:::RHMT::: Real Home Made Turbo

General Category => Forced Induction => Topic started by: patsmx5 on June 11, 2009, 07:52:53 PM

Title: QUIET exhaust....
Post by: patsmx5 on June 11, 2009, 07:52:53 PM
So I've been trying to build a sleeper all along. IC is hidden behind the A/C condenser, stock body, but it had aftermarket wheels and a 3" pipe out the back before. And if you looked under the back, you could see it had full 3" exhaust. It wasn't terribly loud, but it wasn't exactly quiet. It was pretty loud in boost, or low speed high load driving.

Well, I finally found a set of factory 15's so it looked stock cept for the 3" exhaust.

So I put the stock muffler on. I cut up a factory header a while back to add a 3" collector to it and saved the 3" to 2" reducer. It came in handy.  :) Fluxcored...

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi231.photobucket.com%2Falbums%2Fee155%2Fpatsmx5%2F100_0269.jpg&hash=b54cb4a406c10379df09150e1912c41dabd7a2e7)

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi231.photobucket.com%2Falbums%2Fee155%2Fpatsmx5%2F100_0270.jpg&hash=deb122f0ab3cfb57b236d99fe973bcf1c1d8469a)

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi231.photobucket.com%2Falbums%2Fee155%2Fpatsmx5%2F100_0272-1.jpg&hash=31e56b73dc0a0dc178efc569cad311e7ea58e47d)

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi231.photobucket.com%2Falbums%2Fee155%2Fpatsmx5%2F100_0268.jpg&hash=303521aff3c49207077c89c4be5c355cbc206638)

Shit is damn near silent. I hear road noise now. And something in the front end makes a slight clunk when I tap the brakes. But idle, full boost, anything the exhaust is almost silent.

But it did kill the power in full boost. Probably went from 270whp to 220-230. Gonna turn up the boost to compensate.  :yes: :noel: 8) But off boost, or low boost the power is the same as before.

Noteworthy, I borrowed a fluxcore to do this. Day after I bought a Miller 130 with two whips, two spools of wire, and a cart to roll it around on for 250. Bought a bottle of argon too so it's ready to go.
Title: Re: QUIET exhaust....
Post by: glustic on June 11, 2009, 08:13:29 PM
Thats gonna create a lot of backpressure... Haha.
Title: Re: QUIET exhaust....
Post by: E-b0la on June 11, 2009, 08:49:20 PM
buy a different muffler. fuck that stock crap.
Title: Re: QUIET exhaust....
Post by: patsmx5 on June 11, 2009, 09:07:51 PM
Yeah, I thought about putting a different muffler. But I wanted it almost silent, not a little better. You quite literally can't hear the exhaust anymore. And there's an RHMT way to get the power back at the flip of a switch.  :noel: Coming soon...
Title: Re: QUIET exhaust....
Post by: glustic on June 11, 2009, 09:51:34 PM
Yeah, I thought about putting a different muffler. But I wanted it almost silent, not a little better. You quite literally can't hear the exhaust anymore. And there's an RHMT way to get the power back at the flip of a switch.  :noel: Coming soon...

Ballin! QTP? Oh wait this is RHMT, are you using a TB? haha.
Title: Re: QUIET exhaust....
Post by: patsmx5 on June 11, 2009, 11:41:59 PM
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi231.photobucket.com%2Falbums%2Fee155%2Fpatsmx5%2F100_0298.jpg&hash=fdcd444ca7490318ab3b3ab31f26c12b16455999)

Title: Re: QUIET exhaust....
Post by: caged on June 12, 2009, 02:52:13 AM
Im not digging the new exhaust ::). Why dont you build your own muffler where the oem one is and have a fake pipe out the back. Thats what iv got, its quet as a stocker at idle and low load and quiet loud under full load.
Title: Re: QUIET exhaust....
Post by: t_cel_t on June 12, 2009, 03:39:44 AM
isnt that like $150 worth of cherry bombs?
Title: Re: QUIET exhaust....
Post by: patsmx5 on June 12, 2009, 12:22:17 PM
Im not digging the new exhaust ::). Why dont you build your own muffler where the oem one is and have a fake pipe out the back. Thats what iv got, its quet as a stocker at idle and low load and quiet loud under full load.
I'm looking for another 99' muffler to cut up. I wanna see how it's designed, and see if it can be modified with something like a wastegate or cutout inside so it will breathe when I want it to, but be quieter than stock when I want it quiet. And those glasspacks were 90 I think from performance pedeler.

Title: Re: QUIET exhaust....
Post by: Teg2boo on June 12, 2009, 03:35:54 PM
isnt that like $150 worth of cherry bombs?

That was my first thought. I don't  know if running 4 muffler will hurt performance   :-X
Title: Re: QUIET exhaust....
Post by: AstroVannin on June 13, 2009, 09:42:25 AM
I like it... I was thinking of doing somthing like that on the Accord ... the Magnaslow is killing my brain.

Tractor mufflers are cheaper BTW
Title: Re: QUIET exhaust....
Post by: HiProfile on June 13, 2009, 09:42:08 PM
Stock muffler + cutout = win. I've had a 3" with 2 mufflers, and I laugh at ppl who say that is a quiet setup - it's quiet like a shotgun in a library. I have a similar deal as you - 3" down the centerline, then stock pipe/muffler after. An e-cutout is on the 3" section just before the gas tank. My unadjusted rockers are louder than the exhaust. :?: Whats weird is my boost level is HALF for a given EBC duty cycle when the cutout is closed.


I'm going to do a quasi write-up soon, complete with the circuit.

http://www.realhomemadeturbo.com/forum/index.php?topic=276.0 (http://www.realhomemadeturbo.com/forum/index.php?topic=276.0)
Title: Re: QUIET exhaust....
Post by: patsmx5 on June 13, 2009, 10:49:41 PM
Stock muffler + cutout = win. I've had a 3" with 2 mufflers, and I laugh at ppl who say that is a quiet setup - it's quiet like a shotgun in a library. I have a similar deal as you - 3" down the centerline, then stock pipe/muffler after. An e-cutout is on the 3" section just before the gas tank. My unadjusted rockers are louder than the exhaust. :?: Whats weird is my boost level is HALF for a given EBC duty cycle when the cutout is closed.


I'm going to do a quasi write-up soon, complete with the circuit.

http://www.realhomemadeturbo.com/forum/index.php?topic=276.0 (http://www.realhomemadeturbo.com/forum/index.php?topic=276.0)
Someone understands!!!!! All the miata folks run a similar exhaust as my old one and swear a 22" core magnaflow replacing my previous 18" magnaflow will make it as quiet as stock. Yeah, I'm gonna call BULLSHIT on that. Maybe quiet at idle, but that's it. I need not a headache every time I drive the car. And agreed, I'm hearing all kinds of shit I never heard before.  8)

And get the circuits posted  :-*
Title: Re: QUIET exhaust....
Post by: HiProfile on June 15, 2009, 11:24:00 PM
If you add a cutout, make sure you keep it 3" to the cutout, afterwards it doesn't matter how hagard the piping is. Put it on the spot closest to camera in that pic above.

BTW the circuit is posted, along with an NA vs Turbo vid I made quickly.
Title: Re: QUIET exhaust....
Post by: 7808 on June 30, 2009, 01:04:15 PM
looks like you just need a bigger downpipe.

is there a fuckin pit dug out under that ?  if so thats titeeee
Title: Re: QUIET exhaust....
Post by: d-rail on July 02, 2009, 05:36:34 AM
Quiet is overrated. Cops are your friends.