chrisp

my00 ppp centre is just a resonator box i.e. no cat

richir rich

ive a decat centre + down pipe along with prodrive back box, its deep ,but not to loud, its on a k/plate wrx, its perfect for a family man with children, loads of power but not over noised, the car is for sale at 4000 pounds, call 07906852429 or email me at richie307@hotmail.com to hear sound of exorst, ta richie rich...

Ray_li

lol. cheek

micared

Ray, I had hangups about too much noise on mine, same year classic as yours. It has the centre cat still in , but has Janspeed/Scoobysport uppipe and downpipe, sti b/box and ported headers. The uppipe and d/pipe are wrapped, and the car is quieter than standard.

Ray_li

tell me more about the wrap.
Mmmmm dont think wrapping a polished stainless steel BB will work.

micared

What d'you want to know?

wrxmania

Sound proofing like Dynamat worked for me. I also done the inside of the boot etc and the boot floor with Carpet Underlay

Brian

jaycee

Ray stop being a big girl!
Drive round with your windows down for a few days and when you wind them back up it'll seem quieter!

Scratch

iTrader: (1)

Was running full decat as :

H&S open neck decat d/pipe with splitter mod
P1 decat centre section (same as PPP/Sti V)
PPP Back box

Found this to be noisy when giving it some welly, but really quiet when cruising. Also had just the right amount of burble when driving about with the family full

Decat d/pipe only made the rest slightly louder, but did also deepen the note quite a bit which was rather a (pleasant) surprise

Got the std cat downpipe back on ATM and it sounds all rather quiet by comparison now.

jasonius

iTrader: (1)

Soundproofing = a lot of weight..!

Infact, performance wise you'd be better of with the cat back on than to add soundproofing.

Jason

wrxmania

Only if hammering the hell out of it

Broxi

iTrader: (11)

I have fitted a Full Scorpion, removing both cats on my 93 RA and i think it sounds awsome, i actually want it louder and want to change the downpipe for an open mouth one.

It pops and bangs a treat, again I love it and the Neighbours hate it, one in particular, who use to make it awkward for me to get in and out of my drive, soon parked else where when i deliberatly gave him some extra noise when i was reversing my scooby right up to the side of his Jag.

Love the noise would not want it any Quieter.

PhilA

Not too loud, wouldn't want it quieter.

pbee

newage with decat down and centre 2nd centre has resonator. not to loud, and rasps nicely on wot.

tmo

loud .... yes

Bothered about it ........ no

Wife and daughter love the sound of it.

If you've got a flat 4 .... flaunt it

Magnex twin dump de-cat D/P, Tsl de-cat center, TSL Group N back box with 4" out

V LTD sti type RA

my decat sounds amazing with flames and popping to match!

Ray_li

I do love the sound and noise is growing on me since i started this thread but im still finding to loud on the Mways

redeye

dont worry about it being too loud,just sit back and enjoy it.

john banks

I have Revolution 3", quietened by exhaust manifold, underlay in boot and a centre section resonator. Still way too loud IMHO. Embarrassing really. But what can I get that flows the air and is quieter?

Ray_li

what underlay are you using?

I looked at the stuff made for cars but way to expensive and heavy.
Also looked at carpet/wooden floor underlay but didnt know which kind. found the thick green slabs but not to keen on them.

Ray

big MO

what's your bb ray? I used to have a firestorm (103db), but changed it to the tornado(also 103db) which has the bung for quieter journeys (89db)

Ray_li

gonna sound like a big girl now. its a scoobysport and decat middle section

Peanuts

iTrader: (15)

H&S downpipe, magnex (resonated) centre and magnex 3.5".
yes its too loud.
I have bought and am swapping to a revolution 3" system tomorrow morning.
I also have tubular headers going on in the near future.

I intend to whack a resonator on the centre section.
it is embarressing and cringeworthy when I leave for work in the mornings (6am) and I am concerned about the neighbours.

simple point of physics...
if your noisey and making flames then your wasting available energy.

Ray_li

that nice of you but I dont give a fock about my neighbours.

love the sound of the flat 4 from outside

john banks

Ray, it was fibrous stuff that was under the carpets I had fitted in my house

Keef69

Had the same problem, had a Scoobysport back box and added a non resonated de-cat centre pipe. Was annoyingly loud on the motorway, droning away. Changed the centre for a resonated de-cat and it's back to normal now, sounds like a Scoob but doesn't ruin the classical music!

lordharding

iTrader: (1)

I love the sound so much in the Green Wagon that i even fold the back seats down so i can hear it even more

but im warped !!

Who else wants to get 500 scoobys into a field (NBO ) so they can here my exhaust !!


One good thing i never have any passengers to slow me down

Wonder why ?

RaymondH

I've had 7 different boxes/systems trying to find something that sounded good outside but didn't drone inside and now, at last, I've cracked it I have a Scoobysport (H&S) downpipe which is wrapped with some spare exhaust wrap and a Magnex resonated centre that I used with the original Scoobysport (H&S again) box but I found that a bit too loud (droning) so sold that box and got a Prodrive one which was too quiet then a WR Sport oval which is supposed to be the same as the Prodrive with a different tail pipe and that sounded great (it was second hand so I don't know how many miles it had done) but I hated the oval so off it came to be replaced with an Afterburner that I bought in a moment of madness at NBO1. The Afterburner was LOUD and you could feel the vibrations from it through the floor...That was replaced with an H&S box with 4" tailpipe and which was, of course, too loud (some people never learn ) so next along was an STi box which was too quiet and I also missed the big Jap style tail pipe of the Afterburner so I then got a new Scorpion system complete with unresonated centre which was fine for a while but I still got a drone at 2500ish revs which drove me daft. I replaced the centre with the Magnex resonated one and that made an improvement (incidentally, that centre has been wrapped with ladder tape which is used for insulating boilers etc and that helps a bit too). To get to the point (at last) somewhere along the line I had also invested in a full Noise Killer kit which I was disappointed in because it didn't make a lot of difference and the bits under the carpet made the carpets a loose fit so I had eventually taken them back out and they were lying in the garage doing nowt. I cut these up and stuck them all over the boot floor , in the inner wings, spare wheel well, everywhere without making much difference BUT, after I removed the back seat (MY98 saloon) and filled in the spaces between the Noise Killer in the boot and the bit under the seat AND PUT SOME BEHIND THE CARPET ON THE VERTICAL PANEL THAT COMES UP FROM THE FLOOR TO THE SEAT BASE the improvement was immediately noticeable and I now have what I was looking for So, I now have a H&S (wrapped) downpipe, Magnex (wrapped) resonated centre and Scorpion back box with 4" Jap style tail pipe and no droning I think that the key part was putting Noise Killer in that vertical panel because it is thin metal and the noise of the exhaust must bounce back off it. It certainly worked for me so if you give it a go I'd be interested to know if it helps you too

austen_wrx

Jesus you wasted some cash during that!!! Glad you're happy now


Ray_li, check one of your gaskets aren't blowing. The decat on my last bugeye was fine to start with, but it seemed to get louder, until towards the end of owning it, it was getting really annoying on motorway. When i removed the heat shield to put the standard DP back on before getting my new car, i noticed that one of the bolts of the back of the tubo/DP had dropprd out and the other 4 bolts were loose, an dthere was about a 3-5mm gap between!!! No wonder it was fecking loud!!!

Ray_li

Austen_wrx - i'll check over the weekend.

RaymondH - gonna give that a try with the installation under the seat and the vertical area from the floor to the rear seats.