GXP Exhaust

[99prixgt]

just drive around with no mufflers.

 

[nmp0098]

Check this out:

The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq

Sound Off in Quietest to Loudest (Decibels):

1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).


Found this over at ls1tech, and it points to a rustang site and eventually a rustang rag. Notice that running without a muffler is the loudest, but also gave the lowest power. I never would have guessed that was the case, although some people pointed out that there wasn't any tuning done. It makes me wonder if a cutout always helps power, or if you have to tune to take advantage.

I wish that there were more tests like this out there. But this is the test that is pushing me towards the Hooker Maxflows cause they cruise quiet (so my wife won't complain) but when you jump on it everyone knows.

Muffler flow and dB comparison, Hooker Maxflow & Bassani Real Street? - LS1TECH

 

[GXPFiend]

If you don't mind me asking. What is the intended purpose of you modifying your vehicle. Race, Street, or Bragging rights?

My primary goal is to have a true 12 second car. I don't want to go faster than that. I drive me car on the highway and have to be realistic about it.

To keep a little low end torque you need a little back pressure to maintain drivability.

Talk to engine builders and pro racers to get a better insight on this whole exhaust thing. Let not get too crazy for the street.

Honestly, not looking to go much faster, I just want my car to look and sound good.

 

[GXPFiend]

they are beast if you get the single chambers, I had the dual chamber first but they didnt quite put out the noise I wanted...I mean they sounded good just not loud enough. just look at my videos on youtube to see what singles sound like for the newer vids, the older ones like the accel. and the dyno are the dual chamber.---------oops just went and checked, youve already commented on a couple of vids:th_coocoo:

No GXPFiend is a different guy on youtube. I just took his handle. I posted on one of your videos, jsrhkmk7 is my handle on youtube.

 

[TheOtherNick]

We put a lot the vr series race mufflers on trucks at work. They sound really good. They are not very expensive either they are made by xlerator.