Sorry for the duplicate thread, my computer/forum froze and everything I wrote disappeared and now I can't even reply in the other thread .

Anybody have any experience with metallic substrate cats? I came across this website (http://www.smb.net.au/fullsystemsmazdarx7.htm) that makes some impressive flow claims for their metallic cats. However, they make no mention of the cats ability to reduce emissions. Does anybody know about "metallic" cats ability to reduce emissions? Thanks.

Matt

 

http://www.rpmoutlet.com/powercat.htm

 

Thanks for the link, Mahjik . Again, though, no reference on emissions control. I know these things probably are not going to pass the "sniffer" (especially with no air pump pipe), but I'm curious if they reduce emissions the same (or maybe better) than a typical high flow cat (ceramic or otherwise).

 

Matt,

I have the knightsport metallit cat. I was going to emission test it but ended up putting the car up back on jack stands to do some more work. When I get it back down I will emission test it again with the same config as I did with the stock cat just now with the mettalit one.

FWIW, the car passed the "drive behind it without your eyes watering test"

With the metallit cat I could stand behind the car and barely smell fumes...it was like the stock cat. Also when driving behind the car, there was no noticable "no-cat stench". Hope that helps

 

Sweet!

Anyone from down under know anything about SMB? They look like a pretty damn solid company.

 

yeah, I was pretty impressed with their site .

 

I recently installed the Knightsports cat and passed CA emissions. I had previously failed the test with my stock main cat in place. Must have gone bad.

I also noticed a boost increase of 1-2 psi.

-Brett

 

Just doing some quick research, I found a set of metallic converters for Ferraris that look just like the Powercat or SMB converters. They are EPA and CARB approved. Of course, they cost $3000 for the pair you need for a 360 Modena. And we think FD parts are bad.

 

Hey good to hear! Do you have the airpump hooked up or not? Any other mods?

 

Yes, I have the airpump hooked up. Power mods are the standard stage III items.

-Brett

 

whaaaaaaaaat? More specific please!

 

Power mods:
M2 Intake, M2 (ASP) intercooler, downpipe, Racing beat cat-back, ECU (was M2 at time of smog test).

 

Brett, so the Knightsport metallic converter has an airpump tube? I thought one of the advantages of the metallic technology was that you wouldn't need air supplied to the cat?

 

If anyone is interested in the SMB products, I will be getting the catback in the next few weeks.

I also received a few photos recently showing the quality of the welds etc. They look incredibly well made.

I am getting a 3.5" cat back (With an adapter to fit to the standard system for now) which will eventually mate up to a 4" metal substrate cat and resonator. Seemingly with their full 3.5" system (Dump pipe in 3.5", 4" cat, and 3.5" cat back) they come in just below Australias 90db noise limit. NB The 3.5" system is not shown on their web site due to needing other mods to support it (Obviously)
I have not decided if i will get their dump pipe due to probability of upgrading turbos shortly....

If anyone wants the photos I will see if i can post them up...obviously when i get the system i will video it, and get happy snaps of it before installation for you all...(Prob at least a month away until i get that far though!)

edit: Forgot to mention ..the cat back i will be getting will have twin outlets, seemingly they can do this mod very easily as they custom build each system individually
Sandy

 

Rynberg,

when the buying of the knighsport cat was going on it was discussed about hooking the airpump up to it or not...no one came to a consensus.

Since it had it, I left it on and attached the airpump pipe. I'll let someone else be a guinea pig on this one. The cat was too expensive to clog, burn-up, or whatever by not hooking up the pipe with all of my connections already sitting there. About the emissions...maybe someone could test it without.

 

Thanks for the info!

That's what I was thinking as well.

Yes... please post pics of this . They seem to make all around quality products, it would be nice to see some other photos of their work.

 

I ordered one from Random Technology last week. Here is the link to the specs http://www.randomtechnology.com/index.html. It flows 100cfm *more* than the one from rpm outlet.

I should have it installed in the next week or two. I'll let you know how it goes.
Might even try to get it smogged in NY.

 

What about noise? Is it any louder/quieter than the stock cat?

 

I bet it's louder...it's so small

 

I'm not done with the break in but on highway cruising with the KS Mettalit cat and RB duals there is a nice throaty drone its kinda cool.

 

Plan on running it with the airpump?

 

Haha, deja vu? I shoulda posted instead of PM'ed, it woulda saved you some time

 

Keep in mind that the chart on RPM Outlet's site is showing 2.5" cat numbers, not 3".

 

hadn't noticed that. oh well. the random cat is few inches shorter anyway due to the extra piping rpm's has welded on.

 

you don't run an airpump with a metal substrate cat.

From random's site:
http://www.randomtechnology.com/technical.html
" Most converters produced in recent years contain two monolith "bricks" spaced several inches apart from each other. The washcoat on the forward brick typically contains rhodium which causes nitrogen oxides to break down into nitrogen and oxygen. After passing through the first brick, exhaust gasses pass through an air chamber before entering the second brick. In some converters, known as “oxidation” types, a small tube passes through the chamber and injects air pumped in by an engine-driven “smog pump”. (In some vehicles, the "smog pump" incorporates an electric motor, which reduces accessory drive complexity and also allows for remote mounting.) Injected air simply brings additional oxygen into the exhaust stream to assist in the oxidation process."

The metal substrate cats are different in construction. They don't have the 2 "bricks" that ceramic cats do and the material doesn't need the extra oxygen/air.