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Stock exhaust questions? 

 

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 Post subject: Stock exhaust questions?
Posted: Tue Aug 10, 2010 11:49 am 
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Hey fellas, Im curious about the standard exhaust.

I'm wondering if there is much restriction in the mufflers on the stock exhaust... I was thinking of removing a muffler or so.. If it would give an increase in fuel economy that is, I don't really want it to be noisy.

Car is an EF Fairmont with an AU motor.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 12:49 pm 
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a cat back exhaust on a stock motor isnt going to gain you any power, and if your not gaining any power then you wont gain any fuel economy...

although on the other hand a good set of extractors would see increased economy... but im sure they would rust out before you can recoup the outlay in savings :)

out of curiosity, what is your average fuel consumption like?

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:08 pm 
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Lol yeah I was pretty sure the only gains I would see would be out of a nice set of extractors, Maybe later lol

well my consumption is very good so I probably shouldn't screw with this car...

Highway: 7-7.5L per 100
Town 11-12L per 100

My combined economy is 10.8L at the moment with average speed of 42km/h

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:13 pm 
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your not going to get much better than that! thats good economy for ANY falcon

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:14 pm 
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Stock factory mufflers were triple pass.....XR6 mufflers were angular pass, straight through.
Std factory exhaust were 2&1/4", XR6 were 2&1/2".
Go figure.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:18 pm 
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[quote="cjh"]Std factory exhaust were 2&1/4", XR6 were 2&1/2".
quote]
how sure are you about that??????????????????

my EL XR6 had a 2.25" :wink:

 

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Last edited by FAST-XR on Tue Aug 10, 2010 1:27 pm, edited 1 time in total.

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:20 pm 
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FAST-XR wrote:
your not going to get much better than that! thats good economy for ANY falcon


Lol yeah I was looking at figures for newer falcons, Mines is up there...

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 1:22 pm 
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Im positive XR's never got 2 1/2" exhausts.

Think i'll just leave my car alone, Until the modification bug bites me again lol, The last sting I got I ended up with a BF motor in an EB :mrgreen:

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:35 pm 
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i got an old street ford mag with a NA6 AU falcon. Stock it pulled 97rwkw and with the 2.5" catback it pulled 106-107rwkw. So there is an increase but mainly up top.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:37 pm 
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Lol holy s**t thats crap power... Surely my car has more then that... The ef doesn't seem that gutless.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:38 pm 
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edfairmont4.0 wrote:
Lol holy s**t thats crap power... Surely my car has more then that... The ef doesn't seem that gutless.


haha could be a harsh dyno. But still it shows it has gained power.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:40 pm 
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yeah that's true.

I wouldn't mind an exhaust on the EF just to give it some more poke, But I dont want it to have noise.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:41 pm 
Getting Side Ways
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edfairmont4.0 wrote:
yeah that's true.

I wouldn't mind an exhaust on the EF just to give it some more poke, But I dont want it to have noise.


haha yeah. Iv had mine quieten down. I got sick of the noise.

 

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EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 3:59 pm 
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FAST-XR wrote:
cjh wrote:
Std factory exhaust were 2&1/4", XR6 were 2&1/2".
quote]
how sure are you about that??????????????????

my EL XR6 had a 2.25" :wink:


XR6 should have a 2.5" press bent exhaust, std are 2.25" press bent.


For the money its not worth removing a box or two, just get a catback with 2 mufflers.

 

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 Post subject: Re: Stock exhaust questions?
Posted: Tue Aug 10, 2010 4:09 pm 
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I think down the track, I'll get a some tuned length Extractors + a quiet exhaust.

 

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