98 excel exhaust query - Hyundai Forum: Hyundai Performance Forum
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#1 Old 04-25-2011, 09:49 PM
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Default 98 excel exhaust query

hi so i got a 1998 hyundai excel (with 1.5L DOHC engine) and im looking into getting a whole new exhaust put on it (everything except for the headers).

i have googled and havnt really found a clear answer for what i want. so what i want is a quiet exhaust with a decent amount of back pressure so i dont have problems, still get decent power, but also doesnt affect fuel economy too much.

i was thinking a 2 inch mandrel bent system with a standard cat convertor, and 1 standard muffler (not a high-flow one), or might it be better to get a standard cat convertor with 2 high-flow mufflers maybe?

any other ideas or comments would be much appreciated.

p.s. my car is stock as a rock with no engine work.

cheers
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#2 Old 04-25-2011, 10:12 PM
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two mufflers may not be worth-while for the cost/extra weight. 2" mandrel should be a good choice. in the US, my preference is a Magnaflow muffler (offset inlet and outlet, but a straight through design with baffles on the inside). it might been slightly louder than stock but should be more of a grumble than a buzz or obnoxious racket. the noise should still be very manageable for daily driving.

i don't have too much experience with noise on an NA car (most of mine have been turbocharged) so hopefully one of the other gents can provide some feedback.
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#3 Old 04-26-2011, 12:34 PM
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Back-pressure is bad.

Read this: The truth about exhaust backpressure and torque


What you want is velocity and scavenging. Not back-pressure. Anywhere up to 2.5" should be good with a few bends or 2" if it's a straight-design. This isn't precise information, just ques-stimating.

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#4 Old 04-26-2011, 01:08 PM
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^^ +1 Also scavenging ends after the cat-it should just be as free flowing as possible. Browser Warning
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#5 Old 04-26-2011, 07:53 PM
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props for not going stupid to 3" on a little tiny engine. mandrel bends, doing it right.

backpressure is bad, its about reducing that while keeping the exhaust gas velocity as high as possible. i'm skeptical on scavenging 'ending' after the cat. only reason is that going from smaller pipe to larger dictates that the exhaust gas must slow down - that in turn could reduce the velocity the gas can be ejected from the header/cat. i'm not saying that it isn't true, i'm just curious.
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#6 Old 04-26-2011, 08:07 PM
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Not much else to add as most things have been covered so ill just say this, dont get all crazy with the exhaust man , keep it mild, kinda like these guys.
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#7 Old 04-28-2011, 05:14 AM
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hey thanks everyone for your replies, ill start ringing around exhaust places tomorrow and see what they can do cheers
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#8 Old 04-28-2011, 05:00 PM
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if they do a custom job, plz post pics!!
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#9 Old 04-30-2011, 10:13 PM
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Quote:
Originally Posted by DREROB View Post
Not much else to add as most things have been covered so ill just say this, dont get all crazy with the exhaust man , keep it mild, kinda like these guys.
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