ecu remap/reflash.

[spm01]

i have been offered a remap/reflash of the standard ecu for my leggy but when i inquired into who does them etc the guy was not too forth coming with the info.
is there a remap/reflash out there that people know of? or are there too many to mention?
it is something that i would like to have but would like to hear other peoples views on remaps for the legnum. i had one on my old civic and it was great but if people have had problems with remaps i would like to know.

[Nick VR4]

I may be wrong here but I'm sure I read in here that you can't remap / reflush the ECU

I think its a piggy back ECU added

You could try searching for ECU

[Nick Mann]

Altered fuel is a good thing on VR4s, they tend to run quite rich!

But a remap on a standard ecu is not possible. From what I understand, the ecu will take it, but only until you turn the ignition off, at which point it reverts back to its normal settings. Someone on here has tried it, at a place in Bromsgrove, Worcestershire. It didn't work.

[Beastlee]

Ou of interest does adding an ECU help improve economy? Given how rich the cars run surely adding the piggy back ECUs would pay for themselves if they can reduce the wasted fuel and therefore increase economy......assuming you don't use the ECU for more .

I'm looking at the Profec EBC with the option to add in the ECU afterwards.

[stuartturbo]

But a remap on a standard ecu is not possible. From what I understand, the ecu will take it, but only until you turn the ignition off, at which point it reverts back to its normal settings. Someone on here has tried it, at a place in Bromsgrove, Worcestershire. It didn't work.

It is possible but not in the standard remap way the Chip would need to be removed from the board and the entered this way
So not very user friendly but iff you had a face lift you could reflash that into a preface lift providing chips are the same. Or even some off the Mines ?? ecu

[Gowf]

Ou of interest does adding an ECU help improve economy? Given how rich the cars run surely adding the piggy back ECUs would pay for themselves if they can reduce the wasted fuel and therefore increase economy......assuming you don't use the ECU for more .

I'm looking at the Profec EBC with the option to add in the ECU afterwards.

It all depends on how you drive it and how it is mapped.

For example, some people do run a very lean mixture at cruise, even though stoicometric is 14.7. If this 'cruise map' ( to put it simply) is somewhat of a knife edge (giving you the 14.7 on cruise only, and rapidly richening up when you slightly increase engine load) then as long as you drive it accordinly then you should have some good economy. But what you have to remember is that the factory ecu when in closed loop mode does try and shoot for 14.7 anyway.

Certainly on full chat though you will be using less fuel,as long as your retaining the same quantity of air used, ie same quantity of boost, than you would have been with standard fueling. afr's of around 9 have been seen for the VR4 at the top end, which is what kills that top end power.

Dont know if any of that made any sense, im quite tired and hungry.... i feel a quality fast food establishment calling!

[spm01]

thanks for all the replies people, so it looks like it is not possible for a remap of the standard ecu.
i will try and get some more info out of him and see if he will tell me what chip/remap it is.

is there a certain piggy back ecu i should stay well clear of or are they pretty much ok which ever one it is??

[Nick Mann]

There isn't much to choose between piggy backs. Just the price. I have a unichip and it does its job well enough. If I started again now, I would seriously consider a MAP2.

If you search on here for emanange, map2, unichip etc, you should get a lot of feedback. Many people are running ecus of one sort or another.

[spm01]

There isn't much to choose between piggy backs. Just the price. I have a unichip and it does its job well enough. If I started again now, I would seriously consider a MAP2.

If you search on here for emanange, map2, unichip etc, you should get a lot of feedback. Many people are running ecus of one sort or another.

cheers

[phosty]

It is possible but not in the standard remap way the Chip would need to be removed from the board and the entered this way
So not very user friendly but iff you had a face lift you could reflash that into a preface lift providing chips are the same. Or even some off the Mines ?? ecu

Do you mean extracting a facelift chip from the ecu board, copying it with a chip reader/flasher, then rewriting it's dump to the chip from a prefacelift?

If so, you would have done all the hard part anyway - aren't there some guys on the OpenECU forum that have already dumped the VR4 ecu chip?

http://forums.openecu.org/viewtopic....ghlight=6a13tt

If you could edit this data before writing it back to the chip (or maybe a rewriteable version of it with Pin-to-Pin compatability) then you would be there. But the last time I checked the OpenECU forum the VR4 chip dump had not been decoded to be readable in ECUFlash.

[stuartturbo]

Do you mean extracting a facelift chip from the ecu board, copying it with a chip reader/flasher, then rewriting it's dump to the chip from a prefacelift?

If so, you would have done all the hard part anyway - aren't there some guys on the OpenECU forum that have already dumped the VR4 ecu chip?

http://forums.openecu.org/viewtopic....ghlight=6a13tt

If you could edit this data before writing it back to the chip (or maybe a rewriteable version of it with Pin-to-Pin compatability) then you would be there. But the last time I checked the OpenECU forum the VR4 chip dump had not been decoded to be readable in ECUFlash.

Yes that is it. I have not done it but i believe others have.
If you knew what each point did and change it but to map this is not practical, as you would change points refit check remove mod refit

[AderC]

Latest version of ECUflash can be used to dump the VR-4 ROM, but does not yet support reflash for the H8/500 processor. Reflash IS possible (the Russian VR-4 club have done it) but Colby is still working on ironing out some bugs before enabling the reflash for our ECU's in ECUflash.

Screenshots of my freshly dumped pre-facelift ROM can be downloaded here

Would be useful to get hold of a facelift ROM to compare the maps.

aDe

[stuartturbo]

I would like one to try but not got the wedge to do it apparently the face lift is better

[Nutter_John]

You at Japshow , as you can have a dump of my rom if you want , would be good to compare the differences

[Nick Mann]

You are welcome to read mine if/when the opportunity arises. But I kind of need it...!

[AderC]

Yes I'm at Japshow. Will bring laptop and cable so I can suck the lifeblood from a facelift.

aDe

[Kieran]

Yes I'm at Japshow. Will bring laptop and cable so I can suck the lifeblood from a facelift.

aDe

Lookout, it's Count Adeula, the Data Vampire!

[Nutter_John]

looking forward to seeing the two maps together

[Eurospec]

I'd be fascinated to see the difference. I think the facelift has a little more timing, but its just a feeling!


Cheers,

Ben.

[bradc]

I don't know the differences, but the facelift is rated at 0.5kgm more torque, and is just better!