Test pipes are cheap enough ;) I'd like to have the stock cats intact in case I ever need them.

I did this when I was a young buck. JB Welded stripped cats around off-road pipes and then painted the "welds" silver. Passed visual inspection. :roflpuke2:

Gutted cats are free and look like you've still got cats. ;)

so by what it says ball bearing turbos Spool faster and gets you More Optimized performance then.....so really there isnt a difference just the mere fact one is more improved than other? and do journal turbos cause lag or maybe i misunderstood that on the description i read??

I want the SC 1.5, however, $1700 almost buys a clutch, radiator, and an oil cooler. I will be closing the deal tomorrow when they open.

Or just have a badge in your wallet like me :happydance:

resonated test pipes look enough like cats

I've heard even the resonated test pipes won't hold up with boosted Zs. It's all good though. I found a workaround and will be going with test pipes :tup:

Where is your info on resonated TP not golfing up boost applications

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It was being discussed here.

Anyone with experience with the Motordyne ART pipes and turbos? They're not a typical resonated test pipe...

That's nice and all but that's one persons opinion where do the pros sit in on this? Sam? Mike?

I've talked to a few shops and have a few boosted friends who run resonated TP's and have never heard of this issue before.

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I have ART pipes and I was told by my tuner they will work just fine with the addition of a TT...and they install a lot of turbos.

Tony from FI says he's concerned about them holding up also: link

I'd still be interested to hear GTM's opinion on it though.

Yea man. HFC and TP near the turbos, will fry up sooner than later.

Really? I'm gonna have to do some research but sound like I'm going to have to remove mine. What happens when they go out or what do you look for?

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Yep, elperuano is correct, and once they start going, you're a BIT screwed, because the honeycomb is not gonna rattle and sit in your muffler. If you let it continue to burn up, you're going to ruin your muffler completely

I asked Tony @ Z days about the Resonated TP and FI he told me not to do it he said (in my situation)either TP or stock cats.

I don't even think Tony recommends R TP's...

He sells them.

Lol, I know he does, but I could've sworn that e said the heat from a forced induction kit would blow them out as well (maybe I've been drinking too much today though)

He did.:hello:

I feel sorry for all you guys with emissions.

Why I got plentyyyyyyyy of power.:tiphat:

Two things will happen:
-The interior will come apart and rattle letting you know to replace it ASAP

AND
-If you do not replace it, it can clog the pipe and actually push air backwards into the block destroying your engine.

This is why you do not run HFC/RTP with boost as the heat destroys them, you open up yourself to major issues. Can you run them? Sure, they will work but be prepared for them to fail and need to replace them at some point.

So what do you run with boost? Stock cats?

Here's what I don't get: how is it that all of these factory turbocharged performance cars have cats that do not burn up? Is the issue that the aftermarket just does not have access to the higher quality / more resilient cats, or is it a price prohibition, or what?

Stock cats, Test pipes, 3" down pipes
Basically you want straight pipes which have no material that can break off from heat or pressure. Even stock cats will get torn up, I have broken some already with mine.

Hell no. Test pipes. Stock cats would likely fry faster than aftermarket. Even if they survived, that's a ton of backpressure to introduce into a system that relies on exhaust flow.

Stock cats hold up better under boost than aftermarket cats.

You learn something new every day. I still don't know why you would go through the effort of turboing the car and leave the stock cats unless you're in a state that requires it.

I have stock cats on mine but I'm SC ,and need emissions but I wouldn't put any cats on a turbo car they will get burned up faster than mine.

I was curious about this too. I ran HFCs on my old STi and never heard anyone having a failure or even being concerned about it. Either way, I'm going with test pipes but I'd still like to know why it's an issue on this platform.

The cats on the STI are a lot further down stream from the turbo than on the Z. Heat is the issue, and the additional distance makes a huge difference.

That was the only thing I could think of. I believe the FI 3" exhaust which is made for turbo applications even has HFCs in it but they're much farther down stream. I guess if someone is determined/required to run cats, that would be a good option. I may go that route later down the road if my inspections don't go as planned.

I've got the catted FI 3". The cats are several feet away from the turbos. They should hold up fine.

Am I the only one going open dump?

I've done it on previous cars. It's kind of cool on a toy car. There's just no way in hell I'd run open dumps on a daily driver.

Just stay out of boost. Wait, what did I just say?

Good luck with that. I've got the small GT28s, and it spools very quickly. I'd imagine the 16gs and 18gs are even quicker.