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Old Mar 20, 2009 | 08:44 PM
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Bulldogger
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Joined: Oct 2007
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Default Re: How about one step at a time

[quote=waldig]Some will have noticed my diminished activity, well the front end got done and the adsorbitive front coating is now complete.

hood finished, bumper painted and back on. Photos to follow.
I have have been doing the electrical thing with my battery design, should have results in about a week if my designs work out.

Now the present:
The fuel. Injectors, nuclear fuel pumps, Ionic foam air filters, black light headlights...........Nothing is going to fix the fuel mixture issue...............NOw that is a strong statement.

The fuel map is a set of numbers that describe a curve controlling or administration the duration or open time of the injectors. It is correct some where, like having a broken watch, good twice a day........... The curve is approximately good and servicable for the most part but is not correct or accurate, its in the region of reasonable, butt just inthe 'hood'.

If you have more capacity added in the fuel pump or bigger injectors then the curve will allow more fuel EVERYWHERE. What we must do is add more here and less there and that VARIES with the DA, the boost, the humidity, fuel, your fuel map, and mods to your intake, exhaust, etc.

In my previous efforts I found that my cars fuel pump - pressure was flowing too little and I was going TOO lean , 17 to 1 lean above 20 psig. I then added controls to adjust the boost according to my A/F readings while I was driving and got closer to the 12-13 range. I ran out of control because with no additional fuel pressure I was too rich below 17PSIG and lean above 20 PSIG, cause my pump was too frisky below 17 PSIG, I could not pull back enough.

I now have a FPR to be added next month that is adjustable and tuneable with the application of vacuum or boost to change the fuel pressure down or up. I feel that the fuel pressure will be the way to control the F/A ratio --as the car needs it to CLOSE THE LOOP dynamically while your driving.

THis will be taken up next month after the light weight battery study is over. If Iam successful, then I believe that the car can be set up to give a specific F/A UNDER LOAD as you drive.

I have already proven that the fuel pressure if raised by less than 5 PSIG you can correct lean under boost to rich, though it is TOO much of a hammer, ie too big a change.

I am still working onthe design but have had lots of stuff besides cars thats slowing my progress, more light in the afternoon will assist.

Have a great weekend. WOODY


I'm pretty sure Wayne at LET told me you can scale the maps down to make larger injectors work. The larger injectors are 20% larger and are supposedly still within the calibration limits of the ECU.
 
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