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Post by tachout on Oct 12, 2010 12:14:27 GMT -7
For those of you that can tune a FAST System here is a question
There are two tables Air Fuel Table that shows the AF Ratios
and
a Fuel table that is adjustable at a given point in the RPM Band.
When viewing the data log and there is a point where it is lean, or rich the Fuel Table is adjusted to either add fuel or take fuel away. Works great.
Now for the question.... How do you push the data to the AF Table? Once the car was tuned using the fuel table all ran great until you put it in close loop and then it ignores the Fuel Table and goes to the Air Fuel table. Just need to update the Air Fuel table with the adjusted numbers from the Fuel Table. How do I do this?
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Post by kyrosnick on Oct 12, 2010 12:33:22 GMT -7
Air fuel table is your target AFR during closed loop. Your fuel table is like your VE table for fuel vs rpm vs load. Two different tables for different things. The car will adjust the fuel trims/etc to try to hit the values in the air fuel table.
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Post by tachout on Oct 12, 2010 13:23:49 GMT -7
Thanks We will see how that works. The fuel table is set and it runs great, well until you put it into closed loop, where it only sees the AF table, and that is where we should have been adjusting all along. We will see how it goes.
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Post by kyrosnick on Oct 12, 2010 14:20:06 GMT -7
What do you have that can adjust when it goes to open/closed loop? Whats the difference look like between them? For example is it running mid 12s open loop then targeting mid 14s closed loop? The fuel trims and o2 sensor should dial in the closed loop as you drive it if the closed loop maps are dialed in properly.
Do you have a wideband?
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Post by tachout on Oct 12, 2010 14:47:45 GMT -7
The car does have a wide band. I will try to get a couple of screen shots when I get a chance to check out the car. It is my Bosses Porsche 911. He asked me a couple questions on tuning, and I thought everyone on here would be better to ask than me. Hopefully he will drive it in tomorrow and I can check out what he is talking about.
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Post by Crossfire84 on Oct 12, 2010 21:36:49 GMT -7
The car does have a wide band. I will try to get a couple of screen shots when I get a chance to check out the car. It is my Bosses Porsche 911. He asked me a couple questions on tuning, and I thought everyone on here would be better to ask than me. Hopefully he will drive it in tomorrow and I can check out what he is talking about. NOSVETTE HAS BEEN RUNNING THE F.A.S.T. SYSTEM FOR YEARS. GIVE JIM A CALL, HE OUGHT TO BE ABLE TO HELP YOU. RACE ON!!! JIM
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