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Originally Posted by Darius
Nothing is wrong with 14-15:1 AFR. I meant to say that the cleanest burn emissions wise (least pollutive to the environment) occurs at stoichiometric ratio of 14.7:1 AFR.
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I understand, but we're talking about fuel economy, not emissions.
Quote:
Originally Posted by Darius
You will obviously get better fuel economy if you run higher AFRs (i.e.17:1 at idle), but you also run the risk of getting knock and high EGTs. That is why you need to tune for those things when dialing in your fuel and ignition maps. If you have a standalone, obviously.
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So what should the ideal AFR be?
I try to tune the cruise profile of my carb to be around 14-15 and the power profile around 12-13.
Quote:
Originally Posted by Darius
I agree that blow-thru is the way to go but for some reason it reads a higher air flow rate (higher voltage) than if it is a draw-thru on the same setup. So you max the MAFS out at a lower hp than with a draw-thru installation on the same setup. Plus, plastic MAFS housings on 25 lbs of boost don't tend to hold up to the heat and pressure. They either crack or you tighten the couplers down on them so hard that they crack anyways.
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Question. Is it safe to run 25 lbs on the MAFS?