Dual 5" exhaust? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 11 Old 03-12-2003, 11:43 AM Thread Starter
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Dual 5" exhaust?

I know someone thats want to put this on his car, I told it was too big. He said its perfect for a turboed car.

He reasoning is turbos do not like back pressure, so the bigger the exhaust the better.

Is he right?


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post #2 of 11 Old 03-12-2003, 07:57 PM
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well you have to remember that if you go with dual exhaust, you are actually splitting ONE exhuast pipe (if its a single turbo...) into two exhaust pipes. generally when you do something like this you would make the two pipes a smaller diameter than the one which is being branched off of. i dont know for sure, but i would say dual 5" is 2.5" too much =)


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post #3 of 11 Old 03-13-2003, 02:28 AM Thread Starter
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He is talking about a TT set up. I agree too big as well. My problem is, I do not know how to explain why?

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post #4 of 11 Old 03-13-2003, 06:47 AM
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Twin 3" for better clearance. imo..

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post #5 of 11 Old 03-13-2003, 07:52 AM
 
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I would LOVE to see how he is going to fit 5" downpipes past the strut tower/block/header area. Nick
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post #6 of 11 Old 03-13-2003, 01:14 PM Thread Starter
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Its actually going on a GTR, but an engine is an engine.

I have received valuable information from this board that crosses over into other types of cars.

That is why I queried on here. Thanks for your input.

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post #7 of 11 Old 03-13-2003, 06:23 PM
 
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5" would be extremely too big, yes turbos do not want back pressure but then people think well lets just go huge and that way there will be no back pressure at all. I will look it back up but if you get the book "Maximum Boost" by Corky bell, he explains it to a tee about how wide of exhaust to go. For one tailpipes are terrible on tuboed cars. I am going single with just a 3" downpipe going back to a Race Magnum all 3" then dump it right before the axle. But yes you can go to big and remember no chamber muffler
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post #8 of 11 Old 03-15-2003, 04:00 PM
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Maybe for around 2000hp, but not for anything less. Dual 3" will be plenty up over 1000hp.

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post #9 of 11 Old 03-21-2003, 12:22 PM
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i dont run any mufflers at all. Just dump pipes off the h-pipe. I am going to get a catback eventually but I have had no problems so far with the setup like that.

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post #10 of 11 Old 03-25-2003, 01:00 AM
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That'd be the perfect size. If it were a Peterbuilt.

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post #11 of 11 Old 04-12-2003, 11:44 AM
 
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You won't lose power from dual 5's....but you reach a point of no return. 3 inch dual or 4 inch single, plenty eitheir way.
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