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Old 01-23-2011, 02:53 PM   #31
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Originally Posted by neverfastenough1 View Post
Edit: Oops, should have read to the end. I didn't see Unliminted's post.
you stated it better than me you're right...there are plenty of examples of 12 sec daily drivers out there now...right off the showroom floor, with cats.

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Old 01-23-2011, 03:09 PM   #32
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you must not follow racing much then, because the muscle car theme is alive and well. and where it is alive and well, those vehicles will flat out smoke the fastest thing ever made pre-1973 (pre-cats)...and they'll do it getting 18mpg or better. Corvette's, Cadillac CTS-V's, WRX STI's, EVO-8's, light modded Talon TSI's, SRT-4 Neon's, Buick Grand National's, chipped diesel trucks that weigh 8000+lbs...will all leave a stock 1970s muscle car in the dust no problem...and get better mileage than the muscle car, even with catalytic converters.
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What is your definition of a Muscle car? A family car nowadays has more power than muscle cars of yesteryear. Look at the 350hp 6cylinder Taurus, the G8, the SRT8 Charger, the Cadillac CTS-V. Now look at the 400+hp Mustang, Comaro, GTO, and the Challenger. The V6 version of these cars still have more power than most of the Muscle cars of back then. This is not to mention, that there are 6-800 hp street cars all over nowadays. With a pulley change, you can get 500 out of a Terminator. Jeep SRT8, need I say more.

Edit: Oops, should have read to the end. I didn't see Unliminted's post.
Doesn't matter how fast something is...that just makes it a fast car.

I hate when people try to make things out to be something they are not...its like you wish you had a muscle car, so since your new car is fast you're going to call it one. Keep telling yourself that. And yes, I am absolutely a muscle car snob. Though not nearly as bad as some people I know.

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Old 01-23-2011, 04:54 PM   #33
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On one of the Mercedes fora where I mod we had this discussion back in 2007. One of the references that I posted up then was a comprehensive comparison done by Sport Compact Car magazine in 2006 regarding different configurations and results on a DYNO.

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Originally Posted by McBear
A very good study in Sport Compact Magazine did a bunch of dyno runs on Hondas with stock exhaust systems, headers+stock exhaust, header+catback systems, headers+ NOCAT+HiProExhaust.

The results were that, of the non-header group, the HiproformanceCat +HiProExhaust was only 1PWHP less than the system that eliminated the cats completely and went straight from exhaust manifold to HiPro Exhaust system. The CatBack+HiPro Exhaust was only 3PWHP less than the no cat system.
These numbers come from dyno testing of 200-240HP Honda stock street cars with exhaust modifications as the only variable.

I am working on finding a link to the original report. SCC went out of business in 2009 so their archives are not easy to find.
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Old 01-23-2011, 05:05 PM   #34
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And yes, I am absolutely a muscle car snob.
Ahh, the truth comes out....your definition of a muscle car is a pre-1973 non-catalyst car, with a big gas drinking engine that rumbles nice with dual pipes, but is not necessarily as fast as new catalyst vehicles today, and has absolutely nothing to do with this thread's topic of catalytic converters on Jeeps.
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Old 01-23-2011, 05:08 PM   #35
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Ahh, the truth comes out....your definition of a muscle car is a pre-1973 non-catalyst car, with a big gas drinking engine that rumbles nice with dual pipes, but is not necessarily as fast as new catalyst vehicles today, and has absolutely nothing to do with this thread's topic of catalytic converters on Jeeps.
Hey, I wasn't the one who brought up muscle cars in this thread. Simply pointed out that REAL muscle cars () never had cats to begin with.

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Old 01-23-2011, 05:17 PM   #36
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I say don't skimp out on something like a CAT, and just replace it. Not saying you will get caught, but there is always a chance. The fine is going to be a lot more than what the CAT will cost. Not only that, it's better for the environment.
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Old 01-23-2011, 05:30 PM   #37
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I say don't skimp out on something like a CAT, and just replace it. Not saying you will get caught, but there is always a chance. The fine is going to be a lot more than what the CAT will cost. Not only that, it's better for the environment.
Agreed...no reason to get rid of them. And if I recall correctly, the high flow cat I put on my Camaro back in high school wasn't that much more than the replacement - so if you want that option, ask your exhaust guy. On that note however, I actually didn't like the sound as well after installing that. I had headers and a cat-back Borla on that Camaro and liked the sound better with the stock converter. But for those looking just for a volume increase - it definitely achieved that.

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