[urq] Knock sensor on a WX..?

[fdekat]

> 
> Once you're started down the path to replacing the pressure transducer the
> slope gets slippery fast!  Why stop with only a 2 bar transducer?  You can
> get integrated sensors that go to 3 bar and beyond, and the RDH repository
> contains plenty of information that would allow one to rescale their maps
> to support operation in that regime ... 

True enough!  But If I were going to head that way, I'd think about finding a
steeper slope than the MAC 02. As you point out, all it can control is
timing. Not much fun in *that*, is there?  :-)


> The other comment ... I think it was made before ... when you see overboost
> there's only one place you need to look ... the wastegate.  The MAC-02 has
> no way to control manifold pressure ... it just uses it to determine the
> ignition timing and such. 
  
Yes, something odd going on there. Are you *sure* that you do have overboost
cutout, or has that perhaps been messed with?  (Hardwire the fuel pump relay,
or 'zener mod' in the ECU?)


> ... I'd be interested in hearing how one got the knock sensor to bolt on
> the side of the WX engine! 

In my case, it was quite easy! Somewhere in the urq's life before I got it,
someone had swapped in a MC motor, but had left it  still running the MAC02
ECU. The knock sensor was still in place on the block, with the wiring cut
off..! The decision to switch to MAC 11 was easy, as I had all the bits
needed to convert.

Regards, 

+frank de kat+