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Re: Replacement S1 exhaust [Re: SimonH] #436712
15/03/17 10:43 AM
15/03/17 10:43 AM
Joined: Feb 2016
Posts: 1,362
Buckinghamshire
NickCW Offline
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NickCW  Offline
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Joined: Feb 2016
Posts: 1,362
Buckinghamshire
Originally Posted By SimonH
Originally Posted By Volvos60s60


Please can SiFab advise if they have developed an exhaust


In short, no...

There are decent gains to be made from a proper exhaust manifold and system on the S1 Aero. But when I say proper, it will be north of £5-6K for an equal length ceramic coated manifold (else it will cook everything in the engine bay)and a proper mandrel bent, correct diameter full exhaust system

And then there's the fitting cost....

I did do a lot of work with simulation for some of the planned development work on the Aero GT after the 2006 Britcar 24hr race, but the owner decided to take the car elsewhere

For what its worth, we ran circa 380BHP from the 4.6 engine for the 24hr race through the standard manifolds, no cats (we didn't have to worry about emissions) and a 2 1/2 OD exhaust system. We had large(but straight through) silencers and side exit exhausts

Simon @ SiFab.co.uk


Hi Simon,

It would be great if someone did eventually produce some good manifolds for the Aero, give it some more bark..

With regards to the exhaust I have a question, I note there are 2 cats on each side before the silencer, how much do these restrict performance in your experience and would removal of one of those be the best route for performance/noise rather than removing the only exhaust box in the system (Librands)?

Thanks,
Nick


Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Replacement S1 exhaust [Re: Volvos60s60] #436818
15/03/17 07:11 PM
15/03/17 07:11 PM
Joined: Mar 2007
Posts: 1,244
Sevenoaks,Kent
Viper Offline
Sir S1'a'lot
Viper  Offline
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Posts: 1,244
Sevenoaks,Kent
Well, Like I've said before

I have the Librands system but have now omitted the running board silencers and it's still not noisy, got a nicer bark but wouldn't mind it louder.

You have to remember the CATs silence too.


Life is a bowl full of cherries....there you go wink

Re: Replacement S1 exhaust [Re: Viper] #436972
16/03/17 11:43 AM
16/03/17 11:43 AM
Joined: Feb 2016
Posts: 1,362
Buckinghamshire
NickCW Offline
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NickCW  Offline
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Buckinghamshire
Originally Posted By Viper
Well, Like I've said before

I have the Librands system but have now omitted the running board silencers and it's still not noisy, got a nicer bark but wouldn't mind it louder.

You have to remember the CATs silence too.


Does it idle any louder?
Must admit I am in two minds as to what to do, as if I remove the centre sections all that is left is the tailpipes - that's an expensive £1700 set of tailpipes laugh2


Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Replacement S1 exhaust [Re: Volvos60s60] #437193
17/03/17 08:51 AM
17/03/17 08:51 AM
Joined: Mar 2007
Posts: 1,244
Sevenoaks,Kent
Viper Offline
Sir S1'a'lot
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A little. Has more bark on start up and rev but still easy on the ear when on the motorway cruise

I had very good mobile guy come around home and take the silencers off, cut them open and bandage up the inner perforated pipe. I figured this was a good option as it was reversible.


Last edited by Viper; 17/03/17 08:53 AM.

Life is a bowl full of cherries....there you go wink

Re: Replacement S1 exhaust [Re: NickCW] #437198
17/03/17 09:03 AM
17/03/17 09:03 AM
Joined: Jul 2011
Posts: 466
west yorkshire
E
exbiker Offline
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Joined: Jul 2011
Posts: 466
west yorkshire
Hi Nickcw,
To get the tickover to be louder you would have to decrease the internal restrictions in the exhaust to such an extent that when you blip the throttle or accelerate the noise would be very loud.
As previously mentioned I removed the back boxes and that was loud enough for me, tickover was still quiet (although a little louder than stock)and it had a nice growl on acceleration.
Not an easy decision if you are wanting a louder tickover, good luck,
Ian


2017 Mercedes Benz SLC 200 AMG.
2019 Mercedes Benz GLA 200 AMG
Now Ex-Mogger!
Re: Replacement S1 exhaust [Re: Volvos60s60] #437312
17/03/17 06:38 PM
17/03/17 06:38 PM
Joined: Feb 2016
Posts: 1,362
Buckinghamshire
NickCW Offline
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NickCW  Offline
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Joined: Feb 2016
Posts: 1,362
Buckinghamshire
Thanks guys, thinking about it.. it ticks over at such low revs when warmed up (about 600 if I recall) that I wonder if the idle can be adjusted.
At about 800/900 revs (where it sits after the initial cold start settle before it fully warms up) it sounds lovely..

Last edited by NickCW; 17/03/17 06:39 PM.

Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Replacement S1 exhaust [Re: NickCW] #437362
17/03/17 10:16 PM
17/03/17 10:16 PM
Joined: Mar 2007
Posts: 1,244
Sevenoaks,Kent
Viper Offline
Sir S1'a'lot
Viper  Offline
Sir S1'a'lot
Has a lot to Say!

Joined: Mar 2007
Posts: 1,244
Sevenoaks,Kent
I think I might have done a sound bite here somewhere but never quite sounds the same when recorded on the phone


Life is a bowl full of cherries....there you go wink

Re: Replacement S1 exhaust [Re: Volvos60s60] #437554
18/03/17 07:46 PM
18/03/17 07:46 PM
Joined: Apr 2014
Posts: 326
M
Mark jackson Offline
Learner Plates Off!
Mark jackson  Offline
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M

Joined: Apr 2014
Posts: 326
I have an infinity rear system on mine that deletes all the rear silencers and just uses the Cats I believe. Silent on tick over and loud enough when driving, certainly hear it bouncing off buildings etc. I also thought louder would be good, but a friend owns a TVR with typical loud pipes......he used ear protectors when driving as it is too loud. So carefully what you ask for.

More BHP mind......but £5k might be a tad too much

Last edited by Mark jackson; 18/03/17 07:46 PM.
Re: Replacement S1 exhaust [Re: Volvos60s60] #437613
19/03/17 12:52 AM
19/03/17 12:52 AM
Joined: Jul 2016
Posts: 125
Essex/Herts border
Volvos60s60 Offline OP
L - Learner Plates On
Volvos60s60  Offline OP
L - Learner Plates On

Joined: Jul 2016
Posts: 125
Essex/Herts border
Well, I have decided on a twin pipe side exit job. All booked in to have it done. Looking forward to a car that no longer sounds, er, mild. 😀

Re: Replacement S1 exhaust [Re: Volvos60s60] #437666
19/03/17 09:28 AM
19/03/17 09:28 AM
Joined: Mar 2016
Posts: 838
Upminster, Essex
simonjrw Offline
Talk Morgan Regular
simonjrw  Offline
Talk Morgan Regular

Joined: Mar 2016
Posts: 838
Upminster, Essex
H&S?
My TR6 (v8) is booked in there next month....not cheap!
Simon


Series 1 Aero 8
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