Exhaust set up - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-20-2008, 12:44 AM   #11
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Quote:
Originally Posted by Mr.Firemouth
2. He wants to remove factory resonator after converter and install pipe from converter to muffler.
Pro'*/con'*?????
it'* all preference... it will get louder, but more raspy (less deep and throaty)

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He suggested I go ahead nad replace the muffler and add tips. He wants to use the magnaflow Firebird/camero muffler with 2.5 in and dual 2.5 outs. He said this would be a great sound.
I am unsure if it will be too loud and not sound right for the type of car.
Any sound clips of this type of set-up????
This is what most people here do... you can find sound clips using the search, but the clips sound much different than the pipes will in person. It won't be too loud though. louder than stock, but nowhere near obnoxious.
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Old 02-20-2008, 12:48 AM   #12
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Thanks.

There is one more discussion we had about the manifolds.
I asked if he did manifolds and he does. I asked if he could weld any cracks and re-install the manifolds. He said yes.

Then he said it would be better to just get new OEM manifolds and replace the old ones.
Is he right? Is that what I should do?
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Old 02-20-2008, 12:52 AM   #13
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Fix your cracks in the manifolds, and leave them unported.

http://www.bonnevilleclub.com/forum/...ic.php?t=80339


If you lose your resonator, you'll regret the ricerish noise. My 93 SSEi didn't come with one (started in 94). I ADDED one to tone it down and give a mellow throaty sound at mid-throttle. A nice lumpy idle, too.
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Old 02-20-2008, 01:46 AM   #14
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Bill, I asked about replacing the pipes with new OEM parts because the exhaust guy thinks after fixing them they will just crack again. He may or may not understand the problem.

I am also unsure he really wants to fix them. Would it be better for me to remove the manifolds myself and take them to a machine shop to be repaired?

In my neck of the woods these guys really don't want to mess with manifolds. Most shops are hit/miss for quality in the area. The Magnaflow dealer is the first guy Ok with doing the work. He hasn't quoted price yet.
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Old 02-20-2008, 09:20 AM   #15
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New OEM manifolds will crack. When you install them, they become stressed. The cracks are a natural stress relief. You weld those cracks in the pre-stressed (been installed and cracked) condition, and you don't have a problem again.

Weld the cracks. Explain it to your exhaust guy just as I worded it above. They should understand the reasoning perfectly.
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Old 02-27-2008, 12:20 AM   #16
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The guy who welds for the "Turbo Connection" wants to know what kind of steel the exhaust is made of. Stainless? Or something else?
This would be the 2 EM and the crossover pipe.
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Old 02-27-2008, 12:57 AM   #17
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the manifolds are cast iron I believe well at least on the series two I dont know about the series one and the exhaust is stainless steel
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Old 02-27-2008, 09:05 AM   #18
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Neither manifold on the S1 are cast iron. Both are stainless.

GM never made better OEM manifolds than they did on the S1 L27 and L67, hands down.
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Old 04-01-2008, 06:46 PM   #19
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OK, been working alot and now got some time off.
I gave the part# for the High spun metallic cat from magnaflow to Mark Muffler and they called Magnaflow. After discussions they feel if I install this I will have a fault code of "Low catalyst"(or something like that related to the cat.)

What would be the best option for a cat for my 94 Bonnie?
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Old 04-01-2008, 07:24 PM   #20
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'94?

Should only have a pre-cat O2. Without a post-cat O2 the PCM has no idea if the cat is working or not. That code should not be possible.
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