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Direct center tube #1660594
25/09/2022 12:05
25/09/2022 12:05
Joined: May 2018
Posts: 932
born in Italy I live in German...
carmine Offline OP
club member 1915
carmine  Offline OP
club member 1915
Enjoying the ride

Joined: May 2018
Posts: 932
born in Italy I live in German...
Hello.

The idea of buying a direct center tube, buzzes in my head all the time, but I'm not sure it would bring me more sound.
Does anyone have this confuguration in the coupe of him and could you tell me if it's worth it?
my current configuration is:
Downpipe 70mm.
Catalyst 200 cells.
Catalyst modification: inlet 70mm, outlet 60mm.
Ragazzon center pipe with silencer shortbox.
Ragazzon final with double barrel.

I would like to replace the central unit with the direct pipe without silencer, always made by guys.

All advice is welcome.

Thank you.

Last edited by carmine; 25/09/2022 12:06.
Re: Direct center tube [Re: carmine] #1660596
25/09/2022 12:20
25/09/2022 12:20

M
mooney
Unregistered
mooney
Unregistered
M



hi, so my setup is a 3 inch system all the way to the back into what i think is a toyosports or scopion backbox. NO CAT.
tho...it could be 3.5 inch from the turbo back tbh. it looks a little fat to be 3 inch in my opinion. sound svery smooth and refined. pops and bangs and flames naturally. i think theres a small resonator in my system tho.
what are you trying to do? get alot more sound?

Re: Direct center tube [Re: carmine] #1660597
25/09/2022 12:20
25/09/2022 12:20

M
mooney
Unregistered
mooney
Unregistered
M



my turbo is a stage 3 hybrid and im running 340bhp with 303 torque

Re: Direct center tube [Re: carmine] #1660611
25/09/2022 15:28
25/09/2022 15:28
Joined: May 2018
Posts: 932
born in Italy I live in German...
carmine Offline OP
club member 1915
carmine  Offline OP
club member 1915
Enjoying the ride

Joined: May 2018
Posts: 932
born in Italy I live in German...
yes, i'm trying to get more sound but i don't want to replace the terminal, i had thought about replacing the central but i don't know if it would have made a difference.

Re: Direct center tube [Re: carmine] #1660615
25/09/2022 16:11
25/09/2022 16:11

M
mooney
Unregistered
mooney
Unregistered
M



not sure what you mean by terminal, but the bigger and more free flowing - the louder it should be in theory, certainly get alot of turbo whistle, mine sounds just like those screaming old group b audi rally cars from days of old.
yes resonators make a differencebut how much i dont know, but i think the cat converter delete really gives the 5 cylinder a MUCH MORE HEAVY AND THROBBING note sort of like you can feel it like a heart beat - thats the best way i can describe it pal.
passed my mot without it aswell which was naughty haha

Re: Direct center tube [Re: carmine] #1660616
25/09/2022 16:11
25/09/2022 16:11

M
mooney
Unregistered
mooney
Unregistered
M



i presume you ment turbo...not terminal...

Re: Direct center tube [Re: carmine] #1660617
25/09/2022 16:13
25/09/2022 16:13

M
mooney
Unregistered
mooney
Unregistered
M



the stock t28 you have to keep the cat on unless you get uprated 360deg thrust bearings, at that stage you may aswell go for a different one tho.
my advice in this case is remove any silcencers etc and have a bigger bore pipe from the cat back, 3 or 3.5 inch if possible.

Re: Direct center tube [Re: carmine] #1660618
25/09/2022 16:15
25/09/2022 16:15

M
mooney
Unregistered
mooney
Unregistered
M



trust me, i killed 3 standard t28 turbos on my first coupe. they dont like decats, and they dont like running without any sort of recirc or twin piston atmospheric bov installed.
it kills the turbo seals.

Re: Direct center tube [Re: carmine] #1660625
25/09/2022 19:33
25/09/2022 19:33
Joined: May 2018
Posts: 932
born in Italy I live in German...
carmine Offline OP
club member 1915
carmine  Offline OP
club member 1915
Enjoying the ride

Joined: May 2018
Posts: 932
born in Italy I live in German...
no by terminal I mean the last box.
I would like to change the central unit with one without a silencer, but I don't know if it's really worth it when it comes to sound. here it is very heavy in terms of homologation / mot / number check.etc etc.
i had a decat but converted it to a 200 cell catalyst. yes i still have an original turbo but it was overhauled a few years ago but i couldn't find out if it has 360 degree bearings.

Attached Files
Re: Direct center tube [Re: carmine] #1660626
25/09/2022 20:10
25/09/2022 20:10

M
mooney
Unregistered
mooney
Unregistered
M



i see, just get a stainless steel pipe welded in place that has no silencer, not sure itll make much difference tho, the cost may outweigh the end result and dissappoint you.
not much you can do for loudness unless you get an open wastegate/screamer pipe welded to your manifold, thats a real pain in the arse.
unless you want to bodge it and just run short stubby a bit of pipe straight off the turbo aimed down to the ground. ive done that before. that was ear bleedingly loud. even short trips in it were unbearable.

Re: Direct center tube [Re: carmine] #1660633
25/09/2022 22:22
25/09/2022 22:22
Joined: May 2018
Posts: 932
born in Italy I live in German...
carmine Offline OP
club member 1915
carmine  Offline OP
club member 1915
Enjoying the ride

Joined: May 2018
Posts: 932
born in Italy I live in German...
i understand, i guess for this reason i waited so long before buying it, it wouldn't be worth it just to get maybe 10% more sound. do you have any advice on how to get more sound with the current setup? I have to change a lot. thank you

Re: Direct center tube [Re: carmine] #1660634
26/09/2022 05:17
26/09/2022 05:17
Joined: Jul 2007
Posts: 626
Bulgaria
french_coupe Offline
Club member 773
french_coupe  Offline
Club member 773
Enjoying the ride

Joined: Jul 2007
Posts: 626
Bulgaria
I have 2 coupes. One has 2 x silencers and the other only 1 x silencer.
The photos above are the same as I have with 1 x silencer at the back of the car.
There is really not a lot of difference between the 2 cars.
The 1 x silencer car is a little louder but not so much. It does sometimes set of other car alarms though so the frequency must be different.
Both cars have a 200 cell catalyst.
Hope this helps.


lost in space
Re: Direct center tube [Re: carmine] #1660635
26/09/2022 07:24
26/09/2022 07:24

M
mooney
Unregistered
mooney
Unregistered
M



peronally. id change the rear box for a big bore cannon style one. that made my catted coupe quite loud. and go with the center non baffled pipe. i had a 5.4 inch supra style can on my old 20vt. bloody huge but did the job. it was made by turbo revs

Re: Direct center tube [Re: carmine] #1660692
27/09/2022 20:42
27/09/2022 20:42
Joined: May 2018
Posts: 932
born in Italy I live in German...
carmine Offline OP
club member 1915
carmine  Offline OP
club member 1915
Enjoying the ride

Joined: May 2018
Posts: 932
born in Italy I live in German...
thanks for the replies.

French_coupe I wanted to ask you,
since you have the same configuration as me, what percentage of sound would you give respect to the coupe with 2 silencers?
how does it sound compared to the'ro?
is it darker?

thank you.

Re: Direct center tube [Re: carmine] #1660699
28/09/2022 05:38
28/09/2022 05:38
Joined: Jul 2007
Posts: 626
Bulgaria
french_coupe Offline
Club member 773
french_coupe  Offline
Club member 773
Enjoying the ride

Joined: Jul 2007
Posts: 626
Bulgaria
There is only a very small difference in sound. The one with a single silencer is slightly louder but not much.
The sound is deeper though. I think this is why other car alarms sometimes go off.
I cannot do a video comparison for you as I am doing some refurbishment work on one car right now.


lost in space

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