Anyone make their own muffler delete / turn-down? - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mrk1 · 09-08-2013, 06:02 PM

The term back pressure seems to be the forum talk for the concepts like exhaust velocity and scavaging effects. It's a complex concept that some how got shorted to one term.

mrk1 · 09-08-2013, 06:06 PM

Quote:

Originally Posted by BlueDubbinTDI

I'll ask again. Does a resonator increase back pressure or not? I'm not that familiar with them but arent they basically a straight pipe?

Yes a straight through bottle style resonator that uses some type of absorbent material will only have minimal added turbulence inside which won't do much of anything for added "back pressure" or to hinder overall flow

BlueDubbinTDI · 09-08-2013, 07:04 PM

Does a resonator quiet down the entire rpm band like a muffler or what? How are they different?

mrk1 · 09-08-2013, 07:20 PM

A resonator will change the tone of the exhaust more so then the overall volume. Added a resonator will mellow out the sound and depending on the size and placement the tone can be adjusted. Often taking out the rasp and higher pitch sounds can make the exhaust seem quieter as it is less abrasive to the ear.

BlueDubbinTDI · 09-08-2013, 07:24 PM

I really like my Berks sound everywhere except 2200rpm, and in my Auto that's basically where the needle goes every time I touch the gas. I was going to do something to quiet the exhaust a little but really that louder and more irritating spot is what ide like to kill. So recommend a resonator or muffler?

Andrew025 · 09-08-2013, 07:41 PM

Quote:

Originally Posted by mrk1

The term back pressure seems to be the forum talk for the concepts like exhaust velocity and scavaging effects. It's a complex concept that some how got shorted to one term.

Yeah, but when people reference back pressure they never actually mean exhaust velocity or ever talk about scavenging effects though.

chadstyle · 09-09-2013, 08:54 AM

Quote:

Originally Posted by Andrew025

Yeah, but when people reference back pressure they never actually mean exhaust velocity or ever talk about scavenging effects though.

This is true and I'm not trying to take this discussion there... In theory, the muffler delete makes sense. Unfortunately the actual results haven't been good at all.

FA20Club built a full 3" exhaust for their track car knowing that they were going to install a turbo soon. They strapped the car to the dyno only to see that it lost power. The rest of the car was still stock other than a drop in filter. The full 3" is optimal for turbo setups but the car didn't respond well to it NA.

GT86drifter · 09-09-2013, 09:14 AM

This was a custom made from my local shop TM-SPL in NY from a berk muffler delete welded on a yashio factory custom tip

smbstyle · 09-09-2013, 09:22 AM

Quote:

Originally Posted by GT86drifter

This was a custom made from my local shop TM-SPL in NY from a berk muffler delete welded on a yashio factory custom tip

I like it. What wheels are those?

SpeedLab · 09-09-2013, 09:29 AM

Quote:

Originally Posted by GT86drifter

This was a custom made from my local shop TM-SPL in NY from a berk muffler delete welded on a yashio factory custom tip

Where can i get that turn-down. I've been looking for an adequate one for a long while.

Wepeel · 09-09-2013, 10:14 AM

Quote:

Originally Posted by chadstyle

This is true and I'm not trying to take this discussion there... In theory, the muffler delete makes sense. Unfortunately the actual results haven't been good at all.

FA20Club built a full 3" exhaust for their track car knowing that they were going to install a turbo soon. They strapped the car to the dyno only to see that it lost power. The rest of the car was still stock other than a drop in filter. The full 3" is optimal for turbo setups but the car didn't respond well to it NA.

chadstyle, based on what you've seen do any exhaust mods post-cat make any gains (stock ECU)? Any catback, muffler...?

stefmiesterb · 09-09-2013, 10:58 AM

Quote:

Originally Posted by chadstyle

This is true and I'm not trying to take this discussion there... In theory, the muffler delete makes sense. Unfortunately the actual results haven't been good at all.

FA20Club built a full 3" exhaust for their track car knowing that they were going to install a turbo soon. They strapped the car to the dyno only to see that it lost power. The rest of the car was still stock other than a drop in filter. The full 3" is optimal for turbo setups but the car didn't respond well to it NA.

It lost power because the diameter of the entire exhaust was increased, hence increasing the cross sectional area the air flows and decreasing exhaust velocity. An otherwise stock car with a berk/works or muffler delete would not lose as much power as this set up, or any at all.

SpeedLab · 09-09-2013, 01:19 PM

Quote:

Originally Posted by Andrew025

When will people stop with this back pressure nonsense?

People will stop once we start putting supertrapps on these cars MUAHAHA.

mrk1 · 09-09-2013, 03:58 PM

Quote:

Originally Posted by GT86drifter

This was a custom made from my local shop TM-SPL in NY from a berk muffler delete welded on a yashio factory custom tip

I love turn down tips, they need to make a come back

09-08-2013, 06:02 PM	#29
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s)	The term back pressure seems to be the forum talk for the concepts like exhaust velocity and scavaging effects. It's a complex concept that some how got shorted to one term. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

09-08-2013, 07:20 PM	#32
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s)	A resonator will change the tone of the exhaust more so then the overall volume. Added a resonator will mellow out the sound and depending on the size and placement the tone can be adjusted. Often taking out the rasp and higher pitch sounds can make the exhaust seem quieter as it is less abrasive to the ear. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

09-09-2013, 09:14 AM	#36
GT86drifter Drift Specialist Join Date: Oct 2012 Drives: 180SX,GT86 Location: JDM ONLY Posts: 1,041 Thanks: 237 Thanked 475 Times in 276 Posts Mentioned: 18 Post(s)	This was a custom made from my local shop TM-SPL in NY from a berk muffler delete welded on a yashio factory custom tip __________________ My 86 \| Instagram \| Store \| Limit Garage

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to make FR-S front turn signals stay off when not in use	Pavel	Cosmetic Modification (Interior/Exterior/Lighting)	15	10-07-2013 06:29 PM
WTB Berk Dual Exit Muffler Delete or Works AB Delete	Admired	Want-To-Buy Requests	2	09-10-2013 04:20 PM
Muffler Delete sound without deleting muffler	sw20kosh	Engine, Exhaust, Transmission	10	01-30-2013 05:09 PM
Muffler delete	zooplane	Engine, Exhaust, Transmission	11	12-16-2012 07:00 PM

09-08-2013, 07:04 PM	#31
BlueDubbinTDI Senior Member Join Date: Mar 2013 Drives: 2013 FR-S, 2012 MCS Location: Jax, FL Posts: 1,975 Thanks: 943 Thanked 570 Times in 356 Posts Mentioned: 4 Post(s)	Does a resonator quiet down the entire rpm band like a muffler or what? How are they different?

09-08-2013, 07:24 PM	#33
BlueDubbinTDI Senior Member Join Date: Mar 2013 Drives: 2013 FR-S, 2012 MCS Location: Jax, FL Posts: 1,975 Thanks: 943 Thanked 570 Times in 356 Posts Mentioned: 4 Post(s)	I really like my Berks sound everywhere except 2200rpm, and in my Auto that's basically where the needle goes every time I touch the gas. I was going to do something to quiet the exhaust a little but really that louder and more irritating spot is what ide like to kill. So recommend a resonator or muffler?

User Name		Remember Me?
Password