Thread: The Quest for a Quiet Muffler

+ Reply To Thread

First

Last

Posts: 101-110 of 209

Search Thread

2008-01-27 07:56:05

#101

Clown

Egg Advisory Board

Join Date: 2007-12-13
Location: Brisbane, Australia
Posts: 38
Trader Score: 0 (0%)

Originally Posted by CovertRussian

Thought about it, like running 2 mufflers. That could help, but we don't have enough space under our cars

I could stick another one of those turbo mufflers that I currently have, but I dunno if I could find another spot for them

From what I've found, a 5in body muffler will be able to clear the tunnel without too much drama.
A 6 inch will also fit, but its gonna scrape like mad.
Hmmm to sledge hammering the tunnel for clearance or not?

BTW: I just realised I've been searching muffler info for the last 5 hours

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-27 08:02:27

#102

Vadim

Administrator

Join Date: 2007-12-11
Location: VA
Posts: 16,221
Trader Score: 48 (100%)

Originally Posted by Clown

Interesting...

That could be another option...

And wow mang!

0 Likes

Be the first to like this post.

00 G20t KH3- Loller Rocker + GT28 + 6 Speed
05 Legacy GT - Big 16G @13psi + Up Pipe + Downpipe
12 Outback 2.5i Premium - Stock

Reply Reply With Quote

2008-01-27 08:08:08

#103

sqd

Member

Join Date: 2007-12-12
Location: southern california
Posts: 802
Trader Score: 0 (0%)

Originally Posted by DaKow

Ok. Now for some crazy-talk. How about a stock muffler with an electric cutout (butterfly valve like a throttle body). Here's the twist: use the same type of circuit as a shift light where it energizes at a certain RPM level (for our cars, say 6000 or so). When the circuit energizes, it opens the cutout to reduce back pressure and allow the vehicle to breathe. Anyone else try that yet? if not, I should patent it! It would keep it stock quiet until you romp on it and it would keep the exhaust velocity in the lower rpms so that you retain torque. It would be somewhat similar to the exhaust setup on the '03 spec V where it opens a valve to allow more exhaust flow within the muffler at higher rpms. The problem Nissan had with this setup is that it forced too much exhaust back up the pipe when the valve closed. To alleviate this problem, you could have the valve close slowly instead of suddenly and allow the exhaust pressure to equallize gradually and not have a sudden spike in pressure. The sudden spike in pressure was forcing pieces of catalytic converter back in through the exhaust valves and killing the engine. Any input on that idea would be appreciated; especially from any engineers we have on the forum.

wouldn't this idea work better with load, not RPM? so if you romp on it even at 2-3k you still want the reduced backpressure. so if youre engine is loaded anywhere from say 70-100 percent it opens? seems like if you could figure this out it would be sweet.

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-27 13:27:29

#104

lazyieg

SR20 Newbie

Join Date: 2007-12-13
Location:
Posts: 26
Trader Score: 0 (0%)

Originally Posted by Clown

try look through the how-to's cuz tokes put up a thread about a side exit exhaust and if i'm not mistaken, a 6 in resonator.

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-27 14:27:00

#105

blairellis Online/offline status of blairellis is unknown

See Rule #5 - HTFU!

Join Date: 2007-12-11
Location: Johnson City, TN
Posts: 3,315
Trader Score: 22 (100%)

You couldn't pay me to use one of those types of mufflers. Thats one of the most non-free flowing mufflers there is.

Grab some ideas from here too:
http://www.sr20-forum.com/showthread.php?t=132

0 Likes

Be the first to like this post.

04 Subaru FXT
https://www.paypal.me/blairellis/5

Originally Posted by Jeremiah
"For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future."

Reply Reply With Quote

2008-01-27 16:37:21

#106

Clown

Egg Advisory Board

Join Date: 2007-12-13
Location: Brisbane, Australia
Posts: 38
Trader Score: 0 (0%)

Originally Posted by lazyieg

try look through the how-to's cuz tokes put up a thread about a side exit exhaust and if i'm not mistaken, a 6 in resonator.

Yeah, I've read through that. It was very helpful.
I do think the 6 inch is pushing it for ground clearance, so I'd rather go a 5 inch.
The tricky part is finding a damn big 5 inch muffler (I'm talking 30 inch body

)

The other question is, can a cat be fitted in front of it by mounting it (the cat) further forward.
There's enough pipe length, but clearance of the shift linkage etc could be a problem.

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-27 21:57:28

#107

rmyc

Member

Join Date: 2007-12-11
Location:
Posts: 736
Trader Score: 5 (100%)

i think u dont get the whole cut off idea.. it's ment so that when u want to race you open it and when driving around town at night you keep it closed. so 3~4 seconds to open isnt much..

Honestly i'm making my own cut off with the DET throttle body

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-27 22:21:20

#108

PEDRONX2k

instagram @dro_sr

Join Date: 2007-12-13
Location: hoffman estates, ILL
Posts: 3,179
Trader Score: 19 (100%)

Originally Posted by rmyc

how????pics plaese

0 Likes

Be the first to like this post.

-pedro

1993 nx2000 sr20VE
1991 nx2000- PARTED OUT
2008 maxda3 hatch
2007 trailblazer LS
2011 Explorer

Reply Reply With Quote

2008-01-28 00:49:33

#109

rmyc

Member

Join Date: 2007-12-11
Location:
Posts: 736
Trader Score: 5 (100%)

havnt mocked it up cuz it's freezing.. but yeah weld a square steel plate and bolt the TB to it

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-01-28 04:06:33

#110

PEDRONX2k

instagram @dro_sr

Join Date: 2007-12-13
Location: hoffman estates, ILL
Posts: 3,179
Trader Score: 19 (100%)

Originally Posted by rmyc

havnt mocked it up cuz it's freezing.. but yeah weld a square steel plate and bolt the TB to it

got any drawings???please elaborate......

0 Likes

Be the first to like this post.

-pedro

1993 nx2000 sr20VE
1991 nx2000- PARTED OUT
2008 maxda3 hatch
2007 trailblazer LS
2011 Explorer

Reply Reply With Quote

First

Last

+ Reply To Thread

Thread Information

There are currently ? users browsing this thread. (? members & ? guests)
StubUserName