Scangauge settings

[mcrews]

LOAD & IGN
can be used if you are running a different octane and what to see the result or effect.

[MPGranger]

Thanks for the input guys. Is my scangauge just not calibrated then? I see 99 LOD very often, so right now when I'm in my pulse phase I try for low 90's. I was reading up on BSFC last night and now I want to try to find the chart for my truck but have had no luck so far.

[CigaR007]

For some reason LOD never goes over 84-85 on my car.

[PaleMelanesian]

If you can't find a specific BSFC chart for your car (likely - most of us can't), just use the general ones to get a close approximation. Working from that is something like 95% as good as one specific to your car.

[MPGranger]

Where is the general BSFC map?

[CigaR007]

Originally Posted by MPGranger

Where is the general BSFC map?

You can find some here : Brake Specific Fuel Consumption (BSFC) Maps - EcoModder

[MPGranger]

OK, another stupid question: the islands are labeled with numbers in the hundreds like 370, but my LOD rating only goes to 99, so how do I convert the BSFC number to loading?

Also: If loading is percent of work the engine is presently capable of, how does my scangauge figure out how much work my engine can do?

[PaleMelanesian]

LOD is roughly tied to the vertical axis on the charts. Find the LOD and RPM combination that's on the top island and try to use that. It's usually somewhere around 2000 rpm and 75% load.

LOD is calculated from the quantity of air flowing through the engine. Only a certain amount of air can pump through a specific engine size, so you can compare what IS going through to what COULD go through. There's a specific ideal ratio of air to fuel for a good burn, so from that you can calculate how much fuel is going through.

[euromodder]

Originally Posted by MPGranger

OK, another stupid question: the islands are labeled with numbers in the hundreds like 370, but my LOD rating only goes to 99, so how do I convert the BSFC number to loading?

The numbers along the lines indicate fuel consumption - grams per kWh produced - so lower numbers are better.

The vertical line is engine Torque, which relates to engine loading.

Note this BSFC map is used for acceleration only.


Good BSFC doesn't mean best fuel consumption, it just means you're producing the most HP for the fuel being used.
Usually (during constant speed driving) you don't need as much HP, the BSFC is worse, but as you only need very few HP, your fuel consumption is good.

[MPGranger]

So I just need to eyeball the engine loading then?

Also, if I hit 99 LOD with the accelerator half depressed, what happens when I continue to press the pedal?