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cats on a classic?

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cats on a classic? - 7/29/2007 2:13:23 PM

Smothers

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From: North Idaho
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Am considering adding catyletic (sp?) converters to my 65 but am wondering 2 things:

1. How much will the cats alone cut down on environmentally unfriendly gasses?

2. How much HP can I expect to lose (based on a 350hp engine)?

Things to factor in are that I have dual exhaust w/ headers and flow 40,s and would run two cats. Also I currently don't have a H pipe but would have one installed at same time.

Post #: 1

RE: cats on a classic? - 7/29/2007 2:46:29 PM

Colorado_Mustang

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1. None. The atmosphere is already loaded with every gas your car will emit. Worry about things that are within your control. Nature will take care of herself quite fine.

2. Not much if you get the right cats.

3. What other mods are you planning to support your new mega-heaters (in a car not design for them)?

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Post #: 2

RE: cats on a classic? - 7/29/2007 2:47:36 PM

66GTKFB

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Are you nuts?
Jim

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RE: cats on a classic? - 7/29/2007 2:51:13 PM

Colorado_Mustang

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Me? No. The OP definitely needs psychiatric care, however.

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RE: cats on a classic? - 7/29/2007 2:51:40 PM

Soaring

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quote:

ORIGINAL: 66GTKFB

Are you nuts?
Jim

+1 on being completely nuts. Why choke down a perfectly good classic engine just because you may want to save the spotted owls in Oregon.

(in reply to 66GTKFB)

Post #: 5

RE: cats on a classic? - 7/29/2007 2:58:17 PM

my77stang

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From: Citrus County, FL
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ya im a little lost on this one

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wat?

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Post #: 6

RE: cats on a classic? - 7/29/2007 3:00:04 PM

66GTKFB

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Idaho, Glen, Idaho - and the prevailing winds go East, so it's Montana and Wyoming that get the crud.

Seriously, your car is not set up to give the converters any opportunity to function. On older catalyic converters equipped cars, there were retard distributors, air injectors, special heads and more odd devices to make them work poorly at best. When computer controlled engines were developed, all that stuff came together.

Jim

(in reply to Soaring)

Post #: 7

RE: cats on a classic? - 7/29/2007 3:08:39 PM

Soaring

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Jim I am still laughing. And I mean hard laughing. That is about the funniest thing I have read on here in many moons. Blows East huh?

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Post #: 8

RE: cats on a classic? - 7/29/2007 3:12:59 PM

67mustang302

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quote:

ORIGINAL: Soaring

quote:

ORIGINAL: 66GTKFB

Are you nuts?
Jim

+1 on being completely nuts. Why choke down a perfectly good classic engine just because you may want to save the spotted owls in Oregon.

Bwuahahaha!!!

Seriously though, you don't wanna put cats on your car. All they do is reduce the amount of "bad gasses" you produce(by a marginal amount at best) but in turn create 2 tin boxes under your car that become classified as hazardous waste by the EPA and have to be placed in a toxic waste dump forever. That and it'll mess up your power, the heat they generate in your exhaust gas will throw off the way the system functions, the exhaust will get hotter and expand and cause the exhaust system to become more restrictive.

And like Jim said, your car was never really intended to let them work right, especially without all the bells and whistles. Cats were a band aid on a problem that no one knew how to fix back in the day, and have since been mandated and without computer control are basically worthless(unless your goal is to reduce power).

All you'd see with cats would be a decrease in power and mileage. If you want to be environmentally friendly buy a new Hybrid(though their effectiveness is debatable as well)

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Who cares how much horsepower it has, all that matters is how fast it goes!

Best run 13.23 at 106.97mph with a 2.183 60'
Times from before tune and driver mod.

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Post #: 9

RE: cats on a classic? - 7/29/2007 3:42:02 PM

66GTKFB

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On my 79 Dodge van B200 360 V8, I used a 'catalyic converter test pipe', except when I needed to get smog tested. I sold the van at 110,000 miles (got a Ford E250) with less than 5,000 miles on the 'cat'.
Sometimes J C Whitney comes thru.
Jim

(in reply to 67mustang302)

Post #: 10

RE: cats on a classic? - 7/29/2007 4:36:57 PM

Tony R

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how we fix cats up here are we take them off our cars and use a long rod and ram them down the cat untill you have the cat gutted(works on real cats too ha ha) put it back on your car and drive it. I would never purposely put one on a car unless I HAD to pass emisions.

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Post #: 11

RE: cats on a classic? - 7/29/2007 5:10:07 PM

blueovalboy7

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Please no, you don't need them, they weren't supposed to be on the classics, and like previously stated, why choke your engine with them. Just forget the idea all together.

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Post #: 12

RE: cats on a classic? - 7/29/2007 5:59:12 PM

jcomp

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quote:

ORIGINAL: Soaring

Jim I am still laughing. And I mean hard laughing. That is about the funniest thing I have read on here in many moons. Blows East huh?

I had the unfortunate experience of living in the bowels of Idaho for a few years. East indeed.

(in reply to Soaring)

Post #: 13

RE: cats on a classic? - 7/29/2007 6:38:52 PM

andrewmp6

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i think your nuts i doubt your engine would get them hot enough to work. and if you place them in the wrong spot to close to the engine or to far back its just like not having one.every car and truck i have owned i took all the smog crap off cats egr pcv valve. i do run a valve cover breather works fine. the way i look at if your mustang needed cats they would been on there when it was made. unless your gonna use a efi 302 out of a fox body your just gonna kill power and get worse gas milage.

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Post #: 14

RE: cats on a classic? - 7/29/2007 7:29:07 PM

Oxnard Montalvo

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From: Townsville, USA
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Take the money for the cats...and...

Run out and buy yourself some carbon credits!
Sleep guilt free!

http://www.terrapass.com/road/whatyouget.html

It's Americans like you that will save the planet.

MAKE AL GORE PROUD.

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Post #: 15

RE: cats on a classic? - 7/29/2007 7:34:09 PM

robert912004

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quote:

ORIGINAL: andrewmp6

i think your nuts i doubt your engine would get them hot enough to work. and if you place them in the wrong spot to close to the engine or to far back its just like not having one.every car and truck i have owned i took all the smog crap off cats egr pcv valve. i do run a valve cover breather works fine. the way i look at if your mustang needed cats they would been on there when it was made. unless your gonna use a efi 302 out of a fox body your just gonna kill power and get worse gas milage.

Why dont you have a pcv valve? it actually increases gas mileage?

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Post #: 16

RE: cats on a classic? - 7/29/2007 7:53:14 PM

67mustang302

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Who cares how much horsepower it has, all that matters is how fast it goes!

Best run 13.23 at 106.97mph with a 2.183 60'
Times from before tune and driver mod.

(in reply to Oxnard Montalvo)

Post #: 17

RE: cats on a classic? - 7/29/2007 10:03:38 PM

Colorado_Mustang

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PCV valve hurts my engine...been there, done that. Depends on what you're runnin' as to what works...but cats will not work on a carb'd car without a bunch of add-ons...including a lot of insulation to prevent cabin fires. The biggest thing is that a carb'd engine can't run lean enough to heat up the cats so they can do their job as well. They do make better cats that take less heat, but a carb'd engine will still have problems.

BTW...the air pumps that push air into the cats were a coverup...injecting air into the stream to get the averages where the EPA wanted them...

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Post #: 18

RE: cats on a classic? - 7/29/2007 10:11:32 PM

andrewmp6

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pcv dumps in the carb/intake a breather it dumps in the air i dont know if it helps mpg i do it since it looks better and no oily gas pumping in my intake.

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Post #: 19

RE: cats on a classic? - 7/29/2007 11:43:01 PM

Smothers

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