[A4] Do you want to

Rocky Mullin caliban at sharon.net
Fri Jun 17 20:20:23 EDT 2005

	i have a similar setup, but it cost more.  basically i wanted to
have my stock ECU never be modded, so i could bring a "stock" car to the
dealer and not worry about warranty issues.  my chip is in a second ECU.
it was $1100 at the time, instead of $700, but it's been well worth it.

At 8:17 PM -0400 6/17/05, Phil Yee wrote:
>I always wanted my A4 chip on a socket, mainly for purposes of 
>troubleshooting when a problem came up.  I recently ordered a 
>handful of parts for this modification.  Here's how it went.  On the 
>ECU, I de-soldered the performance chip (I understand some earlier 
>A4's come with sockets already).  I soldered header sockets (a strip 
>of female plugs with surface mount feet) onto the ECU board.  Then I 
>changed the legs on the performance chip, so that the chip would 
>have "fresh" legs (never solder).  My chip was a small pcb with a 
>few components on there that already used header pins to attach to 
>the ECU.  The performance chip was now ready to install into the 
>header socket.  With the stock chip, I used some more "fresh" legs, 
>and assembled them thru bare pcb (Vector board, .050 spacing), and 
>voila stock chip on a pcb that fits into the socket.  Now I can 
>switch back and forth easy as pie.  I just thought some others might 
>be interested in this modification.  Sweet freedom for less
>than $15.
>Disclaimer: Proceed at your own risk.  If you do not know how to 
>solder SMT (surface mount technology) then I would not recommend 
>that you try this.  I did this to my 2001 car, and if your 2005 $40k 
>car dies, you're on your own.  If you ruin your $500 chip, or your 
>$900 ECU, then you're on your own too.  If you don't solder 
>properly, you're on your own.  You assume all responsibility.  Good 
>Parts from DigiKey
>V1140-ND - PC Board .05 Space FR4 4.0x6.5
>ED1150-ND - Conn Socket .207 50pos .050 SMT
>ED8250-ND - Conn Strip Header 50pos .050
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  Rocky Mullin 


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