|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
08-22-2018, 02:58 PM | #1 |
Member
Join Date: Aug 2018
Drives: 2012 Toyota FT-86
Location: Jakarta
Posts: 25
Thanks: 7
Thanked 5 Times in 5 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Straight pipe with Stock Muffler ?
Please do forgive me if these are stupid questions. What happens if i go to a local shop and ask them to make Full Straight 2.5" pipe, 1.625" 4-1 header, except with stock axle-back. How would it sound like ? and does it gain Less power than a full straight pipe ? how bad is the drone ?
|
08-22-2018, 04:05 PM | #2 | |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,283 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
Quote:
The power change would be minor.
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
|
The Following User Says Thank You to Tcoat For This Useful Post: | lantsalot (08-22-2018) |
08-22-2018, 04:38 PM | #3 |
Senior Member
Join Date: Oct 2013
Drives: 2013 BRZ, 2023 Model 3
Location: SF Bay Area
Posts: 2,296
Thanks: 1,212
Thanked 861 Times in 570 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
|
Farty
|
08-22-2018, 05:30 PM | #4 |
LMGTFY
Join Date: Mar 2016
Drives: 13 FRS, 91 Miata
Location: Lava Town, HI
Posts: 2,776
Thanks: 5,561
Thanked 3,646 Times in 1,625 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
|
|
08-22-2018, 06:54 PM | #5 |
Senior Member
Join Date: Feb 2016
Drives: 2016 Subaru BRZ
Location: Florida
Posts: 394
Thanks: 91
Thanked 195 Times in 115 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
It'll sound quiet, like the stock axle back. I have catless header, OP, catless FP, and stock mid pipe and muffler on my car right now, sounds stock.
|
08-22-2018, 07:04 PM | #6 |
Senior Member
Join Date: Aug 2018
Drives: 2002 VX Commodore SS LS1 Auto
Location: Sydney
Posts: 2,203
Thanks: 500
Thanked 2,185 Times in 1,111 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Without a resonator it will most likely be drony, maybe.
I take it the exhaust will be catless, cats knock out alot of sound. Exhausts are a funny beast, either you like it, or don't. You can always add a resonator at a later date. As for power, you may lose some, you may gain some, where you lose or gain will depend on header design. |
08-22-2018, 07:32 PM | #7 |
Undisputed El Presidente
Join Date: Jun 2012
Drives: Zenki 37J ZN6
Location: Stockton, CA
Posts: 11,571
Thanks: 9,382
Thanked 9,397 Times in 5,261 Posts
Mentioned: 374 Post(s)
Tagged: 33 Thread(s)
|
I ran Tomei UEL, Motiv OP, Berk HFC front pipe, and stock catback for like a week.
I sounded like a 90s Civics with a Pepboys muffler. Not good. |
08-22-2018, 08:49 PM | #8 |
Senior Member
Join Date: Aug 2018
Drives: 2002 VX Commodore SS LS1 Auto
Location: Sydney
Posts: 2,203
Thanks: 500
Thanked 2,185 Times in 1,111 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
I'm confused about this ELH UELH debate, everyone with the UELH on a EJ25 STI or older WRX is getting ELH for torque and hp gains, everyone with A FA20 is going for UELH for torque and hp gains.
Surely the difference between EJ and FA for the headers and subsequent gains should be typical. From my experience, UELH have issues with the exhaust flow pulse being not efficient. Marketing?? |
08-22-2018, 08:53 PM | #9 | |
Undisputed El Presidente
Join Date: Jun 2012
Drives: Zenki 37J ZN6
Location: Stockton, CA
Posts: 11,571
Thanks: 9,382
Thanked 9,397 Times in 5,261 Posts
Mentioned: 374 Post(s)
Tagged: 33 Thread(s)
|
Quote:
WRX/STi has a turbo and no torque dip like our engine. Since you still gain up top on our car with UEL it isn't as much of a trade off plus you get the subie rumble sound vs your typical NA 4 banger sound with the EL. Edit: To clarify this is a generalization. Exact headers and tuning means ymmv |
|
The Following User Says Thank You to finch1750 For This Useful Post: | norcalpb (08-22-2018) |
08-22-2018, 11:14 PM | #10 | |
Senior Member
Join Date: Aug 2018
Drives: 2002 VX Commodore SS LS1 Auto
Location: Sydney
Posts: 2,203
Thanks: 500
Thanked 2,185 Times in 1,111 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Quote:
For all my years, ensuring you had EL and correct length/diameter of your primaries/secondarys for where you want your power was always the focal point during design and fabrication. My uncle was always going on about fluid dynamics and how important header design was. |
|
08-23-2018, 02:36 AM | #11 | |
Undisputed El Presidente
Join Date: Jun 2012
Drives: Zenki 37J ZN6
Location: Stockton, CA
Posts: 11,571
Thanks: 9,382
Thanked 9,397 Times in 5,261 Posts
Mentioned: 374 Post(s)
Tagged: 33 Thread(s)
|
Quote:
And an EL with a proper tune should help eliminate most of the dip anyway. But some EL do this better then others for whatever reason (length, diameter, etc). I'm sure it all makes a difference so just a matter of doing proper research or knowing exactly what you are doing if going DIY. Though I imagine its cheaper to let someone else like Tomei, HKS, or ACE do the R&D and just buy theirs in the end |
|
08-23-2018, 03:03 AM | #12 | |
Senior Member
Join Date: Aug 2018
Drives: 2002 VX Commodore SS LS1 Auto
Location: Sydney
Posts: 2,203
Thanks: 500
Thanked 2,185 Times in 1,111 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Unless of course I go turbo, which, at this stage, isn't in the picture. Anyways, the torque dip isn't worrying me, either I'm cruising around the streets, or, if I'm up it, it's never under the rpm where the dip is anyway. Fluid dynamics is like black magic, only with more math. |
|
08-23-2018, 11:07 AM | #13 | |
Undisputed El Presidente
Join Date: Jun 2012
Drives: Zenki 37J ZN6
Location: Stockton, CA
Posts: 11,571
Thanks: 9,382
Thanked 9,397 Times in 5,261 Posts
Mentioned: 374 Post(s)
Tagged: 33 Thread(s)
|
Quote:
|
|
08-23-2018, 04:00 PM | #14 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,149
Thanks: 18,146
Thanked 16,306 Times in 7,369 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FS: 2.5" Venturi Inserts $12 tone down drone (catless, straight pipe, muffler delete) | neilvosko | Engine, Exhaust, Bolt-Ons | 12 | 02-06-2017 11:31 AM |
SPECIAL PRICE TOMEI TITANIUM MUFFLER TYPE -80,60S,60R/FRONT STRAIGHT PIPE TYPE-80,60 | myjdmparts | Groupbuys | 15 | 10-08-2015 10:41 PM |
WTS/WTT Stock Muffler, Front Pipe & Over Pipe | Yamaha_R6 | Engine, Exhaust, Bolt-Ons | 10 | 08-25-2014 03:14 PM |