashable roms and then Kenneth released his switchable map rom which given the effort to make the switchable ECU's called into question the value of continuing with it so the second design remains unproven.

The only way in-rom switchable maps are likely to happen is if Kenneth redid his rom for the 7201. If this was easy he would have done it already. I suspect that it's not going to happen unless the 7201 CPU is identified and a datasheet found and even then It would still be Hard (with a capital H).

Don't get me wrong I'd love to see Kenneth's work on a 7201 I just don't expect it to happen.

[Xaxasv6]

First Test Ride:

Knocks on:

3000 upm
112 km/h
during acceleration with 32% tps

2500 upm
48 km/h
27 % tps

3188 upm
22 km/h
40 %tps

[Kenneth]

Please do not use this ROM. Could a moderator please close this thread

THIS ROM IS OUT OF DATE AND CONTAINS "BUGS"

Please use the following thread and attached ROM: http://www.clubvr4.com/forum/showthr...ECU-Mods-V1-03