exhast a lil to loud

dub-disaster · July 27, 2009, 10:17:59 PM

ok the exahst i have fitted to my g is a s/s powerflow system 2.25 " in bore with a twin exit back box its nice and quite untill you get to 3k rpm n then its mighty noisey wich is great when your blasting round the lanes it sounds awsome but when im on the motorway trying to cruise at like 70-80 it defens me and gives me a headache wich is a real pain in the ass as going to any shows means going on the motor way ! whats the best way to quiten it down a bit without restricinting the engine , would changing the back box to a single exit one help ?? would i have to change the entire system if i how can i ensure im not going to get deafend again ??

sinister polo · July 28, 2009, 03:47:47 AM

go back to a powerflow dealer and have them fit a resonator / silencer.
it wont realy make any difference if u have a single or double back box.

MartinB · July 28, 2009, 12:21:52 PM

have you got a straight through centre section? Sounds like you could well have. Like sinister polo says, get a silencer fitted

dub-disaster · July 28, 2009, 02:35:19 PM

it has got 2 boxes init i think i rember seeing a middle box aswell as the backbox one how do i locate a powerflow dealer in my area?

scotsjohn · July 28, 2009, 02:40:34 PM

Google ! Powerflow can tell you what you've got and what you need. I'm running 50mm and very happy with it.

dub-disaster · July 28, 2009, 02:41:11 PM

ok yes just been out and check and there is a smaller mid mox and a larger back box what can i do to make it quiter on the motorways now ??

DMWG40 · July 28, 2009, 03:07:25 PM

yeah I would like to know what they say etc.

hayesey · July 28, 2009, 03:23:54 PM

there's no "volume adjustment" on an exhaust, you'll need to get extra or different silencers put on. Or you could add exhaust packing into the silencers if they are empty but that'll involve cutting the box up, packing it and welding it shut again.

dub-disaster · July 28, 2009, 05:17:54 PM

ok so i just been to my local powerflow dealer and he recommended a competley new system and reducing it down from 2.25 to 2 " bore , i think this is a bit over kill isn't it could the silencer just be changed, is my local dealer just trying to have me on should i go and try another dealer??

hayesey · July 28, 2009, 05:23:15 PM

should just be able to change a silencer or add another silencer.

scotsjohn · July 28, 2009, 05:28:45 PM

Obviously the guy will want to make a sale, but he should be able to do a box with a 50mm exit for quite a lot less than a full system.

dub-disaster · July 28, 2009, 05:36:44 PM

yea i thought that but my local dealer (performance 3000 in yeovil) have a reputation for being expensive as hell and trying to sell people more than they need, but the other dealer said he would be able to put in an extra silencer or change the one ive got on at the moment as long as theres enough space, the question i have is will this result in any powerloss like now (running 150bhp ish) or in the future when i intented on running 180 bhp ish becuase obviously i dont want to have to keep altering the exhaust system!
What exhaust systems are other people running like what bore are they? are they noisey on the motorway ? what make are they ?

Dan · July 28, 2009, 05:53:02 PM

I think it's a problem with powerflow. In my experience they are loud, possibly due to packing, silencer size or a combination of both. If it was me I'd go somewhere else.

You should be able to get a 2.25" system which isn't too loud. Obviously it will never be really quiet.

dub-disaster · July 28, 2009, 06:11:49 PM

ok is this a general opinion has any one else got a powerflow ?? if not powerflow who is best for daily driveing but still not losing any power ppp? supersprint i hear alot on g60's r they any good? do miltek do a system ?

SteG40 · July 28, 2009, 06:17:46 PM

Mine had a powerflow exhaust on when I first got it and it was like yours, very loud worst on Motorways. I changed it to a PSD system which is alot better I can now have a conversation in the car on the motorway. I think PPP ones are pretty much the same so there probably the best to get.