Oh nice :-)

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Does it still put out the horsepower as a FI exhaust and FI long tube headers ?

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i dont have headers but the system it's self makes great power. he only thing i notice between with and without mufflers is possibly slight low end torque loss.

however its only in theroy since i feel it's just the added volume plays a trick that i think it should be pulling harder when it's not. havent had it on the dyno to test one vs the other.

To answer your question, I attached a dyno sheet of my car and Elmo370Z's car

On this dyno, I have AAM Short Tails, AAM Mid Pipe, AAM Resonated Test Pipes, Z1 Intakes, and tuning from Martin at Z Fever

Elmo370Z has F.I. 12" Exhaust, F.I. Long Tube Headers, Stillen G3 Intakes, and tuning from Martin at Z Fever

Having Short Tails does not affect power compared to a well designed cat back exhaust with mufflers in place. It does not affect low end power or torque, nor does it affect scavenging, because that happens at the H/Y/X pipe. (Loss of scavenging causes that low end power loss). IT WILL cause hearing loss ;)


http://i822.photobucket.com/albums/z...psg5xfmhle.png

My 0.02? Fab in a Borla or some cherry bombs. Everything else has been beat to death before.

What's scavenging ? Sorry I'm a noob at exhaust lol

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Not the easiest thing to describe but... Essentially your exhaust has natural pulses as cylinders go through the combustion process that travel through your exhaust. When it hits the merge collector of your header (exhaust manifold), it creates a vacuum, sucking out the old residual fumes still in your combustion chamber. You get an added bonus of Y pipes, H pipes, and X pipes benefiting scavenging as well. When your exhaust pipes are small, your exhaust velocity is high, helping scavenging at low rpm, but suffering from back pressure at high rpm. For naturally aspirated Z's, the magic number tends to be a 2.5" Y, H, or X pipe, dumping into either a 3" single or 2.5" dual mid pipes and out the muffler.

There you go, Scavenging 101.

Aaahhhh I see

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