Overrun settings for Lambo exhaustcrackle?

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rguil
MS/Extra Newbie
Posts: 7
Joined: Wed Nov 30, 2016 1:33 pm

Overrun settings for Lambo exhaustcrackle?

Post by rguil »

Ive driven a Huracan and an Aventador extensively and one of my favorite things about both of them was the tuned exhaust. Every time you let off the throttle in the huracan, even in neutral the exhaust pops and rattles a joyful sound.
I recently converted my b5 audi s4 to a ms3 pro and I love it but I wanted to see what you guys would recommend I change my over run settings to get those pops!
https://www.youtube.com/watch?v=5QYzxowWXGw
Here is a link to a huracan doing it after revs to get a good idea of what im talking about.
My b5 s4 has
rs6 hybrid turbos, catless 3 inch dual exhaust, all the fun mods.

Tell me what you guys think!
Nath88
MS/Extra Newbie
Posts: 27
Joined: Wed May 22, 2013 8:13 pm
Location: Brisbane, Australia

Re: Overrun settings for Lambo exhaustcrackle?

Post by Nath88 »

Turn off decel fuel cut off, then retard the timing in the overrun part of the map until you get what you want. You might want to try leaning the mixture a bit in that zone too.
It's probably not that nice to your turbos, but wouldn't be as bad as antilag.

Maybe put a gopro near the exhaust to show the effects of different settings...
Yamaha YZ250 - Microsquirt V3 - Madhu PWM Fuel Pressure Regulator - 14point7 Spartan Lambda Controller 2
subwoofer
Super MS/Extra'er
Posts: 884
Joined: Sat Apr 30, 2011 12:34 pm
Location: Sandefjord, Norway

Re: Overrun settings for Lambo exhaustcrackle?

Post by subwoofer »

I thought it should be rich on overrun to get the crackle, my Jensen Healey crackles like crazy, running DHLA45s. With the crazy vacuum you get on overrun, I expect the idle circuit to dump fuel by the bucket. That said, I haven't measured.
Joachim
1974 Jensen-Healey
1990 VW Caravelle Syncro - running MS3+X
2014 Ford Fiesta EcoBoost
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