28-08-2014, 08:01 AM
15 - 16 at cruise is fine, it's saving you some fuel in fact.
Much leaner and you might start to notice a slight juddering, as it begins to miss a little, but nothing to worry about other than an irritation.
Like Niall says, so long as under higher load conditions it gets down into the 12's, it will be fine. It's very easy to map more fuel in if you are concerned about anywhere specifically.
Are you running wideband feedback to the ECU? That can be useful for cruising conditions as you can get it to hold the afr bang on 14.7, keep it smooth and not use excessive fuel.
Bear in mind that most engines like to run a little rich at idle, it helps keep to smooth and also stops it popping back up the trumpets. I like 13.8-14:1 at idle to keep it nice.
JP
Much leaner and you might start to notice a slight juddering, as it begins to miss a little, but nothing to worry about other than an irritation.
Like Niall says, so long as under higher load conditions it gets down into the 12's, it will be fine. It's very easy to map more fuel in if you are concerned about anywhere specifically.
Are you running wideband feedback to the ECU? That can be useful for cruising conditions as you can get it to hold the afr bang on 14.7, keep it smooth and not use excessive fuel.
Bear in mind that most engines like to run a little rich at idle, it helps keep to smooth and also stops it popping back up the trumpets. I like 13.8-14:1 at idle to keep it nice.
JP
JP