➜ advanced search
Add a more detailed reply Start a new thread in the Exhausts forum
Home -> Forums -> Exhausts -> straight threw on supercharge

displaying posts 1 to 20 of 20

Author Subject: straight threw on supercharge
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #1
Hi guys, I'm running decat with magnex centre section and rear box, I'm think of removing centre box and go straight threw to back box, would there be any gain?. I no it will deff be louder Razz
Posted 23rd Jan 2014 at 00:07
Profile
jamiek_uk2000

Seasoned Pro

Location: Llanelli

Registered: 18 Apr 2009

Posts: 1,925

Status: Offline
Post #2
A lot of noise, back pressure isn't important on forced induction. Depends on the bore of the system really.

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"
Posted 23rd Jan 2014 at 00:08
Profile
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #3
I have a straight through centre section and I think it's great. Yes

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 23rd Jan 2014 at 00:16
Profile
jamiek_uk2000

Seasoned Pro

Location: Llanelli

Registered: 18 Apr 2009

Posts: 1,925

Status: Offline
Post #4
What bore is yours Stan 2.5?

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"
Posted 23rd Jan 2014 at 00:19
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #5
Would I notice it pull better ?, I believe got 2.25 bore magnex decat and rear box
Posted 23rd Jan 2014 at 01:22
Profile
rallyestyle

Seasoned Pro

Location: London

Registered: 23 Jul 2003

Posts: 14,991

Status: Offline
Post #6
To get any real gain out of it you would need to have it custom mapped i would think. I have mine setup as similar as possible to the car that the map was created on.

________________________________________

Just Drive It
Posted 23rd Jan 2014 at 07:58
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #7
Yea I proberly will get it custom mapped at some point, just thought removing middle box it would free it up a bit, might notice a little gain?
Posted 23rd Jan 2014 at 10:19
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #8
Can't decide if get race tube mmmmmm
Posted 23rd Jan 2014 at 20:28
Profile
superchargedblack1997gti6

Seasoned Pro

Location: guildford

Registered: 15 Aug 2009

Posts: 2,376

Status: Offline
Post #9
I wouldn't do it mate trust me it'll be too loud. superchargers do need back pressure remember a turbo is a silencer all of its own in the exhaust. all you can hear on supercharged cars is pressurised air going past the exhaust valves. especially if you go highboost if you still are?

________________________________________

Super high boost Completed, destroyer of gearboxes and 160mph club
Posted 23rd Jan 2014 at 20:49
Profile
RetroPug

Seasoned Pro

Location: Leicestershire

Registered: 15 Jan 2013

Posts: 2,473

Status: Offline
Post #10
IMO achieving a nice tone is FAR better than having a high level of noise!

________________________________________

61k miles Ph.1 Diablo '6 Project Thread
Posted 23rd Jan 2014 at 21:16
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #11
Wasent so much for noise, just thought might of freed it up a bit, make it pull slighter better


Stan do you notice any difference when you put the middle box back on?
Posted 23rd Jan 2014 at 22:08
Profile
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #12
jamiek_uk2000 wrote:
What bore is yours Stan 2.5?


Yep. Yes

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 23rd Jan 2014 at 22:26
Profile
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #13
pete-gti wrote:
Wasent so much for noise, just thought might of freed it up a bit, make it pull slighter better


Stan do you notice any difference when you put the middle box back on?


Yeah, it doesn't quite have the same top end pull with a centre box. Wink

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 23rd Jan 2014 at 22:27
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #14
So with centre box removed you saying pulls bit better top end? Slightly bit more torque


Where did you get your centre pipe from?
Posted 23rd Jan 2014 at 22:42
Profile
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #15
A slight loss in the mid range with no centre box, better pull up top. Yes

My centre pipe was bespokely made by Zero Exhausts in Ashford, Kent. It cost me £100.

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 24th Jan 2014 at 10:15
Profile
pugheaven

Seasoned Pro

Location: Fareham

Registered: 17 Dec 2006

Posts: 4,602

Status: Offline
Post #16
If your planning in doing track days don't bother removing your centre box
Posted 24th Jan 2014 at 10:46
Profile
eddy_gti6

Seasoned Pro

Location: Durham

Registered: 20 Oct 2008

Posts: 8,716

Status: Offline
Post #17
pugheaven wrote:
If your planning in doing track days don't bother removing your centre box


I agree here. My old 6 was pretty much standard apart from BMC CDA, magnex decat, 2.25" stainless middle section and scorpion back box what got sound tested at croft 98.8db so I am guessing with a charger you can look to have that increased. A lot of tracks have noise limets of 105db.
I must say tho I loved the sound it made Love

________________________________________


Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =
Posted 24th Jan 2014 at 11:30
Profile
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #18
I could never run the straight through on track, it registered 132dB. Laugh

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 24th Jan 2014 at 14:35
Profile
russbez

Seasoned Pro

Location: Inverness-Shire

Registered: 19 Dec 2005

Posts: 7,459

Status: Offline
Post #19
friend sent me this last night Whistle



mine is high boost with a restrictive 2" scorpion system Sad
dread to think how loud 132dB is!!

________________________________________

TEAM HIGH BOOST SUPERCHARGED RALLYE

My Rallye project thread
Posted 24th Jan 2014 at 15:18
Profile
pete-gti

Seasoned Pro

Location: Kent

Registered: 15 Feb 2009

Posts: 1,297

Status: Offline
Post #20
Catch 22 ain't it, it has its lows and highs, mmmmm
Posted 24th Jan 2014 at 15:18
Profile
Home -> Forums -> Exhausts -> straight threw on supercharge

All times are GMT. The time is now 15:23

The Peugeot GTi-6 & Rallye Owners Club - ©2025 all rights reserved.

Please Note: The views and opinions found herein are those of individuals, and not of The Peugeot 306 GTi-6 & Rallye Owners Club or any individuals involved.
No responsibility is taken or assumed for any comments or statements made on, or in relation to, this website. Please see our updated privacy policy.