Greddy Turbo Kit 2.5/2.75" to 3"FP/CB Gains - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

midnight23 · 03-03-2014, 11:39 PM

Dyno results in for the change from 2.5" front pipe and 2.75" catback to 3" Front Pipe and 3" Resonated Catback @MAPerformance

Power band is smoother across the board along with torque and whp gains and increased spool through the whole band.
This is untuned as well so there is still more on the table to adjust for the exhaust changes.

Previous Dyno for reference, will get an overlapped chart soon from Evasive.

chiefshayan · 03-03-2014, 11:52 PM

So about +5WHP and +6WTQ? Definitely expected more, I think I've seen either Evasive or Prime showing dynos of 2.5in -> 3in and it was around the +60WHP. Maybe the tune is really the determining factor.

midnight23 · 03-04-2014, 12:26 AM

Quote:

Originally Posted by chiefshayan

So about +5WHP and +6WTQ? Definitely expected more, I think I've seen either Evasive or Prime showing dynos of 2.5in -> 3in and it was around the +60WHP. Maybe the tune is really the determining factor.

Well keep in mind this is only the front pipe and catback and the previous catback was already 2.75", larger gains will always be seen with bigger turbos going from small exhausts to larger ones. I'm happy with the results untuned as it also got rid of the annoying drone of the Evo3 before.

midnight23 · 03-04-2014, 03:11 PM

Overlayed dynod

Tansey86 · 03-04-2014, 03:18 PM

In a turbo application the bigger the exhaust closest to the turbo is what helps the most. Going from 2.5" to 3" in the Downpipe and Overpipe section is what would yield the most gains.

Thanks for this. Sick of people saying >2.5" exhaust isn't needed on these cars.

OjiGeorge · 03-06-2014, 06:36 PM

I've got the ARK Grip (2.5 cat-back) and the Tomei 80... Not sure if the moderate power increase is worth the considerable increase of in-cabin noise.

Might have to carry a set of earplugs for the ladies.

sw20kosh · 03-06-2014, 06:43 PM

The tune will show the remaining difference. Your tuner will be able to add timing probably.

woode · 03-06-2014, 07:32 PM

Looks good, I have been contemplating going to a 3" exhaust. Right now I am 2.5" after the down pipe (3"). How is the sound difference? Pretty noticeable?

midnight23 · 03-06-2014, 10:34 PM

Honestly it is a lot quieter than the Evo3 and ALL drone is removed which is nice because I am on the highway majority of the time.

03-03-2014, 11:39 PM	#1
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	Greddy Turbo Kit 2.5/2.75" to 3"FP/CB Gains Dyno results in for the change from 2.5" front pipe and 2.75" catback to 3" Front Pipe and 3" Resonated Catback @MAPerformance Power band is smoother across the board along with torque and whp gains and increased spool through the whole band. This is untuned as well so there is still more on the table to adjust for the exhaust changes. Previous Dyno for reference, will get an overlapped chart soon from Evasive. __________________ GReddy Turbo BRZ tuned by Evasive Motorsports Build Thread Instagram

03-04-2014, 03:11 PM	#4
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	Overlayed dynod __________________ GReddy Turbo BRZ tuned by Evasive Motorsports Build Thread Instagram

03-04-2014, 03:18 PM	#5
Tansey86 Senior Member Join Date: Sep 2012 Drives: 2003 Subaru Outback Location: Long Island, NY Posts: 1,318 Thanks: 154 Thanked 528 Times in 300 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	In a turbo application the bigger the exhaust closest to the turbo is what helps the most. Going from 2.5" to 3" in the Downpipe and Overpipe section is what would yield the most gains. Thanks for this. Sick of people saying >2.5" exhaust isn't needed on these cars. __________________ " I know a lot about cars, man. I can look at any car's headlights and tell you exactly which way it's coming. "

03-06-2014, 10:34 PM	#9
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	Honestly it is a lot quieter than the Evo3 and ALL drone is removed which is nice because I am on the highway majority of the time. __________________ GReddy Turbo BRZ tuned by Evasive Motorsports Build Thread Instagram

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03-03-2014, 11:52 PM	#2
chiefshayan Senior Member Join Date: Mar 2013 Drives: 2013 AT Firestorm FRS Location: Berkeley Posts: 433 Thanks: 185 Thanked 184 Times in 88 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	So about +5WHP and +6WTQ? Definitely expected more, I think I've seen either Evasive or Prime showing dynos of 2.5in -> 3in and it was around the +60WHP. Maybe the tune is really the determining factor.

03-06-2014, 06:36 PM	#6
OjiGeorge Senior Member Join Date: Jul 2012 Drives: White 2013 FRS Location: Langley, BC Posts: 450 Thanks: 441 Thanked 146 Times in 92 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I've got the ARK Grip (2.5 cat-back) and the Tomei 80... Not sure if the moderate power increase is worth the considerable increase of in-cabin noise. Might have to carry a set of earplugs for the ladies.

03-06-2014, 06:43 PM	#7
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	The tune will show the remaining difference. Your tuner will be able to add timing probably.

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