Getting my car str8 piped(no cat)
Thread Starter
Member
Joined: May 2009
Posts: 282
From: South Dakota
Getting my car str8 piped(no cat)
I decided to get my cat converter cut out and str8 pipe it for now. The car still has the stock y-pipe and resonator and a no name muffler i got from my uncle.How do u guys think it will sound with out the cat? I imagine it wont be too loud since it still has the resonator on it. Also how much power will I gain from that? i know it wont be much but it'll be nice to have some extra power.
If your going to straight pipe it then at least take the resonator off as well but if you like the sound of the muffler you have then you can leave it as most aftermarkets are straight through anyways. It will probably sound like crap with the resonator still on I imagine. In for a vid though. Hollar if you don't know how, I want to hear the set up with stock components
It very well could lose hp, good question. I do not know. I do know that every exhaust is designed a certain way to aid certain torque characteristics so eliminating those designs could have harmful affects. hmmmm
Senior Member
Joined: Oct 2009
Posts: 1,410
From: Frederick, MD
What to expect:
"It's straight pipe from the catalytic converter back up to where the mufflers suppose to go but as you can see there's no muffler. I extended the pipe all the way now so it's now 3' then I put the end 2 1/2' then blew the tip up too 3' again."
You're going to lose HP with it simply straight piped, the N/A motor needs back pressure and what you're doing is depleting it of it
This was my car with an open y-pipe:
Good times
"It's straight pipe from the catalytic converter back up to where the mufflers suppose to go but as you can see there's no muffler. I extended the pipe all the way now so it's now 3' then I put the end 2 1/2' then blew the tip up too 3' again."
You're going to lose HP with it simply straight piped, the N/A motor needs back pressure and what you're doing is depleting it of it
This was my car with an open y-pipe:
Good times
Thread Starter
Member
Joined: May 2009
Posts: 282
From: South Dakota
I always thought that cats decreases horsepower not the other way around. For example when the Jaguar xj220 came out they tested it with and without the cats. when they took them out the car gained 60 horsepower and the car's top speed increased. I guess its not the same with all cars.
My car actually sounded like the first video a few months ago after my rusty resonator blew out and I got a new resonator from maximajoe in North Dakota
Like I said im just cuttin off the cat...not the resonator or muffler and it still has the stock y pipe.
My car actually sounded like the first video a few months ago after my rusty resonator blew out and I got a new resonator from maximajoe in North Dakota
Like I said im just cuttin off the cat...not the resonator or muffler and it still has the stock y pipe.
Last edited by ivorton23; Mar 16, 2012 at 09:09 PM.
Senior Member
Joined: Oct 2009
Posts: 1,410
From: Frederick, MD
I always thought that cats decreases horsepower not the other way around. For example when the Jaguar xj220 came out they tested it with and without the cats. when they took them out the car gained 60 horsepower and the car's top speed increased. I guess its not the same with all cars.
My car actually sounded like the first video a few months ago after my rusty resonator blew out and I got a new resonator from maximajoe in North Dakota
Like I said im just cuttin off the cat...not the resonator or muffler and it still has the stock y pipe.
My car actually sounded like the first video a few months ago after my rusty resonator blew out and I got a new resonator from maximajoe in North Dakota
Like I said im just cuttin off the cat...not the resonator or muffler and it still has the stock y pipe.
Senior Member
Joined: Jul 2011
Posts: 1,095
From: Salt Lake City, UT
I currently have long tube equal length headers and ypipe, Stock cat, No Res, and OBX-R muffler. It's pretty damn loud and I still have the cat. I planned on getting a resonated test pipe to try and clear up some of the rasp. It does have a very very nice sound above 4k rpm though. and I do get some backfire on down shifts, which I rather enjoy. 
Senior Member
Joined: Jul 2011
Posts: 1,095
From: Salt Lake City, UT
Thread Starter
Member
Joined: May 2009
Posts: 282
From: South Dakota
http://www.youtube.com/watch?v=p9pHVJXv068
the max in this vid sounds pretty good. wish mine sounded like that.
the max in this vid sounds pretty good. wish mine sounded like that.
http://www.youtube.com/watch?v=p9pHVJXv068
the max in this vid sounds pretty good. wish mine sounded like that.
the max in this vid sounds pretty good. wish mine sounded like that.
I have stock headers, WS ypipe and magnaflow hi flo cat and muffler n stock res. It sounds great on start up and idle but almost too ricey when you get on it....my 2 cents.
The vr4 on the other hand has 3" straight pipe from turbo back....loud as hell and sounds great....
The vr4 on the other hand has 3" straight pipe from turbo back....loud as hell and sounds great....
95% of your back pressure is created by your stock headers and y pipe. and a n/a motor doesnt need hardly any back pressure, it needs good exhaust scavenging which can be made with little backpressure
from what i gathered over time is that N/A's need some back pressure, but when your boosted (turbo or supercharged) less back pressure is better
backpressure is nothing but bad on ANY internal combustion engine. anyone that ever says "you need backpressure or you'll lose horsepower" does not know what they are talking about. how many times does that backpressure article from the engineers at garrett honeywell need to be posted?
for the OP, you will gain "something" but almost certainly not enough to be noticed, and with the stock resonator in place and stock ypipe you won't notice much of a sound change either.
for the OP, you will gain "something" but almost certainly not enough to be noticed, and with the stock resonator in place and stock ypipe you won't notice much of a sound change either.
backpressure is nothing but bad on ANY internal combustion engine. anyone that ever says "you need backpressure or you'll lose horsepower" does not know what they are talking about. how many times does that backpressure article from the engineers at garrett honeywell need to be posted?
for the OP, you will gain "something" but almost certainly not enough to be noticed, and with the stock resonator in place and stock ypipe you won't notice much of a sound change either.
for the OP, you will gain "something" but almost certainly not enough to be noticed, and with the stock resonator in place and stock ypipe you won't notice much of a sound change either.
Senior Member
Joined: Jul 2011
Posts: 1,095
From: Salt Lake City, UT
Senior Member
Joined: Aug 2010
Posts: 346
From: irving
LOL!!^
this is still the best sounding 4th gen to me
http://www.youtube.com/watch?v=RSG9d...eature=related
this is still the best sounding 4th gen to me
http://www.youtube.com/watch?v=RSG9d...eature=related
Junior Member
Joined: Feb 2011
Posts: 81
ive got 2.5 from the Y back. just pipe.
sounds super mean. i <3 it.
plus loud exhaust means you drive harder to hear it, so lose mpgs and will feel faster..
i hate to see the muffler can just chilling out back.. it drives me crazy.
sounds super mean. i <3 it.
plus loud exhaust means you drive harder to hear it, so lose mpgs and will feel faster..
i hate to see the muffler can just chilling out back.. it drives me crazy.
I have a 99 with stock headers and ypipe and I deleted the resognator. I bought that "N1" style from ebay. It does not sound loud at all. It is not too ricey either. If it was, I would have taken it off in a heart beat. Heres what mine sounded like before my 3.5 swap....http://www.youtube.com/watch?v=lj9r6...eature=related
After the 3.5 swap it was similar in sound but it was just much much deeper growl, still not loud but just deeper... Il try and see if I can post a video. I LIKE IT!
After the 3.5 swap it was similar in sound but it was just much much deeper growl, still not loud but just deeper... Il try and see if I can post a video. I LIKE IT!
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