were to put cut out?

[greencamaro]

Were should i put my cut out should i put it right after the cat ? or further back?

[redbird00]

put it in place of the cat...

merlin

[Messi4h]

IMO the best place for the cutout is right before the rear axle. In place of the cat would just sound HORRIBLE

[Ted]

before the rear axle. unless you want your car to sound like a nascar wannabe.

[ravenp]

The whole point of a cut out is to run open headers at the track... so the only place to put it is before the cat!

To put it anywhere else makes little sense. The cat is a restriction in the exhaust system... why put it after a restriction but before another?

Yes it'll likely sound crappy, but who cares? YOu're at the track, you want numbers...

Will it help a stock engine n/a at the track? Not many do it, but the ones i've seen say it's helped... i'd say do it and it'll always be there for when you beef up your engine even if you've killed too much backpressure for the n/a setup... my 2cents.

[ReodDai]

Well the main reason you put it after the cat and not before is because without a little backpressure on near stock engines you won't gain anything from open headers so why run them? Keeping it after the cat creates enough backpressure to maintain decent low end torque.

[ravenp]

<blockquote>quote:</font><hr>Originally posted by ReodDai:
Well the main reason you put it after the cat and not before is because without a little backpressure on near stock engines you won't gain anything from open headers so why run them? Keeping it after the cat creates enough backpressure to maintain decent low end torque.<hr></blockquote>
Okay, so it becomes a question of what are the rest of your plans with the car. If you want to go stock for the long haul, then put it after I suppose... if you plan to cam/n2o/turbo/sc etc... put it before and do it right the first time [img]smile.gif[/img]

[WickEdSix9838]

mines before the muffler and it definately helps but im considering doing one more towards the front this weekend just to try...

[Ted]

Ok, well unless you decide to put it in place of the cat (which i wouldn't recommend to anyone), if you put it before the cat, you have to hack up your Y pipe collector. Theres not too many other places you can put it, unless you put it right before the rear axle. Most people get cutouts for the sound, and it will sound better there, and not rattle your whole interior too much. My friend dropped .2 seconds off his ET consistently with it opened. If you see better results before the cat then i'd like to know them.

[KBeezy]

Since mine is OBDI I am removing my cat converter completely and getting an electric cutout installed where my cat converter was -- but it wont hurt me because I am going to keep my 3" y-pipe back exhaust when I get my motor swap done [img]smile.gif[/img]

[Bliggida]

Not to be the so called "Car God" again. But Reoi you really shouldn't talk about things you don't know or fully understand. i.e. backpressure.

Do you know how much backpressure a 3.8L V6 needs in stock, or modified tune levels? Do you know how to measure backpressure?

Not to be rude, but it sounds to me like you are merely regurgitating some basic assumed philosophies about backpressure, that if you were to take a deeper look into would realize they are false presumptions.

Well, not to go into too much detail, but for a 3.8L V6. If you removed the cat. and the muffler. Only ran straight pipe and exhaust manifolds from the motor. The engine would have all the backpressure it needed.

There are two purposes of having a cut-out. Sound and performance.
Placing a cutout behind the cat. restricts both of these.

As far as sound goes, nothing sounds more awesome than open headers. But a great many people confuse too loud with sounding bad. Open Headers are indeed too loud (and I love it), but what they don't do is sound 'bad'. If its too loud for you, say so. No one is going to call you a "sissy" and actually mean it. Open headers creates a volume that can damage your hearing. You're smart to say its too loud. But don't misinterpret a bearable volume with "oh they sound horrible" The two are not synonamous. You need to learn to distinguish between the two before arriving at an opinion.

[KBeezy]

werd. Sure, you might lose a COUPLE low end HP and low end Torque, BUT the gains you make up top are DEFINATELY worth it.

My buddy has a 14.4 second Integra GS-R. When he bought his header he had to run open header for a while until his "test pipe" came in. His car was a DOG off the line (more than usual), but the gains up top were unimaginable! He ran an S2000, and beat him by a car and a half running open header. So all that story is saying is, yes -- you will lose a couple down low, BUT the gains up top far exceed the tiny losses down low.

[Timbo1969]

Before the cat. Just connect it to the collector then relocate the cat and run an O2 sim on the sensor.

[Bliggida]

<blockquote>quote:</font><hr>Originally posted by KBeezy:
werd. Sure, you might lose a COUPLE low end HP and low end Torque, BUT the gains you make up top are DEFINATELY worth it.

My buddy has a 14.4 second Integra GS-R. When he bought his header he had to run open header for a while until his "test pipe" came in. His car was a DOG off the line (more than usual), but the gains up top were unimaginable! He ran an S2000, and beat him by a car and a half running open header. So all that story is saying is, yes -- you will lose a couple down low, BUT the gains up top far exceed the tiny losses down low.<hr></blockquote>

Another misconception of backpressure. You do not lose low end torque...you only gain more top end horsepower.

[Messi4h]

<blockquote>quote:</font><hr>Originally posted by Bliggida:


Another misconception of backpressure. You do not lose low end torque...you only gain more top end horsepower.<hr></blockquote>

actually you DO lose low end torque, you should take your own advice. Its a very slight loss, but there is some low end torque loss from running a cutout