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AU ECU and Boost 

 

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 Post subject: AU ECU and Boost
Posted: Mon Mar 31, 2008 11:39 am 
Tyre Shredder
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Age: 62

Posts: 373

Joined: 9th Feb 2006

Ride: AU Wagon

Location: Newcastle
NSW, Australia

This discussion comes from a thread discussing boost on an EF. As my post below caught the eye of another AU owner, I've moved it here to avoid hijacking the other thread.
{USERNAME} wrote:
the speed density eec does
not have the capacity to deal with positive pressure above only 2 lbs.
It's strategy cannot unfortunately be changed.

What you say is correct, up to a point. That point is the end of EL production. For the AU Ford changed from a digital separate MAP sensor to an analogue one integrated with the IAT. The MAP signal on AU's on is therefore a voltage nominally between 0 and +5V, though typically between +0.2V and +4.8V.

What this means for AU and later models, is that the ECU can be made to "read boost" by the simple expedient of wiring in an aftermarket 2, 3, or 5-bar analogue MAP sensor in place of the pressure (vacuum) signal from the stock TMAP, and rescaling load-dependent variables to suit, using tuning tools such as Advantage or Sniper.

I realise most of the conventional wisdom relates to the E-series, so this is not of much help in that regard. But it seems to be a little-known fact that the AU differs from the E-series in this critical area. An AU owner reading E-series discussions would form the mistaken impression that to boost his engine, he'd need to fork out for an aftermarket ECU.

 

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Posted: Wed Apr 02, 2008 8:16 pm 
Oompa Loompa
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Age: 34

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Joined: 27th Jul 2006

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Ride: BF XR6T

Location: Hervey Bay & Brisbane
QLD, Australia

nice info could help me alot :wink: can you please explain it in a way a dummy like me can understand it :lol: im good with engines but not electronics :oops:

Matt

 

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