What really sucks is Hondata can't give the straight answer were looking for, which I can understand (but can still bitch about). Its been said its on the way, or that they're a kidnapped honda engineer away from solving the VIN number problem. However, if you read between the lines, the 05 5at reflash is about as real as unicorns. Fuck it, go get something else for your car.

 

You know, i think i am just gonna wait till the TSX coupe comes out. I'll F#$ken trade it in. Damn Hondata takes to long.

 

haha, then you risk having to honda make another different CPU encoding and then have to wait even longer. Then with our luck in having the 05s, you will have traded your car in for the coupe, then the 05AT chip would be out.

 

I have a feeling Kpro for the TSX is more likely before a 05AT reflash is done.

That would make it awfully tempting to mess with my internals. (My tranny doesn't count as "internals") I'd be all over the Hytech setup (RH/C/IM) that's being released for the RSX. Additionally, the newer Kpros have added functions where I can fix my speedo error from my RSX-S gears.

I always get jealous when reading the forums at clubrsx and k20a. Oh well, at least I have an idea what the K24A2 is capable of.

 

I love this engine, it's a real technological marvel, but not having the crucial ingredient to wring all the potential out of it is extremely frustrating. I love the TSX too...aside from being FWD it is my favorite car yet. Sadly, it'll probably be relegated to being my daily driver now that I'm getting a new "project" that I can actually do cool stuff with.

 

True dat. I might as well go get those ebay chips. Heck, at 5.99 and 20 hp guaranteed, gimme 99 of them for +1980 hp.

Its interesting that this is probably the most capable vehicle and the most advanced engine (RDX isn't out yet) in the Acura lineup and the support isn't as good as it should be in my estimation. Even 325s get more support. I guess its all a marketing decision.

 

seriously guys, I just want a K-Pro and a turbo....

I wonder whats up with that RDX turbo...hopefully we'll be able to retrofit it but then there's still the lack of ENGINE MANAGEMENT

 

Just called Hondata, Same answer " we're working on it ". I need a real answer, whats taking so long?

 

Maybe they're busy.

The TSX isn't exactly a huge market compared to something along the lines of the Civic Si.

 

The nerd in me keeps thinking about this statement regarding the number of trials needed to crack the 05 AT ECU. It's almost been like some riddle to me.

120 raised to the power 16 is the following

L = number of levels (or values) within factors = 120
k = number of factors within experiment = 16

So, using the classic 1-FAAT (1 factor at a time) technique, you need 18,400,000,000,000 trials for this experiment. However, I have serious doubts that Hondata ran a full factorial. They most likely ran a fractional factorial where they were able to reduce the number of levels(usually to only 2) and possible interactions.

With that said, they could've ran a two-level fractional factorial where only certain interactions were accounted for. This significantly reduced the amount of trials and resources needed to crack the ECU.



Sarcasm aside, 16 factors makes sense to me. I remember reading that the vtec crossover point was controlled in multiple values within the ECU code. How much more for fuel maps and other areas?

 

What Doug said sounds like there are 1.2e16 total combinations, not 120^16 (and you were 20 zeroes off of 120^16, too -- my calculator says 1.84e+33, not 13). Moreover if what they are trying to crack is some software interface (guess a 54-bit encryption key, for instance) rather than just get correct tuning parameters, then trying all of them may be the only option; sadly, this means that if it really takes one second to try a combination, it would take about 570 million years (by which time the market for a performance chip for the 2005 TSX may be rather limited). Even if the task is more soluble and what they need to do is figure out how the tuning parameters are encoded, fractional factoral analysis may not be a useful technique, since there may not be an obvious relationship between the value at a particular address and its effect.

 

LOL. I was hoping another nerd would chime in.

I had my doubts whether or not fractional factorial would work for Hondata for the reasons you stated. I also don't think they'd be able to reduce it to a 2-level factorial. Regardless, you've got to hand it to them for being able to crack any of the ECU's.

 

Since we're talking about engineering considerations, that counts as work, right?

I actually would have guessed that making a replacement ECU would be easier than reverse-engineering the software on the factory one enough to make a usable reflash -- if you make your own unit, all you need to do is figure out the protocol for the connected sensors and devices (much easier to do in general because you can figure each out independently) and then write your own software. Nobody does this, though, so presumably it's pretty easy to figure out the software in most cases

I wonder what the actual sticking point in the ECU they haven't gotten is. CGEarl said something about a VIN?

 

I think you're oversimplifying this. Making a complete plug and play ECU replacement that maintains all of the current functionality (guages, a/c, DBW) wouldn't be easy. There is a lot of complex logic within the ECU controlling the engine and telling it how to behave properly based on the status of many different sensors.

 

MoTeC makes universal ECU's that work with our car. Since it's a universal ECU, you'll lose all the creature comforts that are model-specific such as cruise control, VSA, HVAC, etc.

 

Just forget cracking the 2005 AT or reflashing ours for other setups. I'd rather just get an 04 RSX-S ECU and one of these babies:


We would still be able to have gauges, A/C, etc like you mentioned. This is the route they took for the 05/06 K-pro rather than messing around all over again. However, they still have to buy an 03/04 primary O2 sensor.

 

^^ Yeah...that would be hawt!

You also have to remove the drive by wire, right?

 

So with this everything in my car will work?

 

Is it possible to use the RSX-S ECU on TSX? Both engines are similar but not the same. If there's K-Pro avaliable, and the RSX-S can use it on TSX without the lose of all neccessary function such as A/C or guage, then it's a good investment.

 

The RSX K-Pro will control our engine, but you'll still lose your gauges, HVAC, cruise control, and VSA.

 

DAmn, thats to hardcore for me. I know the skunk2 TSX did this, and it pushing some good HP numbers.

 

i've been waiting on an ecu reflash for some time also. injen cai, dc sports header, and greddy evo2 exhaust ...

 

Bringing back an old thread but any news about Hondata flash for 2005 AT?

 

Man, i really feel bad for all the 05 5AT owners out there. I guess this means no 05 5AT s/c either until the ecu is cracked. wow.

 

still nothin huh?

 

i guess, we (05 AT owners) have to trade our cars to 06 tsx..

 

Its alrite, i'm spending my money else where rite now. i got really tired of waiting, but i'll be the first in line for this when it comes out tho. It comes out when it comes out, life goes on.

 

:sarcasm: Nice to see the 06 civic si get a reflash :sarcasm:

 

Guys, they know how much it is wanted, so when it comes out we will be the first to know. Posting about it repeatedly won't make it happen any sooner.

 

Ahh but why is it only the 05 AT reflash that is impossible to crack? Did they just get lucky with all other TSX, RSX, 2006 Si, etc. reflashes??

 

I believe for some reason, Acura coded the VIN number or something to that effect in the programming of the ECU fo the 05 AT TSX's.

 

Why in the hell would they decide to do that in JUST the 05 AT ECU's and not any other previous OR future ECU's. That is just plain strange to me.

 

To piss you off and punish you for getting an AT

 

Hahahah...yeah true.