MS3 Flex Fuel
When using Flex Fuel blending with Fuel Table Switch OFF in the Table Switching/Duel Fuel menu does Blend Curve (8) act as a global fuel multiplier?
Looking back through the way I had it setup I can simplify the way I currently have things configured and not use two VE tables |
IMO you want to use 2 tables as you should have different targets depending on the fuel you're using.
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Originally Posted by phil21191
(Post 1536726)
When using Flex Fuel blending with Fuel Table Switch OFF in the Table Switching/Duel Fuel menu does Blend Curve (8) act as a global fuel multiplier?s
It's important to set your ethanol baseline properly using this method too - else you can run lean on pump gas. I used an ethanol test kit to verify the fuel coming out of the rail matched what my flex fuel sensor was reading. |
Originally Posted by SpartanSV
(Post 1536729)
IMO you want to use 2 tables as you should have different targets depending on the fuel you're using.
Originally Posted by cpierr03
(Post 1536735)
While not ideal, yes. You can adjust the percentages and it will change the multiplication table accordingly.
It's important to set your ethanol baseline properly using this method too - else you can run lean on pump gas. I used an ethanol test kit to verify the fuel coming out of the rail matched what my flex fuel sensor was reading. |
Originally Posted by phil21191
(Post 1536848)
E85 price and availability in the UK is poor, I'm using Methanol it with Methanol. There is zero difference in power or the amount of ignition between 0.70 and 0.85 lambda so I target the same on pump fuel as methanol
/Thread |
More to the point, you need different fuel multipliers for low load cruise vs high load power settings.
This is a bad thread for bad ideas. |
Originally Posted by SpartanSV
(Post 1536729)
IMO you want to use 2 tables as you should have different targets depending on the fuel you're using.
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Originally Posted by thebigtuna
(Post 1536868)
Could you clarify what you mean? I was under the assumption you still target the same afr but the required fuel will just be more. Am I wrong in this understanding?
The same thing applies for ignition timing. On pump gas you'll run less timing to avoid knock. On e85, race gas, etc you'll no longer be limited by knock. You can run whatever timing gives the most power. That's why you want 2 different fuel tables and 2 different ignition tables with blending. |
Thank you for that explanation! I've been targeting 11.8 at 14 lbs of boost on 91. I realistically hit 11.4 and call it good. Im sure I could pick up more power but I'd rather pick up power with boost than timing. I wish I had e85 as readily available as I used to.
Sorry for the derail |
Originally Posted by Savington
(Post 1536865)
More to the point, you need different fuel multipliers for low load cruise vs high load power settings.
This is a bad thread for bad ideas. |
Originally Posted by phil21191
(Post 1536887)
The answer is carry on the way i have been by blending two VE tables then (As well as boost and ignition)
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