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Old 10-19-2006, 11:43 AM   #1
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svt dual exhaust?

Where can I get such a thing and is it anygood? lol


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Old 10-19-2006, 11:49 AM   #2
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The SEARCH button found all sorts of things.

Dual Exhaust
dual exhaust on svt focus??
SVT Dual Exhaust
Dual Exhaust?
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Old 10-19-2006, 11:50 AM   #3
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Personally I would buy a Borla, then have a shop fab a 2.5" Y pipe on as it fits and just stick on another Borla chrome tip. I don't know of any companies that actually sell them, and personally I think it would be a waste of your time unless you're going FI and flow actually matters. Even then you're better off spending the cash on a custom 3" cat back exhaust with a 2.5" ORP replacing the cat.
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Old 10-19-2006, 01:29 PM   #4
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If you do get it. Most people will make fun of it, say its a waste, just a for warning. Apparently its "rice". Done right it looks awesome if you ask me, dual tips just fit so well with the SVT rear end. You wont see any gains from a performance stand point but aesthetically I think it looks better. Not sure who's this is but it looks amazing and very well done.


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Old 10-19-2006, 09:40 PM   #5
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Old 10-20-2006, 01:03 AM   #6
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Looks good, but I hear you may loose some power on backpressure.
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Old 10-20-2006, 12:50 PM   #7
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Quote:
Originally posted by Focistang85
Looks good, but I hear you may loose some power on backpressure.
I wouldnt imagine. If you had 3in catback maybe, but I doubt adding another tip would do much of anything.
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Old 10-20-2006, 02:06 PM   #8
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Quote:
Originally posted by HTPerformance
I like.
backpressure is bad. period. read this:


Don't waste your time trying to figure it out. its a MYTH that contradicts the most basic concepts of internal combustion engines.

1) Backpressure is the parasitic load added to the upstroke of the piston, trying to push the spent gasses out of the cylinder. The more power wasted pushing gasses out of the cylinder, the less power there is available to turn the crank.

2) Backpressure is the residual gasses that remain in the cylinder after the exhaust stroke has finished, and interferes with the induction of the fresh charge. Obviously, the less fresh charge the engine gets, the less power it can produce.

The optimum backpressure is zero. How much back pressure do you think is designed into NASCAR racers, Indy cars, dragsters, racing boats,...etc.

People confuse backpressure with scavenging. Scavenging is GOOD (it lowers backpressure), but backpressure is BAD.

And it makes no difference whether you are talking forced induction, N/A, 2 cycle, 4 cycle, diesel, planes, boats, cars, cycle, or lawn mowers.

and about scavenging:

Velocity is a component of the scavenging effect of a tuned exhaust. But scavenging ONLY takes place it the interface of differnt pulse discharges. As the exhaust from one cylinder passes across the exhaust tube of another cylinder, it will lower the pressure in that tube, and in another poster's words, "help suck it out".

So the objective of exhaust tuning is to configure the individual tubes so the exhaust flow pass the tubes from other cylinders at exactly the right time. And the velocity at that point does indeed influence the amount of scavenging assist.

But please note that this scavenging only occurs at the interface of different cylinders. It only takes place in the tuned header section of the exhaust system. Once all of tubing and all of the discharges have come together in a common collector or pipe, there is no scavenging, and velocity is no longer a factor.

The principles involved in designing "tuned exhaust system" (actually headers or extractors) do NOT apply to exhaust system in general.

The more quickly and efficiently exhaust gasses can leave the combustion chamber, the more power you can make. And the quickest and most efficient path is one with zero back pressure (or even a slight vacuum, which may be achieved with a tuned header/extractor).
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Old 10-20-2006, 02:52 PM   #9
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Correct me if Iam wrong but I remember reading something about the new Z06 has some sort of system which at the back end of the exhaust system a small valve is closed a bit creating more back pressure at low rpms to help torque output but when the RPMS get higher it opens up the exhaust completely.
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Old 10-20-2006, 03:39 PM   #10
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what? anyone else find the statement by jerzefigga choppy?
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