Possible to tune car a bit louder at idle/low rpm? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cawith · 03-25-2016, 05:30 AM

Hi guys,

I'm running a catless UEL header with otherwise stock exhaust tuned with OFT stage 2 and some Wayne modifications.

I'm really happy about the sound and volume above 2500-3000 rpm, and I'd rather not have it any louder.

However idle and low rpm sounds a little too tame for my taste when warmed up.
What tune changes can I do to increase the volume of the sweet rumble in the low range and especially at idle, other than increasing the idle rpm..?

FRSBRZGT86FAN · 03-25-2016, 06:08 AM

Quote:

Originally Posted by cawith

Hi guys,

I'm running a catless UEL header with otherwise stock exhaust tuned with OFT stage 2 and some Wayne modifications.

I'm really happy about the sound and volume above 2500-3000 rpm, and I'd rather not have it any louder.

However idle and low rpm sounds a little too tame for my taste when warmed up.
What tune changes can I do to increase the volume of the sweet rumble in the low range and especially at idle, other than increasing the idle rpm..?

the exact opposite of what the cold start tune tries to achieve. Hold a higher idle speed RPM target, retard the timing more etc.

Wayno · 03-25-2016, 06:12 AM

There's not much you can do without negatively effecting economy.

Wayno · 03-25-2016, 06:12 AM

Quote:

Originally Posted by FRSBRZGT86FAN

the exact opposite of what the cold start tune tries to achieve. Hold a higher idle speed RPM target, retard the timing more etc.

What the hell is a cold start tune?

FRSBRZGT86FAN · 03-25-2016, 06:18 AM

Quote:

Originally Posted by Wayno

What the hell is a cold start tune?

The quiet cold start EDIT not tune, to get it to not bark and wake up neighbors in the morning with uels and a muffler delete. Where you simply open up romraider and edit timing, the idle speed targets, the maf tables for in gear and neutral....

Wayno · 03-25-2016, 06:28 AM

Which has absolutely zero relevance with engine volume when warm.

steve99 · 03-25-2016, 07:26 AM

I think your goal will be hard to achieve.

If you retard timing during normal idle your going to have to alter a lot of idle tables and idle stability tables, the car idles at arround +11 degrees and theirs heaps of compensations for stuff like air cond and alternator and likely heaps of other undefined tables that we know nothing about. It likely to have heaps of unknown or undesirable effects and alter economy motor torque likely stalling issues ect.

cawith · 04-07-2016, 08:17 PM

Thanks for your responses.

I guess I'll have to live with it the way it is, or get a catback that won't drive me nuts.

ryoma · 04-07-2016, 10:31 PM

if you want it louder, just downshift and it will be louder. having a quiet idle is useful when you don't want to attract attention.

WRBrzRX · 04-08-2016, 04:39 AM

very hard to downshift while idling

Teseo · 04-08-2016, 01:11 PM

Rev the engine at 1200rpms and try stay there

FRSBRZGT86FAN · 04-10-2016, 12:06 AM

Quote:

Originally Posted by cawith

Hi guys,

I'm running a catless UEL header with otherwise stock exhaust tuned with OFT stage 2 and some Wayne modifications.

I'm really happy about the sound and volume above 2500-3000 rpm, and I'd rather not have it any louder.

However idle and low rpm sounds a little too tame for my taste when warmed up.
What tune changes can I do to increase the volume of the sweet rumble in the low range and especially at idle, other than increasing the idle rpm..?

Quote:

Originally Posted by Teseo

Rev the engine at 1200rpms and try stay there

I'm gonna assume he has everything stock except for uel exhaust wise and I would say just get an axleback that would totally help the idle out

cawith · 04-10-2016, 01:02 PM

But axle back would make it very loud all over the rev range with a catless header, wouldn't it?
I've only heard one aftermarket exhaust on a GT86 (I think it was a Perrin). As I remember it, it was very deep and numb sound due to his stock header, but it was still as loud as mine is now while driving.

tracerit · 04-18-2016, 05:55 AM

If I wanted my idle RPM to be at 800 instead of the OFT's 750, do I just change all the 750 values in every table shown below to 800, and change the values that were 775 to 800? Would there be any other tables I'd have to change?

I'd like a higher idle RPM so I can roll off the clutch to get moving easier rather than giving it some gas.

03-25-2016, 05:30 AM	#1
cawith Member Join Date: Oct 2014 Drives: Toyota GT86 6M/T Location: Denmark Posts: 90 Thanks: 59 Thanked 7 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Possible to tune car a bit louder at idle/low rpm? Hi guys, I'm running a catless UEL header with otherwise stock exhaust tuned with OFT stage 2 and some Wayne modifications. I'm really happy about the sound and volume above 2500-3000 rpm, and I'd rather not have it any louder. However idle and low rpm sounds a little too tame for my taste when warmed up. What tune changes can I do to increase the volume of the sweet rumble in the low range and especially at idle, other than increasing the idle rpm..?

03-25-2016, 06:12 AM	#3
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 896 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	There's not much you can do without negatively effecting economy. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

03-25-2016, 06:28 AM	#6
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 896 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	Which has absolutely zero relevance with engine volume when warm. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

04-07-2016, 10:31 PM	#9
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	if you want it louder, just downshift and it will be louder. having a quiet idle is useful when you don't want to attract attention. __________________ My 2015 CWP BRZ Build

04-18-2016, 05:55 AM	#14
tracerit Senior Member Join Date: Aug 2012 Drives: '13 SSM BRZ Limited 6MT Location: Orange County, CA Posts: 1,067 Thanks: 593 Thanked 198 Times in 137 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	If I wanted my idle RPM to be at 800 instead of the OFT's 750, do I just change all the 750 values in every table shown below to 800, and change the values that were 775 to 800? Would there be any other tables I'd have to change? I'd like a higher idle RPM so I can roll off the clutch to get moving easier rather than giving it some gas. Attached Images

03-25-2016, 07:26 AM	#7
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,993 Times in 2,983 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	I think your goal will be hard to achieve. If you retard timing during normal idle your going to have to alter a lot of idle tables and idle stability tables, the car idles at arround +11 degrees and theirs heaps of compensations for stuff like air cond and alternator and likely heaps of other undefined tables that we know nothing about. It likely to have heaps of unknown or undesirable effects and alter economy motor torque likely stalling issues ect.

04-07-2016, 08:17 PM	#8
cawith Member Join Date: Oct 2014 Drives: Toyota GT86 6M/T Location: Denmark Posts: 90 Thanks: 59 Thanked 7 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Thanks for your responses. I guess I'll have to live with it the way it is, or get a catback that won't drive me nuts.

04-08-2016, 04:39 AM	#10
WRBrzRX Senior Member Join Date: Nov 2015 Drives: runs&drives Location: CA Posts: 123 Thanks: 304 Thanked 95 Times in 55 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	very hard to downshift while idling

04-08-2016, 01:11 PM	#11
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,952 Thanks: 7,466 Thanked 2,980 Times in 1,802 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	Rev the engine at 1200rpms and try stay there

04-10-2016, 01:02 PM	#13
cawith Member Join Date: Oct 2014 Drives: Toyota GT86 6M/T Location: Denmark Posts: 90 Thanks: 59 Thanked 7 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	But axle back would make it very loud all over the rev range with a catless header, wouldn't it? I've only heard one aftermarket exhaust on a GT86 (I think it was a Perrin). As I remember it, it was very deep and numb sound due to his stock header, but it was still as loud as mine is now while driving.

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