Deceleration

tdehrmann1 · **Posted:** Sat Apr 06, 2019 3:42 am

GAdam40 wrote:

I achieved pops but they are too silent. I forgot about something else or need to raise more TPS values? I have catalyst and straight pipe rear exhoust

Left is modified, right stock. m52b25

for me, this works good

GAdam40 · **Posted:** Mon Apr 15, 2019 2:46 am

tdehrmann1 i tested this values in my m52b25 and works great. Now pops are louder. Thx a lot

alex16022 · **Joined:** Tue Nov 13, 2012 4:55 am **Posts:** 13

Hello. What I need to change to get some fire from the exhaust

?

328i-sport-rossi · **Joined:** Tue Jan 24, 2017 7:58 am **Posts:** 478

Tjerbe wrote:

Hello. What I need to change to get some fire from the exhaust

?

I have worked on a tune with some guys in poland, deceleration is perfect using the decel tables but i have found to get flames you need to add a touch of fuel in the relevant cells in the base fueling table

alex16022 · **Joined:** Tue Nov 13, 2012 4:55 am **Posts:** 13

Ok thanks

Pozdro

Bruno_bms.e36 · **Posted:** Sun May 05, 2019 11:29 am

So I'm pretty happy with the popcorn I get when decelerating (haven’t tested high RPM or WOT but I'm guessing I don’t get much of a result here like most have Reported). But that’s not the topic of my post.

I want to have burble just for a limited time after going of the throttle. I have tried the fuel restore settings that Pazi suggested but I get very random results with when the Fuel cut sets in...
Mostly it just cuts fuel immediately which results in no burble and heavy engine breaking when in low gear. To compensate I raised the fuel restore RPM so I can still drive in heavy traffic.
Is there a way to make this more consistent, for example by changing values in the “Detecting – Fast decreasing TPS” tables?

I will attach my current bin file, so you can see the changes I made so far.

iamslan · **Posted:** Tue May 14, 2019 6:10 am

I was able to get some popcorn (only at low RPMs) based on everything I read there.

Thanks guys!

Exhaust is 100% stock, here is the sound: https://instaud.io/3FVj

juanixo · **Posted:** Thu May 23, 2019 6:31 pm

tdehrmann1 wrote:

GAdam40 wrote:

I achieved pops but they are too silent. I forgot about something else or need to raise more TPS values? I have catalyst and straight pipe rear exhoust

Left is modified, right stock. m52b25

for me, this works good

I just tried those tables and makes some impressive pops: D i said the tables that are attached in image file

Can it be adjusted so that when we drive at less than 2000rpm, do not pops? for when we drive ECO mode jaja
basically because pops are made because inyector is open!

GAdam40 · **Posted:** Sat May 25, 2019 8:55 am

juanixo wrote:

Can it be adjusted so that when we drive at less than 2000rpm, do not pops?

Restore stock values for the right range of revs. Pops will still be but will be more silent. I think so... Try and test it

alex16022 · **Joined:** Tue Nov 13, 2012 4:55 am **Posts:** 13

juanixo wrote:

tdehrmann1 wrote:

GAdam40 wrote:

I achieved pops but they are too silent. I forgot about something else or need to raise more TPS values? I have catalyst and straight pipe rear exhoust

Left is modified, right stock. m52b25

for me, this works good

I just tried those tables and makes some impressive pops: D i said the tables that are attached in image file

Can it be adjusted so that when we drive at less than 2000rpm, do not pops? for when we drive ECO mode jaja
basically because pops are made because inyector is open!

7008Rpm is Hard limit or immediate ?

dx4picco · **Posted:** Fri Jun 07, 2019 3:41 pm

These tables are not related to rpm limiter (neither hard/soft/immediate...)

This is lower threshold for fuel injector restore. making it 7000 means you fuel injector will never shut down during deceleration.

misiasty · **Joined:** Mon Apr 09, 2018 5:44 am **Posts:** 29

Little refresh
Got bored of the pops and bangs, cause everybody in my town is running them
I've managed to get pretty nice results recently with flame exhaust
Im pretty happy with it but still working on consistency, it shots flames but i think it happens too occasionally under load.
Tried to work on dashpot, setting it from 40% to 100% and the difference is barely noticeable
I feel like to shot flames while shifting we need to make the tables kick faster somehow?

Has somebody improved the results here? Or would like to work on it to make it spit flames like in turbo supras? XD

https://www.youtube.com/watch?v=avckX1nmHCI
https://www.youtube.com/watch?v=aHgyhiXcC7c
exhaust here is little too restricted, straight pipe surelly would make it better

@328i-sport-rossi counting on you

GAdam40 · **Posted:** Fri Jun 21, 2019 8:08 am

Turbo supras (modified JZ's) have turbo of course, so they have faster exhaust gas flow. Also they have rpm limiter cut by ignition sparks not by fuel pomp (famous ratata 2step limiter). To make ignition RPM limiter you must use aftermarket ECU

misiasty · **Joined:** Mon Apr 09, 2018 5:44 am **Posts:** 29

GAdam40 wrote:

Turbo supras (modified JZ's) have turbo of course, so they have faster exhaust gas flow. Also they have rpm limiter cut by ignition sparks not by fuel pomp (famous ratata 2step limiter). To make ignition RPM limiter you must use aftermarket ECU

yeah, i know that but its still fun to make n/a spit flames like some track DTM cars

AFAIK N/A motors spit flames due to high cam overlap
I;m not looking for solution 1:1 to 1000hp supra (lmao) but something good enough that will make me and my friends smile

GAdam40 · **Posted:** Fri Jun 21, 2019 9:05 am

So try to achieve 2step limiter by ignition cut. Omex, Bee*R etc, are incompatible with ours bmw, but maybe with aftermarket ecu like ECUMaster is possible to do it.

Here is a N/A miata with 2step and it looks not bad:
https://youtu.be/glJazL9_HrQ

RomRaider

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