ian kam

has anyone used or researchedthis product. I know using will affect some Hp but to stop the heavy staining on my garage floor from exhaust would sure be nice!!

wolfenstein

random technologies these are the best cats and they actually work some of the others not so good. metal cats are junk i've tried a few others flow is not so well. bottom line if you need one it should work, why is your floor staining? that's not a cat prob. contrary to popular belief a properly sized cat will not cut down on power

Rogue_Ant

Proof?

Any backpressure post turbine is detrimental, period.



Rogue

wolfenstein

that's why i said properly sized-a cat is not a restriction if properly sized i have seen most perf. mufflers flow at 475 cfm or so i saw a 3" performance cat flow at 502 where's the restriction

Rogue_Ant

Take some backpressure readings, I bet you will be suprised. Its similar to taking a whole bunch of stir-straws and blowing through them, sure you can breath but not that easily.


Rogue

Tom M'Guinn

I can't speak to the flow numbers and the science, but swapping a test pipe in a 951 will add noticeable HP, at least in my experience.

jgporsche

Check with SFR on high flow cats. I bought one from LR and it didn't look "high-flow". But the cat i put on my 944S, you could basically see through.

ian kam

here is the product I was looking at http://www.metalcat.com.au/

wolfenstein

i have taken a back pressure reading i have an sfr 3" with a random tech 3" cat no diff with or without cat, now the crossover pipe is a diff story if you truly need a cat a metal cat may not work they are not that effecient

Rogue_Ant

What are you using to get backpressure readings?


Rogue

pete95zhn

I have full 3" exhaust with one of those.

ian kam

pete how is it ?? Did you loose alot off performance ?? Did it change the tone of the exhaust ? Any feed back will be helpful.

wolfenstein

i have a snap-on test gauge made for that great tool to test for cat probs unscrew 02 install adaptor connect gauge start car i used the bung on my wide-band for that hookup, to test for backpressure in the x-over i used a length of silicone hose and the same gauge

pete95zhn

hard to tell if I lost performance,b/c I dont have "before" dyno readings.IMHO it was the best option for a cat,I needed one b/c of local rules and I'm too lazy to fiddle with test pipes.Exhaust tone is very low,I have just that and a big Magnaglow muffler and its still almost too quiet.Doesn't draw too much attention.
I can't say if it's the cat or my turbo that causes the most of the backpressure,but it's almost two times boost at 6000rpm+.
My turbo is completely modified KKK27/6 and I get 348hp @ 5568rpm and 506Nm ( = 375lb-ft ) @ 4056rpm ( both at flywheel ).

Driftomagnifico

LOL, putting a cat on a modified turbocharged car is a waste of money. While I can appreciate it's environmental benefits anyone with a chemical understanding knows that a turbocharged car provides everything required for maximum cat death.

At 300whp a nice high flow cat is maybe hindering you 2-3whp tops with about 100 - 200 RPM of spool difference. If the cat would live longer I'd probably put one on my car.