Originally Posted by
MSq5
Forgive me, but as far as I'm concerned, you can take your personal attacks on vendors elsewhere. What I want to discuss here is what works, what does not. Failed cats in OEM location is old news. Maybe just let it go?
Neither you, nor I, nor anyone else should be certain enough to "recommend my setup." With respect, it comes across smug and condescending. I post my experience, which may or may not work for others, but never "recommend". Almost all of us run different combinations of components, especially exhaust, and small changes can make a big difference in sound. Different cats, especially different cell counts, different substrates and different substrate diameters, even when placed downstream, will have different effects on both flow and exhaust system resonance and thus may affect both drone and rasp, as well as how they hold up over time.
About the only thing we can be sure of is that cats in the stock location will fail on tuned cars sooner or later, regardless of manufacturer. We can agree that catless or catted downpipes is just about the only solution, but beyond that there are just too many variables to "recommend a setup."
Maybe its my ears, but I seem to still hear rasp on your first video clip - blipping the throttle before activating the two stage tune effect. Its just going to be hard to eliminate it all. Do you know the flow rate on those 100 cell metal cats? The small diameter of the substrate might be restrictive. They are only 4.5" in diameter. Larger surface area might flow better. Just wondering what power level they support before becoming restrictive.
Do you have a cruising clip for 50-60 mph? Is there any cabin drone?
My point in itemizing the specific vendors in my post was to give some clarity on what has already been discussed about vendors in previous posts. People need to take individual responsibility to vet the claims of vendors which requires getting educated. If the issue with melting cats is the location, stupid high temperatures, cat material, cell count, etc, then no one can reasonably expect for one vendor to magically get it right where everyone else has failed.
If you look at my original exhaust post, it is purely informational. That being said, a success story in the midst of a bunch of failed attempts to run cats should be a data point people should look at and find out what differences were made in order to overcome the typical cat failures everyone else is experiencing. So yes, in that sense its a recommendation even though I never actually
recommended it in my exhaust thread. Yes, in
this thread I said "dont waste your money" since it looked like he was going down the road that every other oem-locationed failed cat attempt has gone and then provided an alternate solution.
I want to at some point re-install a new magnaflow in the place of the baby resonators (the muffler that had all its packing blown out) because I think thats the cause of the sound you're hearing. Now that the cats are in, I think replacing it will allow it to stay working properly without blowing/melting its guts out.
As far as drone, there is none whatsoever at any RPM range.
As far as the cars go, Im not sure how dense they actually are, but they are for sure WAY less dense than my OEM cats. Remember, 400 cell is more dense than 300, which is more dense than 200, etc. The summitracing website says "They are more durable and more shock-resistant than ceramic substrates, and they can support higher exhaust gas flow speed and higher temperatures." and that's been my experience. No noticeable loss in power as well, as Im faster than I've ever been when up against people I've raced over the years.
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