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Anyone here hitting 450-500 RWHP with a single 3" exhaust pipe?

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Old 04-15-2010, 10:02 PM
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Originally Posted by 1slow01Z71
You talking about lil sis?
Gah I dunno, one of his trucks, that was making big powa
Old 04-15-2010, 10:04 PM
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The rcsb white gmc with a 370/pt-88? If so it has a cutout, when I saw it at SAR you could see the exhaust blowing the burnout smoke off to the side under the truck back in Feb when I saw it.
Old 04-15-2010, 10:07 PM
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I don't want to use a cutout. I just want to keep the setup as quiet as possible using magnaflow mufflers. The problem is, running a true dual setup with magnaflow muffs doesn't leave me a lot of room since I'm a RCSB. I'd have at least another $500-$600 in exhaust going to a true dual setup. If I go with a single 3" setup, I already have that catback setup. I'd just need to tie into what I have and be done.
Old 04-15-2010, 10:11 PM
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With my new cam, heads and headers coming, I just want to make sure the exhaust will easily support 450-500RWHP. If so, I'm golden. That's why I was checking to see what guys were able to squeeze out of a 3" setup/.
Old 04-15-2010, 10:12 PM
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Sounds like you already knew the answer to your question before you asked it then? You dont want to spend the moeny on duals, you dont want a cutout, that only leaves keeping what youve got. I fail to see what is wrong with using a cutout but whatever you want.
Old 04-15-2010, 10:14 PM
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Originally Posted by hirdlej
With my new cam, heads and headers coming, I just want to make sure the exhaust will easily support 450-500RWHP. If so, I'm golden. That's why I was checking to see what guys were able to squeeze out of a 3" setup/.
Patrick G gained 15rwhp on a H/C/I 346 by just adding a flowmaster collector with a 4" cutout. Search over on tech you will find that a single 3 is not enough for the hp you want. There will be power left on the table.
Old 04-15-2010, 10:15 PM
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No, I don't know if anyone using a 3" catback pushing decent power. That's why I'm asking. I could do a cutout but I only do my driving on the street. I want my full power potential at all times.
Old 04-15-2010, 10:16 PM
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Originally Posted by hirdlej
No, I don't know if anyone using a 3" catback pushing decent power. That's why I'm asking. I could do a cutout but I only do my driving on the street. I want my full power potential at all times.
Thats what the little electric button is for
Old 04-15-2010, 10:16 PM
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Specs on the new setup? I'm curious how a new cam and heads is going to gain 100 rwhp.

Regarding the exhaust, why don't you be the test dummy? Much like you I question the ability of a single 3" catback to support 450 rwhp....however, seeing stock48 go 9s on a 3.5" pipe makes me think 3" is more than enough.
Old 04-15-2010, 10:22 PM
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Having a power adder changes everything, exhaust scavenging expecially in a turbo setup is no where near as critical as an NA engine.


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