Custom remap

alanoo

It is not a fault table that needs work, only either a pedal pot vs throt pot table calibration or the DBW PID which may be different for the 2.4 TB (I hope it is not the case as I doubt they'll get control of it).

If it is only an overflowed MAP reading, this will be only a base fueling map issue

rabidh

I wonder whether you can get access to the knock sensor readings? It is possible that they could be used to calibrate the timing... eg. for several different engine revs, push timing later until it knocks and then back it off a few steps.

markv

rabidh said:
I wonder whether you can get access to the knock sensor readings? It is possible that they could be used to calibrate the timing... eg. for several different engine revs, push timing later until it knocks and then back it off a few steps.

In the high speed logging extention the Knock Retard (kr) is included. So you can see when the ECU decides to decrease timing advance.

Afaik it would be best to do this on a dyno. Power should drop before kr occurs, something you should be able to calibrate with a dyno..

Mark

gozer_1_4

no news?

daaaaavek

Mark ..

Have you got any further developments or updates to give us? Is Peter planning to publish any details as to what he's found out so far?

markv

After Peter installed v1.0 on my car and we did some final testing, 2 more Speedsters were remapped using the new software. As the PC software isn't finished yet, it was done as a custom remap using the new software. Both cars have the 2.4 inlet manifold and a full Tulet exhaust system including exhaust manifold.

The new mapping process works really nice. When the ECU is set in remapping mode, the CEL comes on. The CEL goes off when you have been driving long enough in a certain part of the fuel table. When in remapping mode the ECU is continuously in closed loop mode, so it is always trying to go to 14.7:1 using the lambda sensor. In RAM it makes a new table with corrections needed compared to the base table in ROM. When it has enough measurments for a cel in the table, the light goes off. So basically you drive around for an hour or so trying to get the CEL to go off 🙂 Nice thing is you can just do it on the road, no problems with cooling or excessive tirewear as you might have on a rolling road.

Other changes include a change in the table that retards ignition based on the inlet temperature. In standard mode the ECU changes ignition back from 20 degrees C! This changes help a lot in getting performance more consistent. Other changes are the complete removal of the EGR code, so no more cheaters or EGR valves needed. The speed limiter is removed, so you won't hit an extra limiter in fifth gear. The rev limiter is raised to 7000rpm, and the fuel and ignition table is extended with extra cells for the extra revs.

Results on the two speedster were pretty ok. One of them maxed out the standard injectors. So it looks like a good intake and exhaust already raises the engine output to such a level that you actually need bigger injectors.

I know Peter is working on the PC software too. Hope to be able to beta test it soon. Really like what he has done with it. There is actually a ECU base data log option in there so you can compare power output on the same engine. Usefull for adjusting the AFR in open loop and seeing what effect it has on power delivery.

I probably forgot some features 🙂 But really a major effort on Peter's part. It has costs LOADS of his free time, but the result is great 🙂

Mark

rabidh

That's great! I'm sure people will be lining up for it 🙂 It's not like you need much PC software when the ECU basically calibrates itself (does it do anything automatically for spark?)

Having been trying to develop my own management (for the 2.4 in mine) I have a whole load more respect for the massive amount of effort Peter must have gone to to reverse engineer this ECU, and then develop good software on top of what is there already.

Just one question (a bit unrelated - but for my ECU 🙂 When you say maxed out injectors, do you mean 25% duty cycle (so open pretty much when the valve is open), or full 100% (open all the time)? On mine I'm pushing nearly 100%, which pushes the idea of sequential injection out the window. The US injectors are meant for higher pressure fuel IIRC, so it might be mine are just drastically under-rated what is required.

markv

Well, you still need the PC to start and stop learning mode, flash tables etc.

There is no automatic calibration for spark at the moment. Will be pretty tricky I guess, the only sensor you can use is knock, wich probably isn't optimal.. But ofcourse spark can be changed with the PC software.

Maxed out injectors are at 100%, not 25%. I have a set of super charger injectors here. Those will go on to see if we can get it working with the ECU. Think it should be pretty close.

Mark

OAKMERE

Markv

A member on here (Yello) got a set of aftermarket injectors working on a standard ecu with no EML or remap so this could be an option for those starting to run lean if you can't get the SC injectors working.

Any approximate costs on the software??

Cheers Oakmere

si_c1978

i also am pretty keen to get my hands on this stuff! giiza shout when you know cheers

slindborg

I predict many melted engines with this software in the wrong hands lol

si_c1978

yeah probably csh.. but nothing ventured nothing gained!(i certainly won't be moving me rev limiter) ,
and it gives me an excuse to get the mrs to let me buy a z20let or net!

markv

That is one of the issue's.. The speedsters that are running over here now don't have any PC software to control it a.t.m. So basically it is a custom remap as it is now. I have no idea if/when Peter will release it with PC software commercially. Risk of doing serious damage to the engine if you don't know what you are doing is certainly there, so liability is certainly an issue..

Mark

si_c1978

we have quite a bizarre village garage at tipton who specialise in rolling road tuning,
i would most likely get them to do it as ive just found out when i spoke to them today, you can turn up with your own software for £45 an hour :mrgreen:

exmantaa

markv said:
That is one of the issue's.. The speedsters that are running over here now don't have any PC software to control it a.t.m. So basically it is a custom remap as it is now. I have no idea if/when Peter will release it with PC software commercially. Risk of doing serious damage to the engine if you don't know what you are doing is certainly there, so liability is certainly an issue..

Mark

Mark,

I know the current remaps are tested by you and some others, but when you say liability might an issue when people will be able to change their own mapping with the future control software (I would say that in this case they are responsible for their own actions), then what about the current remap sessions that were done to other people's cars? I can imagine that in this case liability can be an issue as the people pay "the tuner" for a new, reliable and safe engine mapping...
notsure.gif

slindborg

no liability issues AT ALL!!!!

Just think how few aftermarket ecu manufacturers there would be if every retard who didnt know wtf they were doing claimed it was the ecu's fault and then sued...
Things like this are "tools" and as such are the users responsability etc

I was more making the somewhat overly keen amongst us who may apper to have little clue as to how combustion works, aware of the potential pitfalls of touching yer calibration (thats map to may of you lol)

si_c1978

i personally don't tend to undertake work without my mate or father in-law as they are both pretty clued up and, like i said i would probably get tipton garage to do it anyhoo.

markv

I don't know how this is going to work out. At least one point is that the ECU's need to be programmed by Peter himself. So logistically that would mean sending ECU by mail or selling extra ECU's or something. Don't know about the liablity issue or how he has handled that with the current cars. One thing is for sure, for people abroad it is going to be more complex, and will really need the PC software if they want to actually callibrate the ECU..

I really hope it is going to work out, because it is such a neat solution. No wiring problems, just upgrade the software, connect a PC to the OBD connector and go 😉

Mark

daaaaavek

regarding programming the ECU for the first time, is that just a simple matter of uploading Peter's custom firmware via a SPI028 or something .. ?

markv

No, it takes more then that. After the software is uploaded it won't do anything (not even run the engine). It has to be unlocked and setup for the specific car, which has to be done by Peter.

Mark

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