I don't think i've lost or gained any HP by doing this mod but I did notice more miles to the tank as well, we should dyno test this, but I think its simply a myth because in post he moded his A4 to think its a A6 and he said it felt like crap. So I really don't believe there is any hidden power behind this mod but simply a more livlier drive for us 2.8 drivers.

 

"About 2 years ago, on the A4 forum, someone posted that his dealer tech told him that if you recode your A4 2.8 ECU to think it's in an A6, it would 'unlock' the mystery 10 hp that the A6 has over the A4." Kris Hansen

Here is where I got the 10hp belief from. If you recode the A4 to think it's an A6 you gain 10, then telling an A6 it's an A4 you should lose 10.

I can't say I have noticed any increase or decrease in power. I can say the car seems to accelerate a little faster and I seem to be getting a little better gas mileage. I will say thanks to Asianicestyles cause if this does really save me some gas I owe you one for bringing Kris's thread to my attention.

 

Jeff...did you do this mod on the 27th when this thread started? or when exactly did you do it?...Because if you just mod the engine and you can already see a 2 mpg increase then I want to give this a try. Also, if you see any clear disadvantages in the next couple of daysplease post...I will def keep an eye on this thread...thanks...

 

I did it maybe a week or so ago. Here is a link to the original audiforums.com thread about this. I changed mine I think a few days after reading it.

https://www.audiforums.com/m_857261/.../tm.htm#859272


Oh, fwiw I am constantly being nagged by my partner to give the car gas. I used to average 22 back and forth to work, now I average 24. But now that gas prices have risen I can't say my driving habits haven't changed and are causing the 2mpg increase in mileage. I used to hate that the tip in for the throttle was so jumpy, now it seems more linear. I like that I can take off smoothly, before it felt like a dodge product in its attempt to artificially make the car feel powerful.

who knows, this could all be in my head (wouldn't be the first time).

 

24 mpg? How fast or rather slow do you drive? I only manage about 17 mpg combined.

Anyways, yes thanks to Asianicestyles... I just did the recode to my car a few days ago, and it does seem more peppier. I haven't gone through a tank of gas yet to see if there was any mileage increase or not, but I am happy one way or the other.

 

Hey thanks guys, Its taken me a couple of days because my computer has been having problems. But as soon as I can ill recode my engine.

Thanks!

 

Do i need to purchase the retail vag-com? or can i just use the free one. Also what adapter should i buy from ross-tech?

Thanks a lot guys!

 

Awesome...I want my engine to think it's a 4.2 S4 with 350 hp and a 6 speed transmission....what's the code for that?

 

No retail vag-com cable and software needed. I have a cable from ebay and used their shareware version.

 

One more thing, Do I have to buy a cable online or does like bestbuy or someplace like that carry it. And where is the connecter located on a 2000 Audi A6?

Thanks again dudes!