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SVT Performance (2002-2004) The place to chat about any 2.0L SVT DOHC Zetec engine performance, tuning and exhaust related upgrades.

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Old 02-27-2005, 12:28 AM   #1
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exhaust for a svt

aight so first of all what is a off road pipe...like something in between the exhaust and like the engine?...all i really plan on for performance wise when i get my svt is CAI and exhaust...or something...know that im not going to do anything big under the hood, the stock exhaust is 2.5 inches...where is the constrictive part...id like to add something for a little bit of sound in the ass area and im not gonna turn down performace...I took a SVT for a spin today and the guy sellin it said that putting a intake and exhaust on will at 13 whp...i have no problems with the look of the stock exhaust...let me know...ive heard a little bit about that the ORP is an issue of restraint...


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Old 02-27-2005, 12:40 AM   #2
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An ORP is an Off Road Pipe. This replaces the stock cat (as in, there will be no more cat on the car). This provides good gains, but technically, it is illegal. Also, the sound is not for everyone. Still, this is the only part of the exhaust that tinkering with will yield any real gains.

The stock exhaust is 2.5" at the flex. Then it tapers down to 2.28" from there on back. It flows really well, so I'd only change it if you don't like the sound of the stock system.

Your salesman is probably telling you 13 whp with an intake, catback, and ORP. You will not see those kind of gains without the ORP. A highflow cat will get you closer, but the stock catback just isn't restrictive enough to contain any 'free' horsepower.
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Old 02-27-2005, 06:58 PM   #3
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Re: exhaust for a svt

Quote:
Originally posted by Iceboy9191
I took a SVT for a spin today and the guy sellin it said that putting a intake and exhaust on will at 13 whp
that's just plain BS..........intake maybe 2 or 3 whp, and the exhaust even less, considering how freely flowing it is already.........now the ORP will give you gains, but even with that, you wouldn't get 13 whp
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Old 02-27-2005, 07:15 PM   #4
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I've also heard that with an ORP you'll loose torque but will gain some HP. Like stated before the stock exhaust on a SVT is pretty free flowing as it is. What i would recommend is a Flash for the SVT to help with gains and help with some of the sugring problems found the SVT's. There's the Predator tune and the SCT tune. From what i hear (and i hope not to start arguements again) the Predator from Turbo Tom is about the best one out there for the data logging feature and the ability to read/erase codes on your car. It about $150 more than the other flasher but it's worth it from what i hear. A Under Drive Pulley will also help you with some gaines. a Cold Air Intake will also help you out with some gaines. Maybe with all of those will help you with about 10whp but you're looking at about $800 give or take on which route you take.
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Old 03-01-2005, 01:34 PM   #5
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The stock cat does not rob horsepower. Catalytic converters only kill power on the base zetec motors because it's snuggled up so close to the motor. the svt however locates it's cat under the floor thus not robbing power. here, read this link: http://sportcompactcarweb.com/projec...scc_projfocus/

read the part under JBA header. before you waste your money on a straight pipe, understand you're only paying for the noise you get for removing a cat that is very much your friend.
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Old 03-01-2005, 01:58 PM   #6
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I have to say that I am not in favor of removing cats. I myself will never install an ORP. For one, it's illegal. And since the law is a Federal law, if convicted, it is a felony (correct me if I am wrong). Also, the cat is helping the environment. As SVTkonig stated above, the cat is VERY much your friend and I would highly recommend keeping it :-). Anyway, just my 2 shillings
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Old 03-01-2005, 02:04 PM   #7
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then why do we have hi-flow cats if are cats are perfect?

like going with a shorty header and a high flow cat and a bigger flex? Yeah you can keep the stock cat but you're going to kill the internals of the cat after awhile. That article is for a ZX3 and not a SVT. Yes if you remove the cat it can hurt the enviorment and i don't recommend it but some people have and have noticed more high end 'umph' but no low end....correct me if i'm wrong....
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Old 03-01-2005, 08:54 PM   #8
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the reason for the high flow cat is
A) People want a louder exhaust
B) A small percentage may need it if they are going FI with a crazy amount of power, in that case the exhaust MAY be a bottleneck.

I am opting to keep the exhaust, it is loud enough and i can spend 300-500 bux on something that actually makes a difference.
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Old 03-01-2005, 09:01 PM   #9
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that's for a SVT yes. but still isn't true that if you put a shorty header on a non-SVT zetec then you're basically blow the internals out in your stock cat in no time. The SVT's exhaust is the best one there is around, thanks to cosworth.
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Old 03-01-2005, 10:04 PM   #10
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This has been discussed before. The stock piping on the SVT is pretty damn good and changing the exhaust note is not worth $300-$500.

You can have the last muffler removed and the second to last muffler replaced with one of your choice for under $100. That'll change the exhaust note, look a little customized depending on the tip you go with, and just maybe net a hp or two.

Check it: http://www.focusfanatics.com/forum/showt...threadid=36765
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