exhaust silencer - others affects

[runrabbit]

Apart from the obvious of lowering the exhaust volume - what effect does the silencer have on the exhaust flow/power of the car?

I\'m assuming there is increased back pressure as the exhaust flow is restricted. Does that equal less power but improved economy/driveability?

Am doing the Akld - Wgtn run this week and wonder whether to remove the silencer or not (legality and noise pollution aside).

she\'s pretty loud with the silencer out ;D

98 wrx with 3" tbe, and peak boost 19psi :-\

[Marky]

Less flow = less power = less economy (in theory)

Back pressure is the devol in a turbo car

Whether you\'d notice any difference in economy i have no idea/opinion, depends how you drive, just pack the boot full of pillows to muffle some of the err, muffler noise haha

What you\'re doing is basically forcing your car to breathe through a 1.5" straw, there\'s no positive effects other than it cutting down noise

[titian]

Leave it in.Less drone on the 6-7 hour trip. Probably about the same on fuel. However that depends on how often you stand on the gas pedal too

Quiet does not attract attentions of the unwanted stopper too. (copper)

[Joker]

Loud is not faster : have dyno proven that BUT with two different exhaust\'s on keltik\'s GT30 (he had flange so could swap between a cannon and a brand name muffler)

sorry not really any help, only dyno can tell a tale really

[94 Leone]

I hearf some bs once that silencers cause your valves to melt. Lol. It was a flatpeaker, so naturally i took it as verbal diaorrhea. Any truth?

[Marky]

Car makes say 250 hp with a stock exhaust

Makes say 260 with a 3 inch one

What happens if you go to smaller than stock size

[pedro]

you melt your valves...

[runrabbit]

im not the fastest driver around, and always throttle back when passing the police just in case.

i have to do the reverse trip the following week, so will do it one way with the silencer in, then remove it.

other than the volume, i don\'t think there\'ll be a noticable difference.

cheers y\'all