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-   -   Cats Exploded. Suggestions? (http://www.the370z.com/forced-induction/119835-cats-exploded-suggestions.html)

MoulaZ 03-04-2017 03:36 AM

BAD IDEA. TEST PIPES + MOTORDYNE WERE A BAD IDEA!!! CHRIST THE NOISE! It's loud before you even lay into it. When you plant your foot down, you could wake the dead. First cop to hear me and I'm done. I'm not convinced my pair of 100cpsi Cats are gonna do sh*t to combat this. =/

Guyfromthere 03-04-2017 03:47 AM

Quote:

Originally Posted by MoulaZ (Post 3623150)
BAD IDEA. TEST PIPES + MOTORDYNE WERE A BAD IDEA!!! CHRIST THE NOISE! It's loud before you even lay into it. When you plant your foot down, you could wake the dead. First cop to hear me and I'm done. I'm not convinced my pair of 100cpsi Cats are gonna do sh*t to combat this. =/

Video! :pics:

Did you consider getting ART pipes? They are quieter.

MoulaZ 03-04-2017 05:27 AM

Quote:

Originally Posted by Guyfromthere (Post 3623151)
Video! :pics:

Did you consider getting ART pipes? They are quieter.

Video will be coming.

And doesn't matter how large a resonance chamber you hang off a Test Pipe, it's still gonna be LOUD. Not to mention 4 times the price lol. :icon17:

Guyfromthere 03-04-2017 07:37 AM

Quote:

Originally Posted by MoulaZ (Post 3623165)
Video will be coming.

And doesn't matter how large a resonance chamber you hang off a Test Pipe, it's still gonna be LOUD. Not to mention 4 times the price lol. :icon17:

You can go stock exhaust and be mistaken for a hybrid car 24/7 like I was all last year :eekdance:

ChaseZ 03-04-2017 10:16 AM

Quote:

Originally Posted by MoulaZ (Post 3623165)
Video will be coming.

And doesn't matter how large a resonance chamber you hang off a Test Pipe, it's still gonna be LOUD. Not to mention 4 times the price lol. :icon17:

It makes a massive difference.

ART pipes are light years beyond any other. And depending on the air moving through can actually be very quiet too. This from personal experience.

Quote:

Originally Posted by Guyfromthere (Post 3623189)
You can go stock exhaust and be mistaken for a hybrid car 24/7 like I was all last year :eekdance:

My god I couldn't stand the stock exhaust. Barely had it off the dealer lot and had the motordyne setup ordered!

MoulaZ 03-04-2017 04:29 PM

Quote:

Originally Posted by ChaseZ (Post 3623242)
It makes a massive difference.

ART pipes are light years beyond any other. And depending on the air moving through can actually be very quiet too. This from personal experience.



My god I couldn't stand the stock exhaust. Barely had it off the dealer lot and had the motordyne setup ordered!

Sorry, I've heard various clips of ART Pipes and I disagree. The only major difference was the level of rasp. Noise level still went up.

ChaseZ 03-04-2017 04:53 PM

Quote:

Originally Posted by MoulaZ (Post 3623312)
Sorry, I've heard various clips of ART Pipes and I disagree. The only major difference was the level of rasp. Noise level still went up.

That's why I qualified it by saying it depends in the air going through. When I was NA I had Art+Motordyne with both Injen and Stillen CAI's. With the Injen it was loud and raunchy and could hear it blocks away whether you were WOT or not. With the G3 it was as quiet as Motordyne + factory cats, which is not loud whatsoever.

Internet doesn't trump real life experience.

shadow85 04-28-2017 11:50 PM

So MoulaZ are you keeping the TPs or are going to get CATs on soon?

MoulaZ 04-29-2017 02:48 AM

Quote:

Originally Posted by shadow85 (Post 3647038)
So MoulaZ are you keeping the TPs or are going to get CATs on soon?

Keeping TPs, waiting to find a buyer for my current Motordyne then going Invidia.

MoulaZ 04-29-2017 10:36 PM

2 Attachment(s)
By the way, for those curious for what the Cats actually looked like after exploding, here's a before & after.

When it happened, got the CEL flashing at me every time I tried to rev and it struggled... but strangely it didn't generate a code.

Jayhovah 04-29-2017 10:41 PM

Quote:

Originally Posted by MoulaZ (Post 3647330)
By the way, for those curious for what the Cats actually looked like after exploding, here's a before & after.

When it happened, got the CEL flashing at me every time I tried to rev and it struggled... but strangely it didn't generate a code.

https://i.imgflip.com/xhss9.jpg

Jinxx 04-29-2017 10:50 PM

Lol just knock out all the broken pieces in both .... there you go straight pipes for free lol

ChaseZ 04-30-2017 12:52 AM

How long before they went boom?

unijabnx 04-30-2017 03:01 AM

Quote:

Originally Posted by Jinxx (Post 3647334)
Lol just knock out all the broken pieces in both .... there you go straight pipes for free lol

about to say the same thing :tiphat:

MoulaZ 04-30-2017 03:56 AM

1 Attachment(s)
Quote:

Originally Posted by ChaseZ (Post 3647353)
How long before they went boom?

Well here's the very important thing. Prior to this happening I was struggling to diagnose weird AFRs on Bank 2, the same Bank that ended up dedonating that Cat.

Only Bank 2 went. Bank 1 is the 'before' photo.

Turns out my Plenum gasket had developed a very small tear, for the Cylinder 6 runner and was the cause of my whacky AFRs.

What I suspect happened was one day while conducting some 'tests' and revving it out, right after I hit redline (and rev limiter) I heard a small pop followed by brown smoke bellowing out my exhaust, which I think I mentioned already in OP. Had I not had the AFR issues on that Bank 2, probably wouldn't have happened I think. Could have been a little bit too much fuel was dumped, and ignited in the Headers and blew out the Cat? I dunno, but it seems kinda plausible.

Photo of the tear I'm talking about:


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