Exhaust with Open Waste Gate - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

pbirmingham1988 · 06-12-2020, 04:33 AM

Hello Y'all,

So my current setup is:

JDL UEL GTX 2860R Turbo w/ Open Waste Gate
Motiv Overpipe
HKS Dual Resonated Frontpipe
Borla Catback (Model # 140496)

I 'm wondering why my car sounds like it's bottlenecking, and doesn't sound nearly as mean as other 86s. I used to have a Jackson Racing c30 supercharger with the same exhaust setup, and it was way better sounding.

Not sure if I need to change my Borla Catback to a muffler delete axle back for louder sound + more hp which is my goal at the moment.

Any recommendations? Should I go recirculated or change up anything in my exhaust setup?

tomm.brz · 06-12-2020, 05:29 AM

turbo is more restricted exhast side than a supercharger so you ll have to free the exhaust and increase diameters for bigger meaner sounding

Joveen · 06-12-2020, 09:59 AM

Probably change the catback or check for exhaust leaks if there is any.

Sent from my SM-N960U using Tapatalk

alphasaur · 06-12-2020, 10:05 AM

You're blocking exhaust with a turbo, turbos always quiet down exhausts.

How do you know it's bottlenecked from an HP perspective? Have you dyno'd?

06-12-2020, 04:33 AM	#1
pbirmingham1988 Member Join Date: Feb 2014 Drives: 2013 Scion FR-S Hot Lava - BBW Location: Las Vegas, NV Posts: 43 Thanks: 7 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Exhaust with Open Waste Gate Hello Y'all, So my current setup is: JDL UEL GTX 2860R Turbo w/ Open Waste Gate Motiv Overpipe HKS Dual Resonated Frontpipe Borla Catback (Model # 140496) I 'm wondering why my car sounds like it's bottlenecking, and doesn't sound nearly as mean as other 86s. I used to have a Jackson Racing c30 supercharger with the same exhaust setup, and it was way better sounding. Not sure if I need to change my Borla Catback to a muffler delete axle back for louder sound + more hp which is my goal at the moment. Any recommendations? Should I go recirculated or change up anything in my exhaust setup?

06-12-2020, 10:05 AM	#4
alphasaur friendly Join Date: Oct 2018 Drives: 17' 86 Location: Dutchess County, NY Posts: 719 Thanks: 1,443 Thanked 467 Times in 285 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	You're blocking exhaust with a turbo, turbos always quiet down exhausts. How do you know it's bottlenecked from an HP perspective? Have you dyno'd? __________________ Seek comfort in discomfort.

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06-12-2020, 05:29 AM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,199 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	turbo is more restricted exhast side than a supercharger so you ll have to free the exhaust and increase diameters for bigger meaner sounding

06-12-2020, 09:59 AM	#3
Joveen Senior Member Join Date: Mar 2018 Drives: Bone stock Location: Windsor, CT Posts: 767 Thanks: 535 Thanked 232 Times in 162 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Probably change the catback or check for exhaust leaks if there is any. Sent from my SM-N960U using Tapatalk

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