backpresure?

[chris.]

hey all
just wondering how nesesary backpresure is with a vr6

is there
A: no differance
B: power gain
C: power loss


i am currently running 1 resinator & the standard rear muffler and am considering removing the rear muffler?
so it will basicly be straight through

thoughts?

[chockz]

wat's the piping size? 2.25, 2.5, 2.75 or 3? standard is 2inch...NA or FI?

[chris.]

N/A
and not shore on size from the top of my head but i think its 2.25

wat's the piping size? 2.25, 2.5, 2.75 or 3? standard is 2inch...NA or FI?

[h100vw]

Looking at ETKA, I reckon it's 2 inch. I'd not be removing the rear silencer, it's the one that does the most work.

Gavin

[chris.]

it's the one that does the most work.

Gavin

and by that you mean?

[h100vw]

It takes the most noise out of the exhaust.

Gavin

[Tim]

the standard size on a vr6 is 2.125" from memory.

If you remove the rear muffler without putting something else in its place you will be too worried about your ears bleeding more than how much power you have.

[chris.]

lmao not to worried about noise lol
*i am a dumb teenager remember

thinking of just after the rear beam putting a flange so i can easily fit back the standard box when wanted .

[Jarred]

it'll be SOOOOOOO loud without a back box.

wouldn't recommend it if you actually enjoy driving.

[Mrk_Mickey]

I'd suggest taking out the middle suitcase resonator if anything mate..Branko has done that and it's not too loud. Either that, or just get a cheap catback system with two more mufflers behind the cat (instead of the three that are already there). The VR6 sounds great with just a little opening up. Too much and it will drone like hell!!

[Golf Loon]

I remember Brenton having a removeable exhaust and driving round centenial park with no exhaust on our first ever golf cruise.

Damn loud though. I think he is still a bit deaf now.

He also had a side exit exhaust for a while coming out behind the drivers door.

[The_Hawk]

it'll be SOOOOOOO loud without a back box.
wouldn't recommend it if you actually enjoy driving.

Oh yeah, if you like your ears just don't go there.

As first I pulled everything out of mine and had 2" straight through to a single rear muffler. It was loud and droney as all hell. It didn't bother me too much when I was by myself, but when I went on a cruise and put the kids seats and wife in the car they didn't like it so much.

Sounded like this:

http://www.youtube.com/watch?v=91iON0oAS4s

I then went to a 2.5" mandrel bent Lukey system so I now have cat -> flange -> 2.5 -> resonator -> resonator -> flange -> rear box:

http://www.youtube.com/watch?v=ZZFjj2OBSvs

The new system is much better, still got a serious growl and it still has some drone inside the cabin, but not as much as before so it's bareable, even with the family in the car.


As for back pressure, I went 2.5" because I am thinking of running a supercharger at some stage in the future, this sets me up for that. But even if your not 2.5" is still not a bad size.

[Shteifen]

my exhaust wasnt stock when i got it, its got a stock resonator, and a no name rear box and sounds ace. so i suppose the mid muffler and rear box were removed to replace it with the single rear box.
i had another rear box that i bolted up to it (was made to bolt straight up by someone else) and it was a straight through muffler. i didnt even get a hundred metres down the road before turning back. all my neighbours came outside to see what kind of jet fighter had gone past their house.
im serious, do not remover the rear muffler unless your going to replace it with something that is not straight through. your ears will bleed.

might be ok with a turbo though, cos they seem to silence the note a fair bit from what ive heard.

-steve