Launch control machine gun sound

[jasaircraft]

Hi Im on the latest firmware now and have lost the "machine gun" type of sound I had with the old firmware.

The customer wants the old sound back, how can I achieve this? (I used to get it with the "cut X from Y sparks" feature)

[jasaircraft]

bangbangbidibang bang!

[ragepower]

I don't have where the TS software to say exactly but it is something like this. On launch control menu change basic to advance and select 7/5 or 5/4. I wanted the same did and with 5/4 I have the "machine gun".

[jasaircraft]

Hi ragepower, turns out we dont have the "cut x sparks from y events" in the latest firmware but I managed to get the machine gun sound by reducing my soft rev limiter to 100 (within the launch ctrl setup), sounds great!

[ragepower]

I can confirm that on alpha 9 and alpha 11, you have "cut x sparks from y events", but you only have 2 option "fixed 5/7" and "fixed 4/5". With 4/5 I got "beautiful" flames and bangs. To use it you need to change the "limiter settings" from Basic to Advanced.

[nathaninwa]

Is this type of cutting x from y spark any harder on the engine than the standard soft zone setup?

[ragepower]

Is this type of cutting x from y spark any harder on the engine than the standard soft zone setup?

I don't know that, since 4/5 and 5/7 will not be always on the same cylinder, I think will be the same, but I have just a few experience with that.

[jasaircraft]

oh ok, good to know about the Advanced function

[piledriver]

Cool, I always missed the sound the old Bosch rev limiting rotors made, very intimidating to the ricers

[jasaircraft]

Do you guys use ignition retard with launch control? I think giving too much retard softens the machinegun sound... i just saw a rx7 vid and it literally sounds and spits fire like a machinegun, users like that.

[piledriver]

high % spark cut, no fuel cut, air and fuel in exhaust goes bang providing the machine gun effect.
Probably a good way to test the mufflers welds too.
Old skool---The bosch rotor shorts out the spark above a certain RPM set by a spring and weight.
WOT air/fuel with intermittent fire to light things off.

[nathaninwa]

This is -6* in the soft zone and hard cut at 3800rpm using the 4/5 advanced setting

https://youtu.be/boSAvBVCs2Q

[Barton]

something like this? https://www.instagram.com/p/-IZWX5GSb4/

fixed 5/7
spark cut
soft limit 200
spark cut zone 200
cut zone timing 0

engine 4g63 fully sequential inj and spk.


but I tried the same config with a batch injected 4g63 and did not sound like that one.

[nathaninwa]

How much fuel are you adding?

[Barton]

no fuel is added during launch, but with the random ramped option it builds boost a lot faster

[hiltonlo05]

https://vimeo.com/177433102

Not sure if this is considered the machine gun sound, but it's side pipes on a NA big block car. 3000rpm hard limit with 200rpm soft zone, something like 6 degrees retard and random progressive spark cut, no fuel cut. I can check my exact setting tonight if anyone has further interest.