I've put a 2.5 jetex system on my 850R. It has one silencer up front and nothing on the back. It's married to a 3" downpipe with sports cat. There's no motorway drone, and once you get up above 2000 RPM everything is good. It's just a little embarrassing around town. Between about 1300rpm and 1900rpm it becomes REALLY resonant and loud. I wondered if adding one of these at the back might help: [ATTACH=CONFIG]28312[/ATTACH]
I have the same system on mine but it had a rear box which ive removed for the time being as it sounded little more than standard with it in place untill the boost came in then it woke up abit
How long was the rear box? I got my system second hand and didn't have the back box; I need to order one, but I want to keep the genuine Volvo DTM pipes I got. [QUOTE=nottsgreent5;762896]I have the same system on mine but it had a rear box which ive removed for the time being as it sounded little more than standard with it in place untill the boost came in then it woke up abit[/QUOTE]
Sorry for the delay i can measure it for you tommorow if you like
No worry, but thanks for the offer. I had a good measure up today, going to go for an oval silencer, try and counter the roar of the 3" downpipe a little. [QUOTE=nottsgreent5;763127]Sorry for the delay i can measure it for you tommorow if you like[/QUOTE]
Mine dosent drone to bad 3" down pipe no cat and 1 silencer bloody noisey on boost though lol
Yeah there's almost no drone, just annoyingly noisy around 1300 - 2000 revs, which really is when you least want it to be noisy. It's got that nasty sound like a kev'd up 1ltr Polo. I recon chucking a back-box back on will help, I wonder if the stuffing has come out of the middle silencer Like you say, nice and noisy on boost which is good :-) [QUOTE=nottsgreent5;763143]Mine dosent drone to bad 3" down pipe no cat and 1 silencer bloody noisey on boost though lol[/QUOTE]
In my experience with barry exhausts in the past, all the really loud low RPM issues was due to it blowing slightly somewhere, When I had saxslow, we fitted a decat and eventually a backbox making it straight through and we test drove, droney as hell at low rpm but absolutely nothing when booting it. Realized the bolts had a few more thread to turn pressing the gasket in place and that sorted it right out.
I've put a back box on and it's quieter now. Still peaks around 2000rpm, but I'd say it's about right for a 3"dp and 2.5" cat back. Nevertheless, I will definitely check all the bolts. [QUOTE=bunka T5;764428]In my experience with barry exhausts in the past, all the really loud low RPM issues was due to it blowing slightly somewhere, When I had saxslow, we fitted a decat and eventually a backbox making it straight through and we test drove, droney as hell at low rpm but absolutely nothing when booting it. Realized the bolts had a few more thread to turn pressing the gasket in place and that sorted it right out.[/QUOTE]