yeah pretty much, it clearly needs a tune
and maybe i'm a little paranoid
hahahaha

yes you are

Drive it until the fuel lamp comes on (10 liters remaining) and completely fill it. then check km traveled when the lamp comes on again.

The gauge has 2 senders, 1 in each side of the tank, the system averages the two level readings and displays it on the gauge...... It's never very accurate.

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^^^WHS... also note how many litres it takes to fill it right up, then you can work out your L/km

So if I put an atmo bov on, i'm gonna lose 200km per tank? YYEEEEEEOUCH!

All for a bit of wanky *pssshhhh*... no thanks

20km between atmo and recirc bov's.....less with a decent tune.

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Is this a fact Rossco? You've measured it?

The bov does nothing to your tune. It makes the air slightly more rich for about 2 seconds as it vents some of the measured air. Once your driving the vacuum will keep it closed.

I was getting a about 30-40km less a tank with a atmo bov, that was after a re-tune.


Sent from my iPhone using Tapatalk

hybrids are always a good compromise, even though it's been discussed to death

Yes fact...For my car, set up & tune. 450km atmo ssqv & 470km plumbed back (average fuel light to fuel light, Km recorded for fuel card).

You can trim a heap of fuel out of the low load mid-range rpm fueling points to offset the atmo venting bov induced a no load rich spot = fuel savings & crisper on/off throttle response.

My datalogit logs show a momentary 20% airflow surge (looks like a voltage spike) of the maf output voltage when the bov vents atmospherically. You never pass through these point under any load so it is safe to pull fuel from these spots.

The yellow area in my fuel map rpm N12-15 is where I've pulled fuel out in my map to reduce the rich spot.

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