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-   -   my exhaust idea, in put required please :-) (https://forum.a8parts.co.uk/showthread.php?t=3775)

Night Train 3rd December 2011 12:54 PM

Quote:

Originally Posted by HPsauce (Post 29784)
was that the one with a huge 12-seat dining table instead of a bonnet?
Wonderful style statement. +++
http://farm4.static.flickr.com/3339/...3e197fe251.jpg



Yes HPSauce.....

That very model and year too :)

Much more lurid paint though, my friends referred to it as 'The Jolly Green Giant' :)

Bench seats, column change..... what the youth of today are missing (unless they have a Huuuge estate car) ;) (conspiratorial wink)

Iyole 3rd December 2011 02:08 PM

Similar concept ro the Xhaust I have.

The De-Cat and X Pipe is a must...

I have 2 pipes front to back with different Silencer set-up and a Valve on the Loud Pipe which is controlled by a button in the centre consol.

I like the QTP3 Valves..... Tx for the Link....

I do feel the Sleeper Xhaust could create Fumes that might be unpleasent if sitting in Traffic.... Mebe not but I would try move the outlet as far back as posssible.

It's a reasonably simple mod that brings out the true sound of the Big 8.... but one must have the option to Get off the Track and back into Suburbia... when you want to just trundle around in a civilized manner :rolleyes:

Be keen to see the result on this one.... :)

Night Train 3rd December 2011 09:43 PM

I don't reckon that you'd need more than 2 valves Guy, the gas, like water will take the easiest (less restrictive) route out, all I'd do is join in your street stealth system into your quads, one out of each side of the 'stealth' to its corresponding side on the quads....

Are you going to be fitting 'cherry bombs' on the 'strip' mode to give a modicum of damping of sound through the quads?

The reason I say this, is that my Harley Davidson is on straight throughs (no baffles) and if I'm riding it for more than 20 minutes, I have to wear ear plugs, I've tried the iPod route, but even at full volume at 60-70mph I can't hear Motorhead at full blast inside the crash helmet! (just to give an idea of noise levels)
Sounds bl00dy wonderful though :)

daviesbike 5th December 2011 12:49 PM

it is already running with a box on each side of the quads and also a twin set of boxes further down by the X pipe so that should not be a problem, i did think of getting a custom box made to go where the cats were to baffle every noise known to man but no after market boxes iv ever heard are as quiet as standard so a few mods to the back box and centre box and throw some valves in there should be interesting any way

daviesbike 5th December 2011 12:58 PM

something like this you mean ?

http://i866.photobucket.com/albums/a...ke/myidea2.jpg

again no picasso but you get the idea

Architex_mA8tey 5th December 2011 01:10 PM

That looks like Thunderbird 3 !! :D

Night Train 5th December 2011 03:36 PM

I would have thought that arrangement would do the trick nicely Guy :)

A8 Doc 6th December 2011 07:32 AM

http://www.ecrater.co.uk/p/12592623/...rol-valve-51mm

That might help you. Uses a throttle cable arrangement but easy enough to motor up. Or alternatively use some older throttle bodys which are electric and just pulse the solenoid at different intervals.

I would go simular arrangement to the D3 S8. Keep your quad look, but then use the outer pipes for quiet, and the inner for loud :D

Simpler to do as same exhaust, then you just use a valve to direct one through the silencers, or the others through the straight through....


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