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Dual Exhaust on BF II - Loss of Power? 

 

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 Post subject: Re: Dual Exhaust on BF II - Loss of Power?
Posted: Wed Mar 10, 2010 10:12 pm 
Getting Side Ways
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You wont loose power, but you will loose performance, just simply from the extra weight of the doubled-up piping

I find it funny that exhaust fitters, which requires no experience in anything, are suddenly experts on fluid dynamics and gas velocity after starting the job :lol:

I think you will find that a quality system, of smaller diameter, will generally flow better, and give more power, than a s**t backyard large diameter twin system.

 

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 Post subject: Re: Dual Exhaust on BF II - Loss of Power?
Posted: Wed Mar 10, 2010 10:47 pm 
Getting Side Ways
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Sturmovik wrote:
You wont loose power, but you will loose performance, just simply from the extra weight of the doubled-up piping

I find it funny that exhaust fitters, which requires no experience in anything, are suddenly experts on fluid dynamics and gas velocity after starting the job :lol:

I think you will find that a quality system, of smaller diameter, will generally flow better, and give more power, than a s**t backyard large diameter twin system.



I think you'll find about 2hp difference between the best and worst quality off the shelf systems. (given like muffler design) the noise would differ a bit more.
As ALL of them are just a 2.5inch bit of pipe bent to fit under a falcon with a muffler or two jammed in there.

How many people here have any practical experience with exhaust systems?
(and i'm not talking about buying a premade system and bolting it one. I also don't mean who has worked in an exhaust shop)
I'm talking about actually sitting down designing and building the system and then proving the results through what ever means.

 

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 Post subject: Re: Dual Exhaust on BF II - Loss of Power?
Posted: Thu Mar 11, 2010 7:50 am 
Getting Side Ways
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I was going to reply to this thread, but then I couldn't be f**k, looks like the pro's are all over it.

Nathfox wrote:
you need that pressure in there.


FAST-XR wrote:
back pressure is caused by restriction, so if you want air speed through your exhaust your going to introduce turbulance, which is going to add back pressure.... one is related to the other


Nathfox wrote:
I've got my bible, it's a bommadore magazine :oops: :lol:


FAST-XR wrote:
id like to see a 100rwkw v6 improve its performace by adding a 3" exhaust

 

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