11-01-2005, 09:21 PM | #1 |
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Fuel Equilibrium Intake Surface FN1321
Here is how the GUFB book states: Transient Fuel is variously referred to as manifold wall wetting, puddling, filling, fuel film condensation/evaporation.
I personally have found the MEFTRA scalar more valuable so far. This is the Equilibrium Accel multiplier. It allows for riching the mixture during accel. The MEFTRD scalar is the Deccel Equilibrium multiplier. This one helps in the decel popping which is caused by to much fuel in the decel. I am starting to play with the Equilibrium table to fine tune the Accel at certain loads. Larger numbers I believe are to richen the mixture. You just have to keep in mind that by raising the number you will richen the mixture on accel and lean the mixture on decel. I am still playing with the table to prove what I am seeing. Another key point for those of you that have modified the Load scale (normalizers FN071), this will affect the Equilibrium tables and throw it way out of whack. When I changed my load scale (FN071) the car ran completley different during non steady throttle states. I then went to the Equilibrium table and moved the numbers around to mimic the factory table and the car drove much better. So for those of you that do not have access the the Equilibrium tables, I would not recommend changing function 071.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
11-02-2005, 02:57 AM | #2 |
3v's are slow
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Re: Fuel Equilibrium Intake Surface FN1321
Thanks Clint
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11-02-2005, 07:04 AM | #3 |
5.0 Block/Walnut Cracker
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Re: Fuel Equilibrium Intake Surface FN1321
One thing to add is that this and the manifold volume, air charge WOT multiplier on newer strategies can have a huge effect on cars that run a blower etc......in a street/strip application.
For example the air charge WOT multiplier on the '03 Mach 1 strategy seems to work best at 1.9 with a blown setup. The stock setting is "1.1001". While the stock setting for the manifold volume on the '03 Mach 1 is set at "0" in the stock calibration. IMHO the manifold volume is used more in the older strategies '96-'98,'99 maybe?
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'14 Dodge Challenger SRT8 392 6-speed |
11-02-2005, 08:29 AM | #4 |
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Re: Fuel Equilibrium Intake Surface FN1321
The Equilibrium Accel multiplier is:
X3Z= 1.5 A9L= 1.203 Both of the Equilibrium deccel multipliers are set to 1.0 The Equilibrium tables are also different. Dale have you messed with the Equilibrium table? If so which way is rich and lean? I have been playing with small numbers so that I do not screw things up. It looks as if I will need to make bigger steps.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
11-02-2005, 08:45 AM | #5 |
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Re: Fuel Equilibrium Intake Surface FN1321
Clint,
I have played with them on the EEC-IV, but I have been so busy with some of the EEC-V stuff lately that I am brain dead.... I will have to look at my notebook later to see what I wrote down. Maybe > In the table Lower numbers = less Higher numbers = more But do not quote me on that as I am not sure at the moment, brain dead you know. I will try to take a look tonight if I have time.
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'14 Dodge Challenger SRT8 392 6-speed |
11-02-2005, 09:03 AM | #6 |
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Re: Fuel Equilibrium Intake Surface FN1321
Cint,
One other thing on the A9* eec's take a look at the intake filling HG. I think it is set at 1.999. Do not remember what effect if any that this had......
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'14 Dodge Challenger SRT8 392 6-speed |
11-02-2005, 01:55 PM | #7 |
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Re: Fuel Equilibrium Intake Surface FN1321
Clint,
Thanks for the input. However i'm a little confused because our injectors are sitting very close to the intake valve and there isn't much intake tract do cause this effect. I think it would be way different with TB injection, but I find it hard to believe that it would be more than a fairly low level adjustment? BTW, I have changed FN071, 072A and 085. With timing reduction I have much improved my problem and now only have a slight bucking/misfiring issue between 1400-1500 RPM in second gear. Don |
11-02-2005, 03:05 PM | #8 |
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Re: Fuel Equilibrium Intake Surface FN1321
You have to remember that when the intake valve closes the injector may still be spraying. During this time one of the other cylinders is drawing fuel in. This vacuum caused by the other cylinder will cause the peddled fuel in the cylinder with the valve closed to go back up the intake. Of course this only happens at high RPM and injector PW.
Also it does not only apply to fuel. Think about the moisture in the air. When the moisture is pulled out the air becomes denser.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
11-02-2005, 08:52 PM | #9 |
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Re: Fuel Equilibrium Intake Surface FN1321
Clint,
I'm pretty sure my issue is a steady state one because pulling timing from the tables seems to be working. Transient wise I get good response. On my setup I know the injectors shutoff before the intake valve closes and I also wait for the exhaust valve to close before injecting. BTW, I think you meant less dense with lower moisture content? Don |
11-03-2005, 12:47 AM | #10 |
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Re: Fuel Equilibrium Intake Surface FN1321
Yep Yep
If you are only seeing the problem at steady state then this will not apply to you.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
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