RomRaider

Hey it's my video Is it you who has sent me an email about this ?

Yes it is me, thank you very much dude ! I even programmed an harder limiter today, i only want that exhaust crackle thing but that aggressive crackle.

There has been lot of discussion about how to get rid of the rev hang which is present at least in ms41.0. I tried lot of things like using the ms41.2 deceleration maps but I wasn't happy with the result. It was better but still the revs didn't drop as fast I would want. I also played with the Fast decreasing TPS -detection maps, but with those I couldn't get the result I wanted, and in most cases it just made the car undriveable. Like there would have been kangaroo gas in tank

But eventually I found easy way to get totally rid of the rev hang without negative effects:
- First raise the ignition Retard - Decreasing TPS - step size so that the minimum values are 10.
- Lower the Ignition retard decreasing TPS (closed) maps by 10.
- Lower the Ignition retard decreasing TPS maps by 15.

Then flash the new SW and go for test drive. There shouldn't be any rev hang at all. Here is ms41 file you could use to copy the maps: https://drive.google.com/open?id=0B2EFG ... 1JrTjFhQUk

Then in addition to that if you want lot of exhaust popping when deceleration:
- Put the Fuel restore - RPM maps above your RPM limiter. So that it wont cut fuel when you are decelerating. (you need fuel for those pops).
- Lower the Ignition retard decreasing TPS -maps by another 10 degrees compared to the previous setup.

This will get your deceleration sound like this (I have almost stock exhaust so it's not very loud):
https://pazi88.kuvat.fi/kuvat/random+pa ... I_9618.MOV

(I will add file later)

Then if you want it more aggressive you could increase the step size and lower the Ignition retard decreasing TPS -maps even more. While decelerating you would want about negative 20 degrees of advance for loud pops so use logging to found how much you will need to lower the Ignition retard decreasing TPS -maps. but 20 to 25 lower than stock will give the same effect as in that video. I didn't want to test more because THIS WILL DESTROY YOUR CAT. And if you don't have CAT and want flames you could add some unnecessary fuel to base fuel map to the lowest load column above 1600 RPM.

Personally I would want few seconds of popping when lifting the throttle and with those mods you will get constant popping. So I will later test this:

I am running mrf582's recommendation for just a brief short exhaust crackle, it works well, but I haven't fine tuned it enough. It's a little inconsistent on my car, does it more often on low loads. But it's nice enough.

Constant crackles gets annoying quickly.

Yeah I noticed It was funny about 10 minutes and then it got annoying.

I think "ideal" program will be something like this https://youtu.be/6RgZLp2CxOQ?t=1m42s

i know that is racecar on standalone but this i how I imagine what happen:

He brakes - foot of throttle quickly, so ecu send in few cycles of fuel quite lot of fuel with ingnition retarded - that cause no rev hang and backfire, and after this point engine do not open injector anymore

Friend of mine have fully stock ecu setting and bigger injectors, turbo and his car is backfiring on stock settings ECU setting after letting of gas pedal:

https://youtu.be/PeKvzk0OWeA?t=2m6s



In pazzi88 "manual" when tweaking fuel restore point about limiter this cant be achieved i think

Maybe key is in fuel enleanment decreasing TPS table - leave fuel restore stock but add some fuel in this table to have "backfire"

The key is in the Hysteresis Delay Counter, and it does work for the most part.

my car is not driveable right now, but has anybody chceck what fuel map fields is car using during deceleration when throttle is liffted ?

so providing the delay hysteresis is set correctly, by then adding more fuel you should see a flame or two ?

And then all the ignition retard added that I mentioned. Of course you need basically straight pipe or at least straight through mufflers without cat to be able to see any flames.

I have full decat center section, I already get a blue flame at WOT on gear change at high rpm, im now hoping for more

I would also like to know this so i know where to add the fuel for the bigger bang

My "Fuel Cut - Hystersis Delay Counter" stock is 56 and my "Fuel Cut - RPM Hystersis Delay (Min)" is 224

This differs massivly from what is written above, why is this.

Are you running 412 id:12?

Hi guys, today ive tryed settings like this:

Resuults are no rev hang which make me quite happy: https://www.youtube.com/watch?v=YcZAZKRalcA

Exhaust poping is occuring very verry randomly only on when slowly letting of gas usually on lower rpm but its still quite random

tomorow i wanna try to chech infuence of IR - fast decreasing TPS ...

i do not check for glames