Catalytic Converter Placement?

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Racing_Rush
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Catalytic Converter Placement?

Postby Racing_Rush » Thu Mar 23, 2006 12:49 pm

Ok everyone thinks that catalitic converters rob horsepower because back in the 70's they were big, inefficent, and restrictive but with todays technolgy its actaully possible to get great milage, horsepower and still save the environment.  

But thats not the point I want to bring up.  All new cars have placed the catalitic converter bassically right off the exhaust manifolds because it needs to reach like 1300 degrees before it "lights off" and the closer it is to the engine the faster you start saving the environment.  

I am doing up an exhaust system and I want to do a side exit because it just looks much cleaner than a muffler hanging out the back.  That means I have to put the largest round muffler possible where the catalitic converter usually resides... So I wanted to get a high flow cat and put it pretty much right off the exhaust manifolds and put some sort of stick on tin/insulation heat bearier on the fire wall.  Good idea?  This is not only to have cleaner exhuast (not a porblem in my province with no testing what-so-ever) but mainly to quiet the exhaust down because I wont have a proper muffler with baffels.  (I might have to use a resonated tip to but I hope not to).

Anyways this is on a 3.1 and I want to do my system mandrel bent aluminized piping, in 2.5" any ideas or suggestions?


1991 Cavalier Z24- Racing seats, MSD wires, relocated MSD coils, 2.5" exhaust, ported exhaust manifolds, high volume oil pump, poly grafite front end, 92+ brake upgrade, drilled and slotted rotors, 1.5" lowering, 17" Klasse wheels...

Future Plans: 18's, paint, rear discs, more horsepower...

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1988GTU
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Catalytic Converter Placement?

Postby 1988GTU » Thu Mar 23, 2006 9:39 pm

I would say the Cat idea is done already.  Look on the Furd Focuses, it sits vertical basically going down as a part of the down pipe.  It's a stubby sucker and for the muffler... I don't look into mufflers much, because I don't use them since when the factory one falls off, I go with straight flow loudness.
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rweatherford
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Catalytic Converter Placement?

Postby rweatherford » Thu Mar 23, 2006 9:56 pm

Should work fine.  The only problem with heat you will have is probably the steering rack.  Just keep an eye on it.


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wicked-irocz
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Catalytic Converter Placement?

Postby wicked-irocz » Fri Mar 24, 2006 5:56 pm

theres plenty of room below to mount both a cat and glasspack type muffler (only thing that really tucks up in there) and most cats only need to reach 600* to light off.  I would be pretty scared to put a cat that close to the rack.


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IsaacHayes
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Catalytic Converter Placement?

Postby IsaacHayes » Sat Mar 25, 2006 5:42 pm

I've had issues with the stock downpipe rubbing the firewall when I had broke my passenger upper motor mount. In reverse it would rub. Not sure if a cat would fit, especially one  that's big enough to flow well..


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gar187er
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Catalytic Converter Placement?

Postby gar187er » Sun Mar 26, 2006 8:10 am

stop being a tree hugger, and say the hell with the cat!!!! :) you're in canada, theres enough trees to offset your soon to be catless setup  :banana


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Racing_Rush
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Catalytic Converter Placement?

Postby Racing_Rush » Mon Apr 03, 2006 11:56 am

Hey thanks for all the posts I heard a Mach1 Mustang roar by the other day I am not sure with aftermarket exhaust or not but it sounded so hot.  I am thinking now of just running 2.25" mandrel bend pipe over the rear axle then into a Flowmaster 40 series and myabe put a resonator if I need too.  Thoughts? Sound clips?


1991 Cavalier Z24- Racing seats, MSD wires, relocated MSD coils, 2.5" exhaust, ported exhaust manifolds, high volume oil pump, poly grafite front end, 92+ brake upgrade, drilled and slotted rotors, 1.5" lowering, 17" Klasse wheels...

Future Plans: 18's, paint, rear discs, more horsepower...


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