exhaust systems

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exhaust systems

Post  Ashburner on April 4th 2013, 3:47 pm

Hi guys,

I´m currently putting parts and setup together (with Lem, thanks a lot!) for my 521 street-build. right now I´m wondering which exhaust (system) would be the "best" for my application. Do I need to go 3" or is a good (what is good???) 2.5" system ok too?
I didn´t really care about exhaust until now so I would need your help there.
My build will be a 521 with about 650hp, SCJ heads, stealth intake, etc.. and will be used 95% on street


Cheers
Franz

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Re: exhaust systems

Post  IDT-572 on April 4th 2013, 4:45 pm

3 inch minimum and a straight through muffler for best performance. Chambered muffles are somewhat restrictive unless sized about 1 1/2 sizes bigger.

You can go quiet and smaller but your power will be hurt.
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Re: exhaust systems

Post  NO FAIR on April 5th 2013, 11:37 am

I have a VERY similar build and I am running 3" exhaust with an X pipe with hooker aerochamber mufflers dumped at the rear axel. It sounds awesome but loud.
Dave
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Re: exhaust systems

Post  bb429power on April 5th 2013, 11:50 am

IDT-572 wrote:3 inch minimum and a straight through muffler for best performance. Chambered muffles are somewhat restrictive unless sized about 1 1/2 sizes bigger.

You can go quiet and smaller but your power will be hurt.

Not to hijack this thread, but how much would it have an effect on performance? Reason I ask is I have chambered mufflers, they were a gift, not really my choice.
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Re: exhaust systems

Post  IDT-572 on April 5th 2013, 1:34 pm

I have seen a 2 tenths drop at the track on a 450 hp small block. As far as hp just a guess 20.
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Re: exhaust systems

Post  ianxy351 on April 6th 2013, 3:37 am

NO FAIR wrote:I have a VERY similar build and I am running 3" exhaust with an X pipe with hooker aerochamber mufflers dumped at the rear axel. It sounds awesome but loud.
Dave
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I would run this system with a 521 but not dumped. Run rear 3" pipes and you will drop some of the noise that a dumped system generates.

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Re: exhaust systems

Post  Dave C. on April 6th 2013, 8:14 am

Yep , all dumps are good for is kickin up a lot of dust..

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Re: exhaust systems

Post  Dave C. on April 7th 2013, 4:25 pm

Purple Hornies !! cheers

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Re: exhaust systems

Post  Ashburner on April 7th 2013, 5:03 pm

No way, they don't sound good.. They're just loud

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Re: exhaust systems

Post  Dave C. on April 8th 2013, 12:28 am

I was joking ...

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Re: exhaust systems

Post  dfree383 on April 8th 2013, 12:53 am

Put as big of pipes as you can fit IMO 3" is a minimum at 650hp level for a full exhaust.

I like Magnaflow mufflers, they have worked very well on my EMC stuff.
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Re: exhaust systems

Post  Ashburner on April 8th 2013, 6:45 am

Dave C. wrote:I was joking ...

Thank god cheers I was doubting Question

So the only available complete system for a street driven ´69 Mustang is the 3" Magnaflow?

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Re: exhaust systems

Post  dfree383 on April 8th 2013, 7:07 am

out of the box.
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