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Old 07-10-2007, 12:06 PM
454C10 454C10 is offline
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Just because a muffler sounds loud doesn't it mean it flows well. It can also mean it is a low quality muffler makes a bunch of back pressure and doesn't muffle sound very well. furthermore, a loud sounding engine can seem faster when it really isn't.

Did you look at the web site that I listed before?

For example:

2-1/4 glass pack flows 133 cfm and is loud as hell

2-1/4 stock OEM muffler flows at 149 cfm and is very very quiet.

2-1/2 dynomax super turbo flows 268 cfm and is also very quiet.

So which is the better muffler?

A loudass flowmaster doesn't even flow as much as a quiet dynomax super turbo.

So in theory, if you use dual 2-1/4 glasspacks for a total of 266 cfm, it would have enough flow for a 120 hp engine (2.2 cfm/hp for zero loss). That is, after 120hp, the dual glass packs start killing power. Twin dynomax's start losing power after 240hp.
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