924Board.org

TheFuzz89 · Posted: Sun Oct 22, 2006 8:51 am Post subject: Modifying exhaust?

I am looking for a deeper, more throaty tone for my 1977 924. I was wondering - what is the best exhaust/muffler option, with cost in mind?

From what ive read on here, magnaflow with 2.25"/2.5" piping is the way to go...

Please... correct me if im wrong, but from what i understand, this is the how the stock exhaust is set up on the earlier 924's...

If this is the case... i would like to do this to it... (if not > let me know)

I'm not looking for any huge horsepower gains... I already know the most i could get would be around 1 or 2 hp, but does anyone know if this would help/harm the car?

And yes... my state requires a cat, so that's not an option (legally).

Thanks
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1977 Porsche 924

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

My setup is exactly what your second picture looks like. I have a flowmaster on it. Flowmasters are a bit too loud for my taste, so Ill probably get a different muffler. It does sound really good though, its just annoying around town.

I had the timing way off on my car once(on accident), and it literally sounded like a racecar with that flowmaster.

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

Joes924Racer · Posted: Sun Oct 22, 2006 10:08 am Post subject:

Any aftermarket cat will work..right..
I dont have one.

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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

TheFuzz89 · Posted: Sun Oct 22, 2006 2:28 pm Post subject:

JB 924 · Joined: 03 Apr 2006 Posts: 606 Location: Hessen, Germany

I just don't get people in North America. Why the hell would you straight pipe your car or truck? Especially our cars. I'm not saying go buy a cat if you don't have one, even though you should, just because you should care. But seriously. You take the cat off the car. Then what? You get 4 more horsepower. Yeah, I'll bet you'll be kicking ass on the streets now. That's 124hp to play with. Minus 30 years of use and abuse, so that's maybe what, 110hp? Way to f'n go. And if you have a high horsepower car, I don't see the point either. If you a 505hp stock Corvette, do you seriously think you're gonna be a king at the track with 10 more? Jesus Christ, all I ever hear is about people straight piping their POS vehicle, that'll never see a damn track in its lifetime anyway. Do I just care too much for the surrounding environment, or is the average person a f'n idiot?

No offense to any of you guys. Just askin'.

TheFuzz89 · Posted: Sun Oct 22, 2006 10:31 pm Post subject:

I dont think anyone here is saying not having a catalytic converter is a good thing... I was only kidding about drilling mine out. And as I was saying before, I dont care about gaining more horsepower... i just dont wana do something that loses the hp I have/harms the car.

Plus i'd like it to sound nice, and that doesnt require cat removal.

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

I ditched the cat on my car. Pulled it off a few years ago to find it was completely clogged with soot. My guess is most 924's are running with an almost completely clogged cat after 20+ years. It is a wear item like a fuel filter or oil filter, but it never gets changed. The responsible thing to do is to buy a new replacement. I bought a test pipe for $29.99 instead.
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1987 951 - M193 Version for Japan

Paul · Posted: Mon Oct 23, 2006 1:27 am Post subject:

A couple of comments:

First, the last I checked Canada (even Alberta) is part of North America. So you're one of us!!!

Second, please post the receipt for your new cat and I will believe your environmental concerns. (Unless your cat has been replaced in the last decade, it's not working, so you are polluting at least as bad as a straight pipe.)

Third, some of us are pretty hard to offend....

TheFuzz89 · Posted: Mon Oct 23, 2006 2:04 am Post subject:

Paul... is that side pipes i see on your Avatar?

And also... can we maybe get back to my original post?
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1977 Porsche 924

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

with a cat, the magnaflow would have a good sound and not be too loud...

without the cat, the magnaflow muffler would be too loud. We've tried it on a couple 924's and the noise level was a bit much.
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Classic British Sports Car Restoration v6 + v8 Engine Conversion Swaps

Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine

JB 924 · Joined: 03 Apr 2006 Posts: 606 Location: Hessen, Germany

Paul, READ THE SIGNATURE!!! LoL. Kidding. My car hasn't been running for the last 4 months, but as soon as I start driving I will get a new exhaust done, and yes, it will get a cat, because it doesn't presently have one. I will show receipts. Promise.

DS-777 · Joined: 16 Sep 2005 Posts: 134 Location: Michigan USA

Well no offense, I agree that something drastically needs to be done to help clean up the environment, but you're driving an old inefficient sports car. You're just generally preaching to the wrong crowd. Plus, these are mostly weekend cars. If he was taking the cat off his Prius hybrid, I'd be more on your side, but these cars aren't about that.

Plus like Paul said the cat probably isn't working, and I for one, don't want to spend the price of my car for a new factory one.
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Gone: 1981 silver 924 w/ black int. and a 5 speed.

JB 924 · Joined: 03 Apr 2006 Posts: 606 Location: Hessen, Germany

I hope I haven't started a huge argument here,

but:

1. From what I've been hearing, the 924 is quite efficient considering mileage, and also quite efficient in terms of emissions. If it is very inefficient, would that not be another reason to put one on? A Prius produces 70% less emissions than a comparable car.

2. Lots of places sell cats for $60. http://shopproducts.howstuffworks.com/KEYWORD-Catalytic%20Converters

3. As far as I know, there are quite a few people here who drive their 924s regularly, or use them as daily drivers. (I realize this might be a minority)

4. Every little bit helps, or not? There are 600 million cars in the world, if half these people take the cat off because "the car is old anyway," that's a hell of a lot more emissions in the air.

Paul · Posted: Mon Oct 23, 2006 6:36 am Post subject:

JB 924

Your signature says you live in North America. My family is from Scotland (left in 1649), but I don't keep telling people.

Did you know that any new Honda car sold in the US, will pollute the air less in it's lifetime than the pollution caused by spilling one gallon of gas on the ground?

That a 2007 911 Turbo driven in LA actually cleans the air (the air comes out of the exhaust cleaner than what's drawn into the air cleaner)?

That some people believe cows are the leading air polluters in North American?

BTW good luck with the $60 CAT.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

Paul · Posted: Mon Oct 23, 2006 6:45 am Post subject: