MPG- give me some input please
#27
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I'm trying the best I can to get a better MPG, I don't see much improvement, even with low boost (>10psi) and 16:1 AFR cruise.
17.5MPG would be an achievement.
I noticed that my normal cruise is 60-70kpa that is a bit high, if I under stand correctly.
Anything I can try more or that is it with the current turbo combo ?
My current AFR:
17.5MPG would be an achievement.
I noticed that my normal cruise is 60-70kpa that is a bit high, if I under stand correctly.
Anything I can try more or that is it with the current turbo combo ?
My current AFR:
![](https://www.miataturbo.net/attachments/megasquirt-18/128087d1416683765-mpg-give-me-some-input-please-capture.png)
#29
Slowest Progress Ever
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I know you'd think leaning it out like that would better your fuel consumption, but perhaps you should post your spark/ all of you enrichments. I get 29mpg and no less than 24 when I am mad at life and take it out on my car for a week.
#30
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Log:
https://www.miataturbo.net/attachmen...4_18.25.32.rar
You can see that my cruise 2700-3200rpm is above 60kpa
https://www.miataturbo.net/attachmen...4_18.25.32.rar
You can see that my cruise 2700-3200rpm is above 60kpa
#38
Cpt. Slow
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Uh, but you don't use it's manifold, down pipe, engine, injectors, intake, exhaust, engine design, head design, ecu, weight, or ANYTHING else related to the Volvo.
You have a LOT to learn if you think you can compare the car you've taken your turbo from to your Miata for mileage comparisons.
You have a LOT to learn if you think you can compare the car you've taken your turbo from to your Miata for mileage comparisons.
#40
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When you go out shopping for a turbo one of the turbo specs are "supported" HP.
If I understand right: HP=air+fuel+spark.
The turbo HP spec is given without any consideration to your car/build.
The turbo HP spec is based upon the turbo capability of moving air, and for any given air volume you must apply a specific amount of fuel.
The air volume and fuel volume will be quite the same for any given HP on any car/build with the same turbo, this is way you can calculate your injector size without any consideration of the car/build.
There for I think it will be safe to say that for a specific HP output you can calculate the fuel amount that will be needed hence mileage.
Of course I'm talking rough numbers and just a rough estimation of mileage with a specific turbo - combined mileage - boost and no boost.
(Don't kill me)
If I understand right: HP=air+fuel+spark.
The turbo HP spec is given without any consideration to your car/build.
The turbo HP spec is based upon the turbo capability of moving air, and for any given air volume you must apply a specific amount of fuel.
The air volume and fuel volume will be quite the same for any given HP on any car/build with the same turbo, this is way you can calculate your injector size without any consideration of the car/build.
There for I think it will be safe to say that for a specific HP output you can calculate the fuel amount that will be needed hence mileage.
Of course I'm talking rough numbers and just a rough estimation of mileage with a specific turbo - combined mileage - boost and no boost.
(Don't kill me)