Turbo with OEM front pipe - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Eazy-V · 05-01-2017, 04:56 PM

I have a FBM turbo with supplied 3" downpipe and Greedy EVO3 2.75" catback, but still use the OEM catalyzed front pipe which I think is only 2.25".

What frontpipes are you guys running and how bad is the noise and fumes?

I'm think of getting the Blitz 2.75" catless front pipe, so anyone have this and would gains be big? I have mine tuned to 12psi max.

COO86L · 05-01-2017, 05:40 PM

Quote:

Originally Posted by Eazy-V

I have a FBM turbo with supplied 3" downpipe and Greedy EVO3 2.75" catback, but still use the OEM catalyzed front pipe which I think is only 2.25".

What frontpipes are you guys running and how bad is the noise and fumes?

I'm think of getting the Blitz 2.75" catless front pipe, so anyone have this and would gains be big? I have mine tuned to 12psi max.

I ran a Sydney Motorsport Engineering kit with a Borg Warner turbo at 18 PSI tuned by Delicious Tuning utilising the stock front pipe. I had an SME over pipe and a stock midpipe with only an axleback exhaust.

The main issue I found was boost taper. 18 PSI used to taper to 12 PSI by redline. I swapped it out for the Blitz 2.75" and put the stock axleback muffler on and found my issue mostly resolved!

You have a lot of different piping sizes in your exhaust so it would make sense to bolt up a Blitz front pipe or similar, even if just to cure my OCD.

Eazy-V · 05-01-2017, 10:06 PM

Quote:

Originally Posted by COO86L

I ran a Sydney Motorsport Engineering kit with a Borg Warner turbo at 18 PSI tuned by Delicious Tuning utilising the stock front pipe. I had an SME over pipe and a stock midpipe with only an axleback exhaust.

The main issue I found was boost taper. 18 PSI used to taper to 12 PSI by redline. I swapped it out for the Blitz 2.75" and put the stock axleback muffler on and found my issue mostly resolved!

You have a lot of different piping sizes in your exhaust so it would make sense to bolt up a Blitz front pipe or similar, even if just to cure my OCD.

How's the fumes and any raspy noises?

I'm trying to find a 2.75-3" frontpipe with a cat...any known available or just custom?

Amputechture · 05-01-2017, 10:37 PM

Quote:

Originally Posted by Eazy-V

How's the fumes and any raspy noises?

I'm trying to find a 2.75-3" frontpipe with a cat...any known available or just custom?

JDL, Nameless, Full Race, and Ultimate Racing.

Eazy-V · 05-04-2017, 08:42 AM

Quote:

Originally Posted by Amputechture

JDL, Nameless, Full Race, and Ultimate Racing.

Most them seems to be 2.5" or a downpipe combo...do you know any part numbers?

GsxrMe · 05-04-2017, 01:36 PM

Im running 3" all the way back without a resonator or cat and it sounds good. Zero rasp an sounds good as hell.

I should just post a sound clip on YouTube for everyone.

Amputechture · 05-04-2017, 02:02 PM

Quote:

Originally Posted by Eazy-V

Most them seems to be 2.5" or a downpipe combo...do you know any part numbers?

I don't. Ive visited everyone of each company's websites and can tell you that they are all listed.

Eazy-V · 05-16-2017, 05:00 AM

It seems like the only current 3" catted front pipes for the FRS is the JDL and AVO? Anyone have either and which one would you recommend?

Also, since these are bolt-ons to OEM, does anyone know if they actually taper down to OEM size of 2.25" or are they 3" end to end?

Detroiter · 05-16-2017, 12:35 PM

Quote:

Originally Posted by Eazy-V

It seems like the only current 3" catted front pipes for the FRS is the JDL and AVO? Anyone have either and which one would you recommend?

Also, since these are bolt-ons to OEM, does anyone know if they actually taper down to OEM size of 2.25" or are they 3" end to end?

The JDL is 3" end to end and I am assuming the AVO is also. They are designed to be used with a 3" all the way through setup. That's the most efficient and best way to run exhaust on a boosted 86.

Amputechture · 05-16-2017, 02:06 PM

Quote:

Originally Posted by Detroiter

The JDL is 3" end to end and I am assuming the AVO is also. They are designed to be used with a 3" all the way through setup. That's the most efficient and best way to run exhaust on a boosted 86.

I have a 3 inch downpipe, followed by a 2.5 inch turboback with a Berk catted FP. The berk piece is definetly the biggest restriction, the connection to the midpipe tapers down to 2 1/4....I was so pissed when I measured it.

Detroiter · 05-16-2017, 03:09 PM

Quote:

Originally Posted by Amputechture

I have a 3 inch downpipe, followed by a 2.5 inch turboback with a Berk catted FP. The berk piece is definetly the biggest restriction, the connection to the midpipe tapers down to 2 1/4....I was so pissed when I measured it.

Damn, why would they taper it down that narrow? I feel like it's counter intuitive. Tests have shown our engine has the best exhaust flow at 3in but it is of course louder so I understand the 2.75 and 2.5 to quiet it down some but 2.25 would just be making rasp and less power

Amputechture · 05-16-2017, 03:47 PM

Quote:

Originally Posted by Detroiter

Damn, why would they taper it down that narrow? I feel like it's counter intuitive. Tests have shown our engine has the best exhaust flow at 3in but it is of course louder so I understand the 2.75 and 2.5 to quiet it down some but 2.25 would just be making rasp and less power

Berk's explanation was that they wanted the end user to be able to have 0 fitment issues with the OEM catback and be able to retain the factory donut gasket. F'ing stupid if you ask me. 99/100 people that run a front pipe on this car are going to have an aftermarket CBE. They should have just made the bolt pattern on the flange be compatible with the smaller diameter stock flange.

Eazy-V · 05-24-2017, 10:41 PM

I went with the JDL ultra quiet catted 3" front pipe with flat flange, hope itvfirs the Greddy EVO3

Bobster · 06-14-2017, 09:01 AM

Stock FP good for 10PSI?

05-01-2017, 04:56 PM	#1
Eazy-V Senior Member Join Date: Mar 2013 Drives: 2013 Scion FR-S Whiteout Location: Vancouver, BC Posts: 140 Thanks: 9 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Turbo with OEM front pipe I have a FBM turbo with supplied 3" downpipe and Greedy EVO3 2.75" catback, but still use the OEM catalyzed front pipe which I think is only 2.25". What frontpipes are you guys running and how bad is the noise and fumes? I'm think of getting the Blitz 2.75" catless front pipe, so anyone have this and would gains be big? I have mine tuned to 12psi max. __________________ FBM Base Turbo Kit with GTX2867R and FlexFuel Kit with Walbro 485 / 550cc Injectors EcuTek Tuned witih Greddy Profec @ 12PSI Shell 91-E73 and 18PSI E73 1993 Mazda MX6 N/A Fully Built on MegaSquirt (work in progress) 2023 Chevrolet Corvette Z51 Stock

05-04-2017, 01:36 PM	#6
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 184 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Im running 3" all the way back without a resonator or cat and it sounds good. Zero rasp an sounds good as hell. I should just post a sound clip on YouTube for everyone. __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

05-16-2017, 05:00 AM	#8
Eazy-V Senior Member Join Date: Mar 2013 Drives: 2013 Scion FR-S Whiteout Location: Vancouver, BC Posts: 140 Thanks: 9 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	It seems like the only current 3" catted front pipes for the FRS is the JDL and AVO? Anyone have either and which one would you recommend? Also, since these are bolt-ons to OEM, does anyone know if they actually taper down to OEM size of 2.25" or are they 3" end to end? __________________ FBM Base Turbo Kit with GTX2867R and FlexFuel Kit with Walbro 485 / 550cc Injectors EcuTek Tuned witih Greddy Profec @ 12PSI Shell 91-E73 and 18PSI E73 1993 Mazda MX6 N/A Fully Built on MegaSquirt (work in progress) 2023 Chevrolet Corvette Z51 Stock

05-24-2017, 10:41 PM	#13
Eazy-V Senior Member Join Date: Mar 2013 Drives: 2013 Scion FR-S Whiteout Location: Vancouver, BC Posts: 140 Thanks: 9 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I went with the JDL ultra quiet catted 3" front pipe with flat flange, hope itvfirs the Greddy EVO3 __________________ FBM Base Turbo Kit with GTX2867R and FlexFuel Kit with Walbro 485 / 550cc Injectors EcuTek Tuned witih Greddy Profec @ 12PSI Shell 91-E73 and 18PSI E73 1993 Mazda MX6 N/A Fully Built on MegaSquirt (work in progress) 2023 Chevrolet Corvette Z51 Stock

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06-14-2017, 09:01 AM	#14
Bobster Member Join Date: Apr 2016 Drives: GT86 GTS Location: Sydney Posts: 94 Thanks: 13 Thanked 24 Times in 18 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Stock FP good for 10PSI?

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