Does bigger piping increse or decrease the hp in 02 lx?
07-28-2003
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Does bigger piping increse or decrease the hp in 02 lx?
Anyone know if the horsepower in a lx 5-speed 02, decreases or increases when you make ur piping bigger for your exhaust. Because I already have a HKS rear section, but i barely noticed the difference since my SRI is so damn loud, and rear sections dont add much horsepower. So I thought I should make my piping bigger from the headers up to the rear. thanx...
07-28-2003
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a little bit bigger improves exaust flow, but you dont want to go too big, as that allows the exaust to cool down. cooler exaust is denser exaust/heavyier exaust. which makes your engine work harder to get it out of the pipe.
07-28-2003
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Rep Power: 0 yea... 2 and 1/4 inches for the diameter of the piping is just about right... you don't want it too big unless you have forced induction
edit: make sure you get a resonator put in the piping or else your car will sound like a weed wacker
edit: make sure you get a resonator put in the piping or else your car will sound like a weed wacker
Last edited by CivicHX01; 07-29-2003 at 12:15 AM.
07-29-2003
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Rep Power: 0 bigger does not necessarily mean better... the exhaust gases come out in pulses (feel the air coming out of the exhaust pipe and you'll know what i'm talking about) and in order for the gases to efficiently move out they need to be in a straight line one right after the other... if your piping is too big, the small pulses (FI will cause bigger pulses) will just ricochet off the walls back and forth and end up traveling a farther distance than they were meant to causing less hp...
well i guess you get the point and i got a little carried away...
well i guess you get the point and i got a little carried away...
Last edited by CivicHX01; 07-29-2003 at 12:38 AM.
07-29-2003
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Rep Power: 350 Originally posted by CivicHX01
yea... 2 and 1/4 inches for the diameter of the piping is just about right... you don't want it too big unless you have forced induction
edit: make sure you get a resonator put in the piping or else your car will sound like a weed wacker
yea... 2 and 1/4 inches for the diameter of the piping is just about right... you don't want it too big unless you have forced induction
edit: make sure you get a resonator put in the piping or else your car will sound like a weed wacker
I thought about it today and what the hell are people using...i heard a del sol with an actual fart can...it sounded horrible...how is that different from all the other exhausts that sound deep and nice
07-29-2003
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Rep Power: 0 like i said... the resonator is the difference...
if you just use piping from the cat all the way to the muffler it will be much louder resulting in the fart can noise at high rpm... if you put a resonator it will help quiet it down a bit and help to keep the deep sound at high rpm,
it shouldnt cause a loss in hp as long as the resonator's diameter in the inside is the same as the piping because resonators should not be restrictive in nature... (i.e. 2 1/4 resonator works with 2 1/4 piping)
if you just use piping from the cat all the way to the muffler it will be much louder resulting in the fart can noise at high rpm... if you put a resonator it will help quiet it down a bit and help to keep the deep sound at high rpm,
it shouldnt cause a loss in hp as long as the resonator's diameter in the inside is the same as the piping because resonators should not be restrictive in nature... (i.e. 2 1/4 resonator works with 2 1/4 piping)
07-29-2003
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Rep Power: 0 also some mufflers use "glass packs" where the material inside is made of fiberglass which wears off over time and burns off... once this wears off, it starts sounding like crap... thats when it depends on the muffler... but HKS is quality so i doubt their mufflers are made with glass packs..
Last edited by CivicHX01; 07-29-2003 at 01:46 AM.
07-29-2003
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Rep Power: 0 yup... go for it
but also keep in mind that theres also a difference in power in the way the piping is bent... crush bent is more common but is a little more restirictive (try bending a straw then try to sip out of it, you'll know what i mean)
but mandrel bent keeps the same diameter the whole way through which is more efficient (like those straws that were made to be bent near the top), but mandrel bent is, of course, much more expensive...
so make sure you also decide if you want the piping mandrel or crush... there is a difference, but its minimal (maybe like 1/8-1 hp difference thats a pure guess)
but also keep in mind that theres also a difference in power in the way the piping is bent... crush bent is more common but is a little more restirictive (try bending a straw then try to sip out of it, you'll know what i mean)
but mandrel bent keeps the same diameter the whole way through which is more efficient (like those straws that were made to be bent near the top), but mandrel bent is, of course, much more expensive...
so make sure you also decide if you want the piping mandrel or crush... there is a difference, but its minimal (maybe like 1/8-1 hp difference thats a pure guess)
Last edited by CivicHX01; 07-29-2003 at 02:00 AM.
07-29-2003
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Rep Power: 0 i guess it would depend on the muffler shop... i wouldn't know exactly but contact your local muffler shop and ask the cost of crush vs. mandrel, they should know what you are talking about... also i don't recommend going to the mainstream places like midas...
07-29-2003
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Rep Power: 0 ya im not so i shoud get 2 1/4 piping with a resignator with 2 1/4 and also i shoud get madrel?...damn i thought it was a lot easier then that when i wanted to upgrade my piping.
07-29-2003
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Rep Power: 324 actually it depends on the muffler on the sound after the resonator is removed. for example, ill be removing mine but thats because i have a magnaflow exhaust. if you get some apc muffler then for the love of god dont remove the resonator.
07-29-2003
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Rep Power: 0 sorry if all this info is bombarding you... but you also have the choice of having the piping bolted on with a flange or welded on... if you ever want to go back to stock you would need the piping bolted onto the cat and onto your HKS rear section (later you just unbolt the piping and HKS and bolt the stock system back on or bolt on a differend catback system)...
you can get it welded if you don't mind having the piping permanently welded onto your cat and your HKS (if you wanted to change your exhaust system later it would have to be sawed off)
as far as the price goes... i've been quoted $20 extra per flange more than welding (so that would be 1 flange to connect to the cat and one flange to connect to the rear section so $40 extra over just having it welded on) but again it would depend on the shop...
so all the factors in getting piping include
1. size (diameter)
2. resonator or no resonator
3. mandrel or crush bent
4. welded or bolted on
oh and piping material is also a factor
5. regular vs. stainless steel (shiny and good for shows but of course more expensive)
so theoretically the most expensive set of piping would be with a resonator, mandrel bent, flanges on each side for easy bolting on and off, and stainless steel
most catback systems sold are made the way i just said above (hence the $400-$600 price tag)
you can get it welded if you don't mind having the piping permanently welded onto your cat and your HKS (if you wanted to change your exhaust system later it would have to be sawed off)
as far as the price goes... i've been quoted $20 extra per flange more than welding (so that would be 1 flange to connect to the cat and one flange to connect to the rear section so $40 extra over just having it welded on) but again it would depend on the shop...
so all the factors in getting piping include
1. size (diameter)
2. resonator or no resonator
3. mandrel or crush bent
4. welded or bolted on
oh and piping material is also a factor
5. regular vs. stainless steel (shiny and good for shows but of course more expensive)
so theoretically the most expensive set of piping would be with a resonator, mandrel bent, flanges on each side for easy bolting on and off, and stainless steel
most catback systems sold are made the way i just said above (hence the $400-$600 price tag)
Last edited by CivicHX01; 07-29-2003 at 03:54 AM.
07-30-2003
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Rep Power: 285 i say leave it stock. in my opinion our cars barely has torque and we cant afford to lose anymore by adding bigger piping or the intake. we need the backpressure. i know it will give more horsepower, but whats horsepower without torque? just my 2 cents...
07-31-2003
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Rep Power: 0 i cant hear my exhaust, so i think that getting bigger piping will increase my horsepower and make my exhaust louder. Its kinda embarrassing, having an hks exhaust and not being able to hear it.
08-02-2003
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Rep Power: 0 will from what i hear the difference between the two isnt much, and it isnt worth the price. So basically i just got SRI. But its really loud and sometimes thats all i hear when i drive, I barely hear my exhaust, thats one reason im getting bigger piping.
08-02-2003
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Rep Power: 0 i have an ebay cai, with a magnaflow muffler, and 2 1/4th inch pipe from the cat to the muffler, no resignator. sounds good, deep sound, not loud and horribly anoying. i payed totally about 60 bucks for everything and 100 for muffler, but i know the guy that owns the muffler shop.
