Flex fuel boost increase how to?

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jasaircraft
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Joined: Mon Jul 07, 2008 5:45 pm

Flex fuel boost increase how to?

Post by jasaircraft »

Hi,
So i want to increase boost duty in proportion to ethanol content.
I have read the manuals and cand find a clear explanation of how to achieve this.
Can someone please school me on how to do this?
Im using the basic flex fuel setup. Open loop boost control.

My plan was that i could have my normal boost table1 to achieve 15psi, toggle switch for table2 and get 20psi. And in any of the switch position have the duty addition depending on alcohol content.
ie. if on table1 15psi plus whatever the alcohol content would represent in boost duty increase.
that way i could maybe achieve 30psi on more than e50
nathaninwa
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Joined: Tue Sep 14, 2004 4:17 pm
Location: Aberdeen, Wa

Re: Flex fuel boost increase how to?

Post by nathaninwa »

You can't do that. Ethanol uses the blend curve, which is a percentage between table 1 and table 2
Volvo 940, 2jzge, MS3Pro, daily
240Z, 2JZ, MS3Pro boost control
jasaircraft
Super MS/Extra'er
Posts: 902
Joined: Mon Jul 07, 2008 5:45 pm

Re: Flex fuel boost increase how to?

Post by jasaircraft »

d***..
so its either the low meth content table ie table1(lets say15psi) or table2 with the highest meth content(say30psi) and anything in between but not switchable with a toggle switch?

would be nice to add that switchable feature right? or the user would have to add enough alcohol to reach the boost he wants.
nathaninwa
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Posts: 2637
Joined: Tue Sep 14, 2004 4:17 pm
Location: Aberdeen, Wa

Re: Flex fuel boost increase how to?

Post by nathaninwa »

Or maybe put the boost tables on a detended switch and just dial in the boost you want between the two the table limits
Volvo 940, 2jzge, MS3Pro, daily
240Z, 2JZ, MS3Pro boost control
jasaircraft
Super MS/Extra'er
Posts: 902
Joined: Mon Jul 07, 2008 5:45 pm

Re: Flex fuel boost increase how to?

Post by jasaircraft »

I think we are just going to stay with the table1 to table2 blending and forget the switch.
About the overboost i suppose it can also be blenden between two values? i see there is a box there apparently for that purpose.
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