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Author Topic: Overrun Flames, Gargle, Pop  (Read 354535 times)
mcgas001
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« Reply #30 on: November 08, 2014, 03:36:40 AM »

I have it doing this on the Astras Smiley
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mbkr89
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« Reply #31 on: November 08, 2014, 05:37:54 AM »

I have it doing this on the Astras Smiley

ok how it work ?

i think fuel cut is off
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mushtafa
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« Reply #32 on: November 08, 2014, 09:07:35 AM »

KFNWEGM is like a threshold for fuelcut. When rpms drop, fuelcut is disabled from this value downwards. So if you want gargles and pops for the entire rpm range and all gears, set it higher than your rpm limit for example.

KFTVSA is the time in seconds i think before fuelcut is activated. But its active only when clutch is depressed. At least thats how ive seen it work on Volvos.

If you want bangs between shifts, lower KFZWMN in the lower load parts.

Sorry my english... (:

Where do I start at finding these addresses? I can't find them listed in the map pack I've got, and a Google search hasn't helped. Any help much appreciated
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adam-
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« Reply #33 on: November 08, 2014, 09:09:02 AM »

I'm getting it to gargle, but no real flames or bangs tbf.

Tried various settings and it's all a bit meh.
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mbkr89
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« Reply #34 on: November 08, 2014, 10:47:49 AM »

Where do I start at finding these addresses? I can't find them listed in the map pack I've got, and a Google search hasn't helped. Any help much appreciated

post your file
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mushtafa
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« Reply #35 on: November 08, 2014, 11:02:35 AM »

As requested, thanks  Smiley
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contrast
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« Reply #36 on: November 08, 2014, 11:41:44 AM »

As i said, you need air for the fuel to ignite. I know nothing about these maps, but find a way to keep the throttle open during overrun.
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mushtafa
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« Reply #37 on: November 08, 2014, 11:51:22 AM »

I don't know, just guessing, but even on overrun the throttle doesn't completely close does it? Would it not just return to it's idling state?
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contrast
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« Reply #38 on: November 08, 2014, 12:20:58 PM »

I dont kniw either. Easiest way would be to log throttle angle or smth during overrun.
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contrast
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« Reply #39 on: November 08, 2014, 12:25:54 PM »

And even if it is in idle state, one must remember that you need a lot more air for this amount of fuel to make bangs and flames. Stoich is roughly 14parts of air and 1 part fuel. Imagine the amount of fuel being sprayed into the exhaust and how much air there has to be for a burn to happen.
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mbkr89
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« Reply #40 on: November 08, 2014, 01:08:05 PM »

As requested, thanks  Smiley

KFNWEGM
19A8D 8x5

KFTVSA
19AB5 8x5

KFVAKL
1919C 7x9

KFZWMN
178DA 12x16
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mushtafa
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« Reply #41 on: November 08, 2014, 03:42:21 PM »

KFNWEGM
19A8D 8x5

KFTVSA
19AB5 8x5

KFVAKL
1919C 7x9

KFZWMN
178DA 12x16

Many thanks!
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edgy
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« Reply #42 on: November 08, 2014, 07:55:14 PM »

And even if it is in idle state, one must remember that you need a lot more air for this amount of fuel to make bangs and flames. Stoich is roughly 14parts of air and 1 part fuel. Imagine the amount of fuel being sprayed into the exhaust and how much air there has to be for a burn to happen.

So its far too rich... how do we lean it out just on overrun?
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
edgy
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« Reply #43 on: November 08, 2014, 08:08:44 PM »

And what about cam overlap with VVT on decel? I don't even know if that's possible as I haven't played with VVT...
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
mushtafa
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« Reply #44 on: November 09, 2014, 03:59:41 AM »

I've got
KFTVSA set to 0.8 second between 1K- 2K and 2.8 seconds between 2K and 4K and set from 60c
KFTVSAKAT set to 1 second between 1K- 2K and 3 seconds between 2K and 4K
KFZWMN set to -48 between 1K and 3.25K

I'm confused regarding KFZWMN.

What is the X axis? I assume load? Is everyone just lowering the two rows at the lowest loads, to a flat figure?

This seems like a big change, which is why I'm questioning it, perhaps I've misunderstood?

See attachment. Thanks
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