DIY Rom tuning for exhaust pops and backfires W/ romraider - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

andrew5826 · 03-18-2014, 10:15 PM

did some testing and changes to achieve a noisier exhaust. no damage to anything so far and barely any changes in gas mileage(.1 L/100km).

with just ignition base timing A modified, no pops produced. ignition base timing B produced some pops, but not as aggressive. i ended changing both ignition base timing maps A and B to -10* timing in the lowest load column(.15g/rev). with the lowest load at negative timing, it kind of made the throttle an on/off switch for the pops. you wouldn't reach that engine load when normally driving or when decelerating. but if you gave it the slightest bit of throttle to that sweet spot, it would spit pops and become obnoxious. but everyone loves it. changing the full decel engine load value to negative timing doesn't produce pops for some reason. but its better to not have pops at full decel because you don't want to constantly become a pack of firecrackers when coming to a stop.

after messing with the ignition maps, i started looking into fueling. with the overrun enrich rpm delta activation set to 6000, the pops were alot more aggressive and rally sounding, as opposed to before where it sounded like you were running over a bunch of pop cans.

trying to achieve flames but i think this is as far as im going. i don't want to break stuff

UPDATE 3/16/2015 wow hard to believe this was a year ago.. just an update
don't mess with fueling or overrun. it was probably more placebo effect than it actually doing anything. just do ignition map B. A is a limp map. read through the whole thread before you attempt this on your own car

UPDATE #2 hahaha seeing this again reminded me of my ricer days. glad alot of you are enjoying this!
dirty clip of when it there was no catback. follow me on ig!

https://www.instagram.com/p/wz5XYVRD...anesespaceship

will get some driving videos up. just need a exterior camera mounting solution

exterior video!
[ame="https://www.youtube.com/watch?v=OGMrf382Kx4"]https://www.youtube.com/watch?v=OGMrf382Kx4[/ame]

bored @ a railroad crossing under a roof
[ame]http://youtu.be/ghEAXxeHYcU[/ame]

[ame]http://youtu.be/CMDSWnLG2N0[/ame]

[ame]http://youtu.be/c2VgspN8oBQ[/ame]

glorydays · 03-18-2014, 11:29 PM

awesome.

86-tundra · 03-19-2014, 12:49 AM

this is desirable???

forzajuve · 03-19-2014, 12:56 AM

so dope. if you could get the pops to sound a tad deeper in tone, that would be perfect.

2nd video sounds like fireworks in the distance. This is it
3rd video it died out?

Simon99 · 03-19-2014, 01:34 AM

I don't want to sound like a smartass but what's the point of that ?

andrew5826 · 03-19-2014, 03:15 PM

because racecar??

the 3rd video was the first map i made. not as loud

mxsled · 03-19-2014, 03:29 PM

yep it's sounds great

also the new mercedes cla 45 amg have the same exhaust pops
[ame="http://youtu.be/zkcoeg4Tyd4"]http://youtu.be/zkcoeg4Tyd4[/ame]

86-tundra · 03-19-2014, 06:25 PM

Quote:

Originally Posted by forzajuve

so dope.

Must be a california thing. Most of the trends out there haven't caught on here yet. Thank god.

bee_are_zee · 03-19-2014, 09:01 PM

Got bored. Tried it. Nothing. But then Again I still have stock over pipe and front pipe and a greddy sp style exhaust. Oh and it wasn't really warmed up so maybe I will hear something after driving it around.

mrk1 · 03-19-2014, 10:30 PM

I love the idea. As long as it doesn't hurt any thing to for it.

Marusich · 03-19-2014, 11:32 PM

I don't know why but I love that sound, when it's done right. Options for the OFT @shiv@vishnu? So long as it's safe.

mashal · 03-20-2014, 12:15 AM

Need some ecutek guru's in here

Walla Walla · 03-20-2014, 08:44 AM

Quote:

Originally Posted by Marusich

I don't know why but I love that sound, when it's done right. Options for the OFT @shiv@vishnu? So long as it's safe.

there is already another thread on this, and Shiv already told that it would be added to OFT

SmsAlSuwaidi · 03-20-2014, 05:15 PM

Quote:

Originally Posted by mashal

Need some ecutek guru's in here

@nelsmae @jamesm

03-18-2014, 10:15 PM	#1
andrew5826 Señor Member Join Date: Jun 2013 Drives: BRZ SWP Location: BC Canada Posts: 192 Thanks: 22 Thanked 109 Times in 54 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	DIY Rom tuning for exhaust pops and backfires W/ romraider did some testing and changes to achieve a noisier exhaust. no damage to anything so far and barely any changes in gas mileage(.1 L/100km). with just ignition base timing A modified, no pops produced. ignition base timing B produced some pops, but not as aggressive. i ended changing both ignition base timing maps A and B to -10* timing in the lowest load column(.15g/rev). with the lowest load at negative timing, it kind of made the throttle an on/off switch for the pops. you wouldn't reach that engine load when normally driving or when decelerating. but if you gave it the slightest bit of throttle to that sweet spot, it would spit pops and become obnoxious. but everyone loves it. changing the full decel engine load value to negative timing doesn't produce pops for some reason. but its better to not have pops at full decel because you don't want to constantly become a pack of firecrackers when coming to a stop. after messing with the ignition maps, i started looking into fueling. with the overrun enrich rpm delta activation set to 6000, the pops were alot more aggressive and rally sounding, as opposed to before where it sounded like you were running over a bunch of pop cans. trying to achieve flames but i think this is as far as im going. i don't want to break stuff UPDATE 3/16/2015 wow hard to believe this was a year ago.. just an update don't mess with fueling or overrun. it was probably more placebo effect than it actually doing anything. just do ignition map B. A is a limp map. read through the whole thread before you attempt this on your own car UPDATE #2 hahaha seeing this again reminded me of my ricer days. glad alot of you are enjoying this! dirty clip of when it there was no catback. follow me on ig! https://www.instagram.com/p/wz5XYVRD...anesespaceship will get some driving videos up. just need a exterior camera mounting solution exterior video! [ame="https://www.youtube.com/watch?v=OGMrf382Kx4"]https://www.youtube.com/watch?v=OGMrf382Kx4[/ame] bored @ a railroad crossing under a roof [ame]http://youtu.be/ghEAXxeHYcU[/ame] [ame]http://youtu.be/CMDSWnLG2N0[/ame] [ame]http://youtu.be/c2VgspN8oBQ[/ame] Last edited by andrew5826; 02-13-2019 at 11:34 PM.

03-19-2014, 12:49 AM	#3
86-tundra Troll Hunter Join Date: Aug 2013 Drives: fr-s, tundra Location: Somewhere Posts: 1,424 Thanks: 1,695 Thanked 922 Times in 470 Posts Mentioned: 39 Post(s) Tagged: 0 Thread(s)	this is desirable??? __________________ DIY Winjet Retrofit

03-19-2014, 12:56 AM	#4
forzajuve Banned Join Date: Mar 2013 Drives: Ultramarine 86 - 6MT Location: California Posts: 533 Thanks: 184 Thanked 139 Times in 82 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	so dope. if you could get the pops to sound a tad deeper in tone, that would be perfect. 2nd video sounds like fireworks in the distance. This is it 3rd video it died out? Last edited by forzajuve; 03-19-2014 at 01:35 AM.

03-19-2014, 03:29 PM	#7
mxsled Senior Member Join Date: Jul 2012 Drives: Audi A3 2012 Location: Canada Posts: 163 Thanks: 193 Thanked 99 Times in 54 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	yep it's sounds great also the new mercedes cla 45 amg have the same exhaust pops [ame="http://youtu.be/zkcoeg4Tyd4"]http://youtu.be/zkcoeg4Tyd4[/ame] __________________ Moto east Ecutek /JDL UEL Header/Nameless Performance axleback exhaust-Motiv overpipe/Full Perrin CAI/BC Racing Coilover/Traklite angle 18x9/Federal 595 RS-R (245-35-18)/Blackhousing,hid 4300k headlights/Crystal eyes taillight/Anarchy Motive Heavy ShiftKnob/Cusco Sport pedals/Jpm Coachworks alcantara dash panel,cluster,shift boot,

03-19-2014, 10:30 PM	#10
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	I love the idea. As long as it doesn't hurt any thing to for it. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

03-18-2014, 11:29 PM	#2
glorydays Remember me? Join Date: Dec 2011 Drives: BRZ Series.Blue Location: Honolulu, HI Posts: 483 Thanks: 259 Thanked 105 Times in 68 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	awesome.

03-19-2014, 03:15 PM	#6
andrew5826 Señor Member Join Date: Jun 2013 Drives: BRZ SWP Location: BC Canada Posts: 192 Thanks: 22 Thanked 109 Times in 54 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	because racecar?? the 3rd video was the first map i made. not as loud

03-19-2014, 09:01 PM	#9
bee_are_zee Senior Member Join Date: Nov 2013 Drives: GBS BRZ Location: Kentucky Posts: 256 Thanks: 42 Thanked 98 Times in 60 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Got bored. Tried it. Nothing. But then Again I still have stock over pipe and front pipe and a greddy sp style exhaust. Oh and it wasn't really warmed up so maybe I will hear something after driving it around.

03-20-2014, 12:15 AM	#12
mashal DADA Join Date: Jun 2012 Drives: 2013 Location: Kanada Posts: 1,500 Thanks: 47 Thanked 388 Times in 249 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Need some ecutek guru's in here

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