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Author Topic: Fueling Issues - 1.8T ME7.5  (Read 20506 times)
nokiafix
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« Reply #15 on: January 18, 2012, 02:39:31 AM »

You will have to start from scratch as the CR on the AMK/BAM engines is lower than the AUQ and can cope with higher advance and boost.  Your best bet is log your timing, CF, rpm and load and work on the stock timing maps and pull the advance out where its pulling and add it where you needed it.  a quick way to see what going on and to get and idea of how much timning you need to pull out is via unisettings/lemmiwinks.

Its hard to run a lot of timimg from the k04-001 with stock manifold, you really need to port the collector and runner number 3 to help with flow first.

Your fine running the stock maf with just KTKTE corrected.

With WMI, ported exhaust manifold, forge actuator with blue spring and the compressor wheel from the k04-023 the k04-001 will flow enough for 290bhp, I ran this set up with 75hp of nos and managed a 12.5s at santa pod last summer.

I also fitted the K03s cold side to the 001 and managed 275bhp 334lbft.. Wink

The k04-001 maxed out will flow 213gs around 265bhp 13.89s 1/4 mile, but you need to have the timing bang on and the exhaust flow the best you can
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kenmac
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« Reply #16 on: January 18, 2012, 10:42:39 PM »

You will have to start from scratch as the CR on the AMK/BAM engines is lower than the AUQ and can cope with higher advance and boost.  Your best bet is log your timing, CF, rpm and load and work on the stock timing maps and pull the advance out where its pulling and add it where you needed it.  a quick way to see what going on and to get and idea of how much timning you need to pull out is via unisettings/lemmiwinks.

Its hard to run a lot of timimg from the k04-001 with stock manifold, you really need to port the collector and runner number 3 to help with flow first.

Your fine running the stock maf with just KTKTE corrected.

With WMI, ported exhaust manifold, forge actuator with blue spring and the compressor wheel from the k04-023 the k04-001 will flow enough for 290bhp, I ran this set up with 75hp of nos and managed a 12.5s at santa pod last summer.

I also fitted the K03s cold side to the 001 and managed 275bhp 334lbft.. Wink

The k04-001 maxed out will flow 213gs around 265bhp 13.89s 1/4 mile, but you need to have the timing bang on and the exhaust flow the best you can

Thanks.  This is really useful information.  Where did you source your parts (ie. the compressor wheel and cold side)?
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kenmac
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« Reply #17 on: January 18, 2012, 11:11:43 PM »

Alright, so I got my CFs under control by building a reasonable KFZW(2).  I also tweaked LAMFA at 100% driver request to produce an AFR in the 12's.

As you can see, I am still experiencing the same problem, but the sharp drop into rich territory is happening much later in the band.

Is there any way I can tell what criteria is causing BTS engagement, or perhaps which BTS map to look at?  I logged my cat temps, which seem to range from 550 to 700 degC.  Unfortunately I'm still trying to locate TABGBTS in my file. 

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phila_dot
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« Reply #18 on: January 19, 2012, 12:28:10 AM »

Have you modified KFLBTS? IIRC it is extremely rich up top.
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kenmac
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« Reply #19 on: January 19, 2012, 08:58:02 AM »

Have you modified KFLBTS? IIRC it is extremely rich up top.

I have not.  But if I understand correctly, a BTS table is engaged for component protection.  Wouldn't the switch from LAMFA to KFLBTS indicate that something is exceeding a threshold?  And if so, wouldn't leaning out KFLBTS basically undermine the correction that was intended?  I am fully open to the fact that I could be looking at this wrong.
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kenmac
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« Reply #20 on: January 19, 2012, 09:25:32 AM »

I think I'm coming to the realization that I really need to locate TABGBTS in my definition.  I have been able to find hundreds of maps, but this one eludes me.  It is not relative to it's location in similar 06A 1.8T ECUs.
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phila_dot
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« Reply #21 on: January 19, 2012, 09:57:27 AM »

In ME7.1 Lambda will follow kflbts when ATM exceeds 500* c and lambts is the richest input. This is well below a critical temperature and there is no reason for it to enrich beyond 0.8 IMO.

Do you have ATR (EGT sensors)?

I have not lowered TABGBTS and don't think it is necessary of you are using lambts to supplement lamfa.
« Last Edit: January 19, 2012, 09:59:24 AM by phila_dot » Logged
nyet
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« Reply #22 on: January 19, 2012, 01:33:40 PM »

Agreed. If LAMFA is generally providing your lambda target, dont mess with the BTS threshold
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kenmac
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« Reply #23 on: January 19, 2012, 03:01:36 PM »

Thanks guys.  Modified KFLBTS as follows and I'm going to take it for a whirl on the way home from work.

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phila_dot
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« Reply #24 on: January 19, 2012, 04:04:31 PM »

Personally, I like to enrich beyond LAMFA earlier to run more advanced timing.
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kenmac
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« Reply #25 on: January 19, 2012, 09:40:29 PM »

Ahh.. so much better.  Thanks a lot for the guidance, fellas.

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kenmac
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« Reply #26 on: January 19, 2012, 10:01:47 PM »

Personally, I like to enrich beyond LAMFA earlier to run more advanced timing.

How soon do you reach full enrichment?  Right before full boost?  By full enrichment, I mean the richest value throughout the pull.
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