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Author Topic: 018 CB ESKONF - can someone please check  (Read 19211 times)
littco
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« Reply #15 on: August 04, 2013, 03:35:57 AM »

I have a EGT probe thats in the downpipe about 2" from the flange that bolts onto the turbo.

What happens with the part throttle/load fuelling?     Is that ok even without altering any of the tables that are lower down in lamfa.....all part load will be lambda 1??   I guess the ECU is pretty clever in altering fuelling in that area.  Is that calculated off the MAF readings and lambda?

Thanks



Apart from the obvious, lamfa is changed to keep egts in check .. At part throttle egts aren't really an issue and if they then are going to be sustained so having bts there as a backup is really all you need..

Having lamfa set for wot to run richer keeps control of the egt far better than running a stock lamfa and solely relying on bts to save your arse, far more control...

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carsey
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« Reply #16 on: August 04, 2013, 12:45:58 PM »

I kind if get it lol.

So what happens with the part load fuelling?   I can understand having a AFR of around 12 for the WOT runs but its the part throttle im struggling to grasp at the moment.
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phila_dot
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« Reply #17 on: August 04, 2013, 04:13:44 PM »

Part throttle cruising?

You want lambda 1
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carsey
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« Reply #18 on: August 04, 2013, 05:27:22 PM »

Yeah and partial acceleration but not slamming your foot down haha.

Why is there no lower AFR on partial throttle?  Is it something with the closed loop when you have full throttle and anything other uses MAF readings to calculate fuelling?

Sorry for all the questions Wink
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nyet
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« Reply #19 on: August 04, 2013, 08:30:11 PM »

Yeah and partial acceleration but not slamming your foot down haha.

Why is there no lower AFR on partial throttle?  Is it something with the closed loop when you have full throttle and anything other uses MAF readings to calculate fuelling?

Sorry for all the questions Wink

:/

http://s4wiki.com/wiki/Tuning#Open_loop_AFR
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carsey
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« Reply #20 on: August 05, 2013, 06:14:09 AM »


Cheers man.   Got the two loops the wrong way round but seems like I have my head round it all now.

Partial cruise it uses the MAF
WOT run it'll use the richest fuelling map
If EGT get too warm itll switch to the BTS map to cool things down.

Gotta love learning haha
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