So, it appears mail order box tunes are the norm for these. Does anybody know the software generally used to tune the engine ecu on jags or can someone point me to some .hex/definitions? I come from a platform that has pretty robust, freely available tuning support and it looks like jag tuning is not very open source at all.

 

Likely the open source would work if anyone did some (open!) work but apparently no-one has.

There is almost no paid-for, either. ECU Group make claims but seems no-one has taken them up and posted about it.

If you can find a way to pick apart the files (a map editor would be best) from IDS/SDD then any jag tool (such as IDS/SDD via a Mongoose JLR) will reflash the PCM.

The actual files are present on the IDS DVDs (at least up to some IDS version).

The (STR etc) PCM is a twin-cpu version of the 32-bit Denso.

The PCM I took apart has (twin) SH7055 Renesas (formerly Hitachi) chips. It may be that the later PCMs use later SH705x chips but I've not had my hands on one.

It's not clear whether any paid-for "tuner" actually has a proper means of tuning i.e. map editor etc. Probably they don't.

There are previous threads about this but all went nowhere. I believe someone offered to be a test mule for ECU but got nowhere.

Other options you might check out are www.viezu.com (don't appear to be credible but I may be wrong), and CMDflash (ditto).

A couple of UK/German firms have claims about tuning but I would be very suspicious and the prices are scary.

BTW, the early cars (pre-2003) and the diesel use different chips.

 

which S-type are you trying tune? yr and model,

Seems like the only available option is the ECU-Tuning-Group tune, which is just repackaged tune from a european source I believe,

There are aftermarket piggy-back tuning options out there, that work around intercepting the MAF signal, that may be able to work, but no one has tried yet.

Personally, I've used MAP-ECU (2 and 3) over the years on other MAF equipped cars to great sucess; not sure if it would work on the jag, but something I would look into,

 

Maf signal modification would work ala the apex-i super afc and other maf interrupt devices but they don't allow for timing control, injector scaling and modification to other ecu controlled functions, just need some definition files so we can possibly tune them with Tuner Pro. I'll be looking into this...

 

Well I have never heard of the MAPECU before... I may have to give it a look.

 

We still don't know the year and model you are working on?
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MAP-ECU runs one of two ways, maf intercept and maf elimination, and both are supplemented by the MAP-ECUs own internal map sensor,

Simpler to run MAF intercept mode, where MAF stays as is, and you use map-ecu to +/- fuel trim across a rpm/load axis,


MAF elimination mode removes your MAF entirely, and using its internal MAP sensor it will now function as your existed MAF, not much more wiring, but requires more extensive tuning nearly from scratch,
Consider how creative your 'intake' could be at this point, combined with ability to tune, could really help max out the last bit out of the eaton,

MAP-ECU is pretty sophisticated, it is laptop programmable and it can get away with stuff you could only have with a total standalone ecu,

You can swap injectors to larger size, and the map ecu would make the correction, as well as timing control, a/f input, boost control, launch control, high speed datalogging, real time editing, etc

really good product, ive done maf elimination with it on several builds,


although for our cars, probably best to just use MAF intercept mode, and tune the factory WOT AFR's from 10.9 to 11.8 and see what gains are to be had...

I've talked to map-ecu, and they said based on an '03 XKR on file it ought to work, but really, with our ford 0-5V MAF, there is NO REASON it wouldn't work nicely,

The only thing I am not sure about, is the ignition control, i'm not sure how the igniter/coil module is integrated on these cars,

But it's likely like in any other car, and I wouldn't be surprised if you could deploy 90% of MAP-ECU's features rather easily on an STR,

 

If you flow more air the stock PCM will add fuel. But going leaner will need something else - maybe the above device. No-one seems to have tried it with an S-Type.

 

Well the optimum solution would be the definition files for the factory ROM so fuel mapping, timing and other things could be controlled by flashing the factory ecu's ROM files like we use on the Lan Evos. But that's going to take a bit of work.
I will be letting you all know how this MAP-ECU goes, I may also give the Apex-i AFC-Neo a shot as it works on the same general principals as the MAP-ECU but it's not as sophisticated.
Either of three ways this is ending in full tuning ability of the STR's engine management...I don't like "box" tunes.

 

Good luck! Your not the first to try!
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I thought our S type R engines were very similar to the mustang. Would the performance modules for them work?
I am also looking for a performance module or programmer, and not having much luck.
I bought this car because I figured the ford engine would have plenty of performance items available,,,,, NOT

 

It's best not to think it's a Ford engine, that way you don't go down blind alleys. I don't think it's in any Mustang, either.

 

There's zero percent Ford in the V8 engines, other than design money. Nothing in common with the Mustang engine of the same era.

 

The supercharger is shared with the 03-04 SVT Cobra...

 

Ah, OK.

I always viewed it almost like as an add-on accessory like an alternator, that might be used on other cars from other OEMs.

 

I would agree with that assessment, as the new TVS supercharger is used on all the new Jag "R" models, the CTS-V, Corvette ZR-1, and a few others.

 

Hey Quartz, not to change the subject, but how does your exhaust sound, probably a stupid question but I have also contemplated deleting the muffs. Any similar to the loud Mustangs ?

Also, do you get any surging at low speeds with the #3 pulley?

 

I did get some surging when its cold, but it was tranny programming. After a day at the road course the transmission adapted/relearned and stopped surging.

I have done a bit more than the muffler delete. I also have high-flow cats, a non-resonated x-pipe and high-flow resonators. It is pretty loud; I have a few videos of it from inside and outside the car on my youtube profile. A few of the older videos are from before or partway to my current exhaust setup, anything from the Camaro SS video and newer should be accurate.

 

Sounds good, Lots to think about now.

 

Does anyone know if the SVO Mustang Eaton supercharger pulleys will work on the STR ?
Where is the best deal on a 3 lbs. pulley.