Anybody know if a TS re-flashed ECU would be detectable by the dealer through the OBD port? Based on our Nor. Cal. dyno-day results it seems to provide some substantial (and quantifiable) benefits. However, I'm concerned about warantee issues if I ever had a major problem...

2004.5 G35 Sedan | Garnet Fire + Willow | 6MT | Z-Tube

 

When I had my MT replaced, my servicing dealer was really cool about my mod's and doing the warranty replacement. So, I quizzed him about the TC ECU mod, he said it would not matter since it would not be detectable by him, he said their computer system would not recognize it as having been modified.

"All that's necessary for the forces of evil to win in the world is for enough good men to do nothing.”
Edmund Burke

G35 6mt

 

Barry,

Technosquare swears that the unit will not appear any different from stock when the dealer checks it. I suppose if the dealer took a look at the values stored in there they could figure it out. Not sure if they'd actually dig that deep.

 

Cool! Based on your dyno results, this is definitely an UNDERRATED mod. I doubt a plenum, high-flow cats., etc. are going to get you more than 15 hp! Now if we could only get 93 octane here... Let us know what happens after your next TS update. It would be REALLY cool if TS could use one of the existing ECU inputs (how about the VDC switch?) to allow for manual switching of A/F and timing maps. They could make a build with more-or-less "stock" maps used in one switch position (maybe with VDC on for "normal" everyday driving), and another with more aggressive maps for "sport" driving. That way we could run 89 pump fuel for the daily commute, and switch to 91 + octane boost for the weekends (or dyno days)!!!

2004.5 G35 Sedan | Garnet Fire + Willow | 6MT | Z-Tube

 

I'll try to answer some of your questions ...




<blockquote><font class="small">In reply to:</font><hr>

I doubt a plenum, high-flow cats., etc. are going to get you more than 15 hp!

<hr></blockquote>I would tend to side with you prior to my own addition of the affore mentioned mods.

My recent post plenum dyno (here) and post test-pipes dyno (here) may open your eyes a bit. They sure opened mine ... wow

Don't be alarmed by what seems like largely inflated numbers ... these are Dyna Pack values, which do read approx. 10-15hp higher than the DynoJet on the average. None the less, the delta values between the baseline and post mods still stands uncorrected. It's also safe to say, if the rest of your exhuast is left stock (mostly for sedans) ... you're not likely to enjoy the same amount of gains I did. It looks like you're in a good position to do, however, with the Stillen TD exhaust already equipped ... if you do decide to keep em




<blockquote><font class="small">In reply to:</font><hr>

It would be REALLY cool if TS could use one of the existing ECU inputs (how about the VDC switch?) to allow for manual switching of A/F and timing maps.

<hr></blockquote>That would not be possible at this point in time. The ECU rom hasn't been decompiled at this time, or at least not release to those who do not need to know yet. For the time being, all that's been figured out is where the paricular hex values reside in memory, but no full understanding of the ECU logic and algorithms. So, until the software have been decompiled and studied ... no additional lines of code (for neato features) could be added.




<blockquote><font class="small">In reply to:</font><hr>

They could make a build with more-or-less "stock" maps used in one switch position (maybe with VDC on for "normal" everyday driving), and another with more aggressive maps for "sport" driving. That way we could run 89 pump fuel for the daily commute, and switch to 91 + octane boost for the weekends (or dyno days)!!!

<hr></blockquote>Our ECU already contain 3 different ignition maps for varying conditions (such as a bad tank of gas or a good tank of 100-octane gas). It is unkown to me how Tadashi makes use of the three different map, however. I never did get a chance to ask him that before he left for Japan

my .02


Clint (THX723)

 

Yikes - I totally misunderstood what TS is offering! I thought that they were somehow "authorized" by NISMO to provide ECU mods., and would thus have at least partial access to source code (maybe just the timing and A/F tables) to do a re-compile. MOPAR offers "performance" ECUs for most of their cars, for example. So, the question is why isn't NISMO willing to offer the same? I understand them not wanting to provide full source code to a 3rd party (lots if proprietary intellectual property there). OK, then the question is this: Is anybody building a "piggy-back" module to place inline between the crank position sensor and the ECU? Excuse my ignorance of how the VQ does things (I'm pretty familiar with how my Neon works and assume the VQ is similar). I'm guessing the ignition timing is derived from a sensor which measures crank position directly (off the timing chain?). If it works like other systems I've seen, it generates a pulse train which the ECU interprets to generate ignition coil pulses (and valve timing advance in our case). By modifying the crank timing pulses, pre-ECU, it is possible to "fool" the ECU into providing more timing advance. Once that's done, this in-line system could be made intelligent (allowing for a manually controlled "****", and multiple advance maps.). Clearly this can't take engine load into account like the ECU can (probably uses throttle position and derivative of rpm, and???). Also, I don't know how this would work with variable valve timing and the "throttle by wire" VQ. Anyway, if something like this box exists for the VQ motors, it might allow for more moderate gains than a full ECU re-flash, but also allow for more user control. Is there such and animal for our cars?

2004.5 G35 Sedan | Garnet Fire + Willow | 6MT | Z-Tube

 

Getting off tangent a bit, if the dealer can't detect a reflash that's great but would they be able to reflash it back to stock settings? My concern would be that if you took your car in with a problem and they hooked up the obd2 port and simply pressed a button to send all values back to factory settings to "clear things out" then that would be money down the drain.

 

Technosquare seems like a solid company to me. They've offered to reflash my ECU to get rid of the detonation problems I was having. I think they'd be willing to reflash you back if the dealer put you back at stock. That's just my opinion though. You'd have to call them to find out.

They're very prompt and courteous when I've called and walked in. It was $495.00 well spent.

 

Barry,

Put your exhaust on mods list. People might get too jaelous seeing 230whp with just a z-tube

***04 G35s 5AT/Sport***
***04 Volvo XC90 T6***

 

I just got mine back from TS on Wednesday and they put a two inch sticker on the back with a barcode and number. I carefully pealed it off and put int in a safe spot just in case. No other visible indications.

 

Havent got a chance to really drive it yet though. Cant wait.

www.nypokertour.com

 

To further elaborate on DHCrocks question... If you did take your TS ECU to the dealer and they did "reset" to factory specs., would you even know they'd done it? Is there any way you can tell that the TS re-mapping is in effect (other than going to a dyno)? I guess the rev. limit increase might be the only obvious sign?!?

2004.5 G35 Sedan | Garnet Fire + Willow | 6MT | Z-Tube

 

To my best knowledge ... the dealer's attempt to reflash over TS ECU will throw an error code. In other words, it's not possible to lose your hard earned TS program from the mentioned method. TS has carefully packaged the ECU with the correct checksum, so a Consult-II diagnostic routine on the ECU will not throw a flag.

I have the ECU reflash planned soon and will double check w. TS.


Clint (THX723)