kacperoooni
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« on: February 03, 2019, 11:19:57 PM »
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HI guys,
I'm owner of a3 8l 1.8t aum, I've installed FMIC, saab injectors 0280156023 and de-catted it by placing only tube instead. During incomming 2 weeks I'll install TIP. I have k03-052. The question is about the AFR at wot. My afr at wot comes even to 10.4(lambda 0.71). Isn't it a bit to low? Should I increase it to 12? This is stock fueling. I'm afraid about the EGT but I think You guys are more experienced than me. My boost is about 0.8-0.9bar(11.6psi) at 5,5krpm to the end. THanks in advance.
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vwaudiguy
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« Reply #1 on: February 03, 2019, 11:35:00 PM »
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.71 is overly rich in most cases. What octane fuel?
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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nyet
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« Reply #2 on: February 03, 2019, 11:45:36 PM »
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EGT, CTS
Log, don't guess.
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kacperoooni
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« Reply #3 on: February 04, 2019, 12:19:34 AM »
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Thanks for replies, guys. Fuel is Pb95. I don't have egt sensor neither internal nor external. That's why I'm asking you
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untilnow
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« Reply #4 on: February 04, 2019, 01:34:00 AM »
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On K03(s) EGTs are calculated, that 0.7 sounds like BTS fueling.
Get me7logger and start logging, its the only way to do it right.
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kacperoooni
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« Reply #5 on: February 04, 2019, 01:43:31 AM »
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Yes, it's BTS fueling, but I still don't understand what should I log if I don't have EGT sensor. Calculated EGT? If yes, could You tell me what function is it?
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untilnow
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« Reply #6 on: February 04, 2019, 01:54:29 AM »
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Yes, it's BTS fueling, but I still don't understand what should I log if I don't have EGT sensor. Calculated EGT? If yes, could You tell me what function is it?
tabgbts_w
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kacperoooni
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« Reply #7 on: February 04, 2019, 02:03:09 AM »
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I thought so, thanks.
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kacperoooni
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« Reply #9 on: February 04, 2019, 10:45:35 AM »
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Thanks nyet, I've already read it but I didn't really belive this calculations, because of mods installed. Does tabgbts_w is that accurate that I can rely on it's EGT?
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nyet
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« Reply #10 on: February 04, 2019, 10:57:33 AM »
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Thanks nyet, I've already read it but I didn't really belive this calculations, because of mods installed. Does tabgbts_w is that accurate that I can rely on it's EGT?
Nope. You can't. If you've made a lot of changes, the modeled EGT is likely completely off.
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kacperoooni
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« Reply #11 on: February 04, 2019, 11:34:53 AM »
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Any way to make it reading right? Is it even worth? I read about ATM but understand nothing. I've removed rear o2 too - so it only makes things worse. Or should I only correct KFLBTS?
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nyet
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« Reply #12 on: February 04, 2019, 11:37:39 AM »
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Any way to make it reading right? Is it even worth? I read about ATM but understand nothing. I've removed rear o2 too - so it only makes things worse. Or should I only correct KFLBTS?
Meh. What does "right" mean anyway? If you're using BTS to do custom fueling, or you are running much higher loads than stock, you'll have to run a bunch of logs and tweak anyway, even if calc EGTs were "accurate". It's just a number I'm sure prj will argue, but unless things are really way off, you're best off not fretting overly about tuning the EGT model itself. Just my opinion though.
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kacperoooni
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« Reply #13 on: February 04, 2019, 12:13:55 PM »
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Uhm, I mean the remap is almost finished, the only thing I have to do is set correct fuelling from 4k rpm to the end and tweak ignition a little. I'm using KFLBTS to do the fueling job as it seems to be active all the time - surely because of wrong tabgbts_w. As I understand I should tweak lambts to fuelling and don't worry about the modeled egt?
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nyet
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« Reply #14 on: February 04, 2019, 02:16:27 PM »
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Uhm, I mean the remap is almost finished, the only thing I have to do is set correct fuelling from 4k rpm to the end and tweak ignition a little. I'm using KFLBTS to do the fueling job as it seems to be active all the time - surely because of wrong tabgbts_w. As I understand I should tweak lambts to fuelling and don't worry about the modeled egt?
Even if your modeled EGT was perfect, stock BTS dumps fuel like a mofo at elevated boost. It is crazy conservative (at least the stock 2.7t is)... you're looking at 9 AFRs for really no good reason, imo. You're going to want to numb BTS regardless, and probably use it to do any high boost/rpm fueling anyway, which means you WANT it always active. You certainly don't want 14.7 through redline. It's either that, LAMFA, or KR based fueling (or a combination of all three if you are feeling frisky)
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« Last Edit: February 04, 2019, 02:18:02 PM by nyet »
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