hey iv been thinking after i installed my exhaust and my headers on my accord i was thinking about taking out the CAT and just running straight pipe from the headers back. im thinking that it would work pretty well. by doing this would i run into any problems or would doing this cause other problems
(besides legal trouble dont really care about those problems lol) Thanks

 

What year and engine?? More info needed... Taking out the cat on a stock accord is pointless for power gains (if thats what your after) not to mention not being able to pass emissions and triggering a CEL. BTW, if its a 4 cyl, it just has one header; not plural...

 

It's a 2001 accord f23a1 4cyl
I have k&n short ram Meagan racing header and a cat back exhaust

 

OBDII cars('96-up) look for the operational efficiency of the catalyst. This will immediately set a code if the second O2 finds the emissions output are out of spec. Also without a catalyst the exhaust will stink. It will not provide you with any power gains, and you will create more pollution. NOx is nasty ****, acid rain, visible smog, just be responsible and leave it on.

 

^^ what he said

 

Yeah, and you'll have trouble selling it if you ever try, because it won't be able to pass state inspections (if your state has those awful things). I'd definitely leave it on.

 

I disagree.

Those 900 cell ceramic CAT's are VERY restrictive. When you take it off and replace it with a cat-delete, You will lose TQ down low, but some HP in the upper RPM range will be freed up.

CEL - pfff, thats what the defouler trick is for.

Yeah, it will stink, but only for the people behind you.

You wont have trouble selling it, if you keep the CAT. Very easily put back on.


It wil be raspy as all hell(Ricer status). I recommend adding a Magnaflow resonator. The longer the better as it will take away the rasp and add some deep tone.

 

What other mods do you have done to your F23 other than header & exhaust?

If nothing, you won't gain enough Hp to cover your time to cut it out, never mind if you have to pay someone to do it. Then it's for sure not worth it.

Just wondering why you say that he would end up loosing torque by removing the Cat? Please don't say it's due to lack of back pressure!

 

He's not going to be revving it to over Nine Thousand rpm. It will add no notable power, and will not cause any loss of torque.

I always see someone mentioning how restrictive a catalyst is. Prove it with a dyno on an all stock car, with just the catalyst removed, no CAI/exhaust/header. Just a plain Jane car. Dyno with and without the catalyst. I'm going to go with negligible power increase.
Defouler? With Lambdas? I think you are confusing what a defouler is used for.
Are there asshats actually using spark plug defoulers to keep the secondary O2 out of the exhaust stream in a way to 'fool' the secondary O2s? You must be joking, this sounds like something conjured up by the Ricer crowd. Internet gold.
http://www.epa.gov/compliance/resour...per-fcsht.html Well I guess they have to come up with something after the old standby was handed its *** by the EPA.
That's right, because you will never be;
in a parking garage,
stuck in traffic,
at a stop sign,
or a pesky red light.

Because that's how you drive...

flat out.

 

Thanks for the advice peoples and I deffinetly dont want to sound like a Ricer
Cause I damn for sure hate that. And I will look in more about that resinator. So basically taken it off would just be a mess in way or another. Thanks again for the help

 

whoa...you get an amazing 4 hp (give or take one or 2) without a cat vs a stock cat you know that right...one of the magazines did a couple dyno runs to show...the diffrence with a high flow cat vs no cat was a 2hp diffrence

and keep in mind these test were done WITH actual mods and not just bolt-ons

DD driving with no cat would not only suck for the environment but would also suck with the lack of tq