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Can dual exhaust harm the engine?

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Mustang Forums >> Ford Mustang Tech >> 2005 - 2008 Mustangs >> 4.0L V6 Specific >> Drivetrain Performance >> Can dual exhaust harm the engine? Page: [1] 2   next >   >>
[Poll]

Can dual exhaust harm the engine?


Go for dual exhaust! It won't hurt the engine.
  86% (39)
Stick with a single just to be safe.
  13% (6)


Total Votes : 45


(last vote on : 8/20/2007 2:54:18 PM)
(Poll will run till: -- )
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Can dual exhaust harm the engine? - 7/24/2006 3:37:01 PM   
Ken Rogers


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I hesitate to put dual exhaust in my V6. Will the reduced back pressure be enough to keep the engine happy? I don't care about the warranty because the warranty only lasts a few years, but I'd like to get many, many years out of this engine.

I've heard many opinions, but is there anything factual out there? Maybe a poll will shed some light on this.

Ken
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RE: Can dual exhaust harm the engine? - 7/24/2006 3:40:58 PM   
Jeremy


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Who told you it would hurt the engine?

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RE: Can dual exhaust harm the engine? - 7/24/2006 3:45:51 PM   
Ken Rogers


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I told a few friends about my plans, and they both questioned me about whether there'd be enough back pressure. They aren't experts or anything, but knowledgeable enough to make me have doubts. I plan to go with the majority poll here, and would appreciate any technical comments anyone wishes to make.

Ken

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RE: Can dual exhaust harm the engine? - 7/24/2006 3:50:42 PM   
chrisc


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it wont harm the engine, but too much lack of back pressure will reduce rwhp. many people here have good setups that have made some good gains, but the best are still from the singles. i sya go with duals because they look really good

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RE: Can dual exhaust harm the engine? - 7/24/2006 3:54:44 PM   
Derf00

 

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mmmm...misnomers abound.

Just putting dual exhaust on your car will hurt nothing. However, you should consider the diameter you use and go no larger than 2 1/4inch. Any larger and you will hurt the cars performance. In stock form you will lose a few HP on the low end but will more than make up for it at higher RPM.

While there is such a thing as not-enough back pressure, it does not physically damage your motor. Only the performance.

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RE: Can dual exhaust harm the engine? - 7/24/2006 4:02:25 PM   
Ken Rogers


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quote:

ORIGINAL: Derf00

mmmm...misnomers abound.

Just putting dual exhaust on your car will hurt nothing. However, you should consider the diameter you use and go no larger than 2 1/4inch. Any larger and you will hurt the cars performance. In stock form you will lose a few HP on the low end but will more than make up for it at higher RPM.

While there is such a thing as not-enough back pressure, it does not physically damage your motor. Only the performance.


Okay, my plan is to take it in and get a shop to do everything (I already have the GT takeoffs). Are you talking about all of the piping being 2 1/4, or just what is upstream from the cats (which I won't be touching)?

Also, I have one left hanger from the right side. Do I just need to go and buy one single hanger for $40 and I'm all set?

Ken

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RE: Can dual exhaust harm the engine? - 7/24/2006 4:05:05 PM   
Derf00

 

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2 1/4 Inner diameter. You will lose some bottom end oomph with 2 1/2 but you'll make up for it on the top end. You should be able to use the existing hangers and just buy the additional one and be fine. I'm not certain though since I haven't seen the underside of the 05+ models though.

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RE: Can dual exhaust harm the engine? - 7/24/2006 6:14:26 PM   
ricklmesa@cox.net


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I lost nothing with dual's. Some say you'll loose the bottm end but when I got duals with x pipe it was harder to take off like it was more open/powerful in the bottom end. Couldn't stop the wheel from breaking loose LOL Don't worry too much about it. Its a 4.0L V6 not a 2.8LV6 or a 2.0 or 2.4 V4's. Don't get it twisted though, dual exhaust is not needed on our engines to exceed performance. Just look at screamin & fazm. They have some of the best times for our cars on these forums and they still have single exhaust. Basically its not a must have like how it is on a V8, But it will not hurt the performance of the car and it will sound better in my opinion.

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RE: Can dual exhaust harm the engine? - 7/24/2006 6:23:42 PM   
blackfoot


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lol WE ARE NOT DRIVING HONDAS

lol we have enough displacement to make power off the headers alone with no exhaust system lol

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Post #: 9
RE: Can dual exhaust harm the engine? - 7/24/2006 6:39:56 PM   
ricklmesa@cox.net


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quote:

ORIGINAL: blackfoot

lol WE ARE NOT DRIVING HONDAS

lol we have enough displacement to make power off the headers alone with no exhaust system lol

Yea, pretty much what I was trying to say LOL

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Procharger
298whp 299wtq @7 psi wintertune
301whp 300 wtq @9-10 psi summertune
JBA Exhaust (X pipe)
JBA Headers
ADC Custom Tune
Steeda Shifter
CHE LCA's, UCA
CHE K-member Brace(to be installed)
3:73's & tlok
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RE: Can dual exhaust harm the engine? - 7/24/2006 6:42:03 PM   
ricklmesa@cox.net


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Does screamin still have his single exaust? He did go Vortech, Did he still keep it single? I love it if he did!!! He never did really see the point of going to dual's LOL

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Procharger
298whp 299wtq @7 psi wintertune
301whp 300 wtq @9-10 psi summertune
JBA Exhaust (X pipe)
JBA Headers
ADC Custom Tune
Steeda Shifter
CHE LCA's, UCA
CHE K-member Brace(to be installed)
3:73's & tlok
PH Driveshaft

(in reply to ricklmesa@cox.net)
Post #: 11
RE: Can dual exhaust harm the engine? - 7/24/2006 7:30:00 PM   
Ken Rogers


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OK, sounds like my concerns are a total non-issue. Thanks all for the info.

Ken

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Post #: 12
RE: Can dual exhaust harm the engine? - 7/24/2006 9:21:41 PM   
scrming


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quote:

ORIGINAL: ricklmesa@cox.net

Does screamin still have his single exaust? He did go Vortech, Did he still keep it single? I love it if he did!!! He never did really see the point of going to dual's LOL


Yep... I'm still running a single... The Mistress will always be a single exhaust... LOL! To much fun when the ricers come up behind me and think i'm a dressed up V6 and and an easy target... LOL

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RE: Can dual exhaust harm the engine? - 7/24/2006 9:28:03 PM   
ricklmesa@cox.net


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Yep... I'm still running a single... The Mistress will always be a single exhaust... LOL! To much fun when the ricers come up behind me and think i'm a dressed up V6 and and an easy target... LOL
[/quote]


Nice!! I love it. I've been enjoing the procharger even thought it has a small leak. gunna get it in a month or so but I want to enjoy it for a little bit before I send it back and haft to drive NA for a month ya know.

Hey wanted to ask you a question. Are you going to run headers eventually? Do you think its worth it being FI'd? I see you and rygen have not done them yet and if there were any benifit to them FI you guys would be the first to have done them. Is it not worth it even FI ya think?


_____________________________

Procharger
298whp 299wtq @7 psi wintertune
301whp 300 wtq @9-10 psi summertune
JBA Exhaust (X pipe)
JBA Headers
ADC Custom Tune
Steeda Shifter
CHE LCA's, UCA
CHE K-member Brace(to be installed)
3:73's & tlok
PH Driveshaft

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Post #: 14
RE: Can dual exhaust harm the engine? - 7/24/2006 9:34:16 PM   
scrming


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quote:

ORIGINAL: ricklmesa@cox.net


Yep... I'm still running a single... The Mistress will always be a single exhaust... LOL! To much fun when the ricers come up behind me and think i'm a dressed up V6 and and an easy target... LOL



Nice!! I love it. I've been enjoing the procharger even thought it has a small leak. gunna get it in a month or so but I want to enjoy it for a little bit before I send it back and haft to drive NA for a month ya know.

Hey wanted to ask you a question. Are you going to run headers eventually? Do you think its worth it being FI'd? I see you and rygen have not done them yet and if there were any benifit to them FI you guys would be the first to have done them. Is it not worth it even FI ya think?



I really think the next big bottle neck is the cats... not the stock manifolds... when it's time to put the rebuilt motor in we'll probabl look at headers... but until then no plans for headers...

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RE: Can dual exhaust harm the engine? - 7/24/2006 10:10:51 PM   
DragonPL

 

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Duals will help the V6, there good on any V( ) cars....I dont know why the 4.0 do not come stock with dual exhausts.......

< Message edited by DragonPL -- 7/24/2006 10:13:43 PM >

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RE: Can dual exhaust harm the engine? - 7/25/2006 7:22:04 AM   
scrming


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quote:

ORIGINAL: DragonPL

Duals will help the V6, there good on any V( ) cars....I dont know why the 4.0 do not come stock with dual exhausts.......


Duals on a stock 4.0L are really not beneficial... couple of HP.. not worth the extra expense... Simply replace the stock muffler with a good aftermarket muffler... (LIke the MRT Aeroturbine! LOL!).

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RE: Can dual exhaust harm the engine? - 7/25/2006 11:18:46 AM   
Thomas Ford


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Mustangs just don't look right with single exhausts. ITS A MUSCLE CAR MAN!! They should all come with duals stock but Ford saves money just with a single setup. Look at all the muscle cars in the older movies, the all have duals, looks and slightly better performance is worth the money. And no it won't hurt the engine one bit if anything it breathes better.
Tom

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RE: Can dual exhaust harm the engine? - 7/25/2006 12:49:06 PM   
scrming


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quote:

ORIGINAL: Thomas Ford

Mustangs just don't look right with single exhausts. ITS A MUSCLE CAR MAN!! They should all come with duals stock but Ford saves money just with a single setup. Look at all the muscle cars in the older movies, the all have duals, looks and slightly better performance is worth the money. And no it won't hurt the engine one bit if anything it breathes better.
Tom


A very wise person explained it this way to me...

People see dual exhaust and they EXPECT a big V8 sound. You will NEVER get a V8 sound out of our cars... it is physically impossible! So instead of disappointing them why not make a mean sounding single and surprise them?

The V6 has always been a single AFAIK... I plan to keep with that tradition! LOL!



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RE: Can dual exhaust harm the engine? - 7/25/2006 1:15:24 PM   
Ken Rogers


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quote:

ORIGINAL: scrming

quote:

ORIGINAL: Thomas Ford

Mustangs just don't look right with single exhausts. ITS A MUSCLE CAR MAN!! They should all come with duals stock but Ford saves money just with a single setup. Look at all the muscle cars in the older movies, the all have duals, looks and slightly better performance is worth the money. And no it won't hurt the engine one bit if anything it breathes better.
Tom


A very wise person explained it this way to me...

People see dual exhaust and they EXPECT a big V8 sound. You will NEVER get a V8 sound out of our cars... it is physically impossible! So instead of disappointing them why not make a mean sounding single and surprise them?

The V6 has always been a single AFAIK... I plan to keep with that tradition! LOL!




I'm doing it mostly for looks, and hopefully a sound improvement. If I get any extra ponies, that's a bonus. I'm sure a Mustang buff will be able spot my V6 a mile away say "Hey, that 'aint no GT, it's much too quiet, and check out the pony grille". Everybody else will just think it's a sweet-looking ride.

BTW I'm having second thoughts about louvers and stripes. Gonna keep it simple.

Ken


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