muffler or no muffler - Page 3

**professorblaze** · 7-3-07, 21:16

but we are still in the "forced induction" thread none the less and I am saying that 2.25 isnt enough for the turbo car. 2.25 is enought for a NA. you are correct there

**SXE MX6** · 7-3-07, 21:18

I just skimmed through this quick, and thought I should add to this, as i've gone through a bunch of exhausts on my car, getting one that I like.
Right now, I have a Hybrid (T-bird), with a full 3" downpipe from the turbo, a 3" cat, and a 3" magnaflow muffler.
I personally liked it better without the magnaflow.
It was not loud (compared to my 5.0L with flowmasters)
Or, even compared to my winter beater mx6 with stock turbo and downpipe, 2.5" crushed exhaust, cat, and polished up ricer boy fat can muffler! (ractive maybe)?
I hated that car, it was load as can be, and, well, quite annoying!
I took the muffler off, swaped it for a chrysler minivan resonator, and it was a bit better.

All that being said, the magnaflow gives it a nice deep tone still, but too quite for what I want..
I think next year I may try a 40 series flowmaster.

**SXE MX6** · 7-3-07, 21:20

Quote:

Originally Posted by professorblaze

but we are still in the "forced induction" thread none the less and I am saying that 2.25 isnt enough for the turbo car. 2.25 is enought for a NA. you are correct there

Have you seen how restrictive the factory exhaust elbow is on the downpipe on the turbo???

Theres no way that thing flows more than a 2.25" straight pipe

**boostaddict** · 7-3-07, 21:34

sxemx6, i had 2.25 straight pipe on my 89pgt and it in no way spooled as hard as my 3" side exit. you can blow more air faster though a 1" straw then a 2 foot straw.

**SXE MX6** · 7-3-07, 21:37

Quote:

Originally Posted by boostaddict

sxemx6, i had 2.25 straight pipe on my 89pgt and it in no way spooled as hard as my 3" side exit. you can blow more air faster though a 1" straw then a 2 foot straw.

yea, but if you took 1", and steped it up to 100", you still have to try and blow through an inch......

Thats what I was getting at. That and amybe it wil flow a bit more than 2.25, but i'd doubt if the stoch cast dump would do a whole lot more than that

**boostaddict** · 7-3-07, 21:43

yes, I agree the stock 02 housing on them is a bottleneck, however 3" exhaust will hands down see better boost response than a 2.25" exhaust.

blow through a full straw, see how hard it is, cut a 1/2 piece from that straw tape it to a garden hose and see how much easier that is.

also, by your theory exhaust that is anybigger than the exit for the exhaust side on a turbo is a waste.

**SXE MX6** · 7-3-07, 21:47

Quote:

Originally Posted by boostaddict

yes, I agree the stock 02 housing on them is a bottleneck, however 3" exhaust will hands down see better boost response than a 2.25" exhaust.

blow through a full straw, see how hard it is, cut a 1/2 piece from that straw tape it to a garden hose and see how much easier that is.

also, by your theory exhaust that is anybigger than the exit for the exhaust side on a turbo is a waste.

Yes, I understand what your getting at, my point was though that 2.25 exhaust is, not great, but it will work on a turbo car. (factory isn't much bigger)
On a Factory N/A 4 cyl, anything bigger than that is a waste of power, unless your after that honda ricey fart can sound......
then its cool!!

I vote for some 5" pipe off a greyhoud for that!!

**SixSick6** · 7-4-07, 0:30

Bottom line is that 2.25 is more than enough for a 2.2L engine regardless of it being naturally aspirated or turbo. Hell if you want to get technical, there isn't a need for 3" piping unless you're close to 600+ hp.

**suprafreak2100** · 7-4-07, 0:48

I think the mx6 with open dp sounds really nice

Quote:

Originally Posted by SXE MX6

I vote for some 5" pipe off a greyhoud for that!!

My buddies got a 5inch exhaust on his mustang, and it sounds bad a$$

**SixSick6** · 7-4-07, 9:29

All engines regardless of being naturally aspirated, supercharged, turbocharged have a maximum CFM potential based on rpm and engine displacement:

Our 2.2 barely see's 230 CFM at 6,000 rpm. Based on gas law and thermal dynamics, 99% of piping that you see on "tuners" cars is not needed.

As said, the demand for 3" piping isn't until upwards of 600+ HP:

**professorblaze** · 7-4-07, 9:55

i was planing on going with a 2.5 inch to start instead of the 2.25 and was going to ask the difference but it has been answered...
it does have a lot of hp yet... but i will be modding it quick enough i dont wana put 2 exhausts a year on it

**Zach** · 7-4-07, 10:36

I did the deed yesterday. I'm running no muffler right now...and it's quieter overall, than with my magnaflow. Afterfire's are louder of course, but that's about it.

**TR-mx6** · 7-12-07, 17:18

Quote:

Have you seen how restrictive the factory exhaust elbow is on the downpipe on the turbo???

Theres no way that thing flows more than a 2.25" straight pipe

Mind you that if you had done a backpressure test at the elbow, through the o2 sensor bung hole you would have noticed it has 0psi of backpressure.

**Zach** · 7-12-07, 17:52

Quote:

Originally Posted by TR-mx6

Mind you that if you had done a backpressure test at the elbow, through the o2 sensor bung hole you would have noticed it has 0psi of backpressure.

at idle, or full onset of boost?

**TR-mx6** · 7-14-07, 19:26

at 3000rpm

7-3-07, 21:18	#32 (permalink)
SXE MX6 Join Date: May 2004 Location: , Close to Niagara Falls CA Age: 29 iTrader: (2)	I just skimmed through this quick, and thought I should add to this, as i've gone through a bunch of exhausts on my car, getting one that I like. Right now, I have a Hybrid (T-bird), with a full 3" downpipe from the turbo, a 3" cat, and a 3" magnaflow muffler. I personally liked it better without the magnaflow. It was not loud (compared to my 5.0L with flowmasters) Or, even compared to my winter beater mx6 with stock turbo and downpipe, 2.5" crushed exhaust, cat, and polished up ricer boy fat can muffler! (ractive maybe)? I hated that car, it was load as can be, and, well, quite annoying! I took the muffler off, swaped it for a chrysler minivan resonator, and it was a bit better. All that being said, the magnaflow gives it a nice deep tone still, but too quite for what I want.. I think next year I may try a 40 series flowmaster.
	*Gettin blown by one 19yr old...NICE!! Gettin blown by two...PRICELESS!!* 89 MX6 Turbo......waiting for the road again....someday....maybe!!! 89 626 Turbo Hatch....everyday driver! 89 ZX7 wishing it was turbo...... *Wife's cars-* 2001 Echo(driver) / 1991 GT Mustang(summer)

7-14-07, 19:26	#45 (permalink)
TR-mx6 Rock n' Roll \m/ Join Date: May 2005 Location: , Canada Age: 23 iTrader: (0)	at 3000rpm
	Keepin' it Heavy www.myspace.com/trrock Check us out!

7-3-07, 21:16	#31 (permalink)
professorblaze That soldier boy Join Date: Jun 2007 Location: Lakewood, WA, USA Age: 26 iTrader: (10)	but we are still in the "forced induction" thread none the less and I am saying that 2.25 isnt enough for the turbo car. 2.25 is enought for a NA. you are correct there

7-3-07, 21:34	#34 (permalink)
boostaddict Join Date: Jun 2006 Location: London, Canada Age: 22 iTrader: (0)	sxemx6, i had 2.25 straight pipe on my 89pgt and it in no way spooled as hard as my 3" side exit. you can blow more air faster though a 1" straw then a 2 foot straw.

7-3-07, 21:43	#36 (permalink)
boostaddict Join Date: Jun 2006 Location: London, Canada Age: 22 iTrader: (0)	yes, I agree the stock 02 housing on them is a bottleneck, however 3" exhaust will hands down see better boost response than a 2.25" exhaust. blow through a full straw, see how hard it is, cut a 1/2 piece from that straw tape it to a garden hose and see how much easier that is. also, by your theory exhaust that is anybigger than the exit for the exhaust side on a turbo is a waste.

7-4-07, 9:55	#41 (permalink)
professorblaze That soldier boy Join Date: Jun 2007 Location: Lakewood, WA, USA Age: 26 iTrader: (10)	i was planing on going with a 2.5 inch to start instead of the 2.25 and was going to ask the difference but it has been answered... it does have a lot of hp yet... but i will be modding it quick enough i dont wana put 2 exhausts a year on it