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-   -   Funny shaped exhausts tips. (https://www.scoobynet.com/non-scooby-related-4/888884-funny-shaped-exhausts-tips.html)

ALi-B 17 May 2011 04:36 PM


Originally Posted by Trout (Post 10043948)
You have lost me there. A rear mounted flat engine has exhaust ports on both sides - so why have extra piping to bring the exhaust tips to the centre?


Hack-chewally with regrads to 911s and Beetles and such like (;) ), its quite common for the rear silencer to extend across the whole rear width of the vehicle behind the bumper, therefore the tail pipe can exit whereever it likes with very little effort in pipework.

Although some aftermarket systems try to squeeze the main silencers alongside the engine with the cats (if fitted). Looks pretty with all the snaking pipework, but I'm unsure of the effectiveness.

tony de wonderful 17 May 2011 04:46 PM


Originally Posted by ALi-B (Post 10044040)
Hack-chewally with regrads to 911s and Beetles and such like (;) ), its quite common for the rear silencer to extend across the whole rear width of the vehicle behind the bumper, therefore the tail pipe can exit whereever it likes with very little effort in pipework.

Although some aftermarket systems try to squeeze the main silencers alongside the engine with the cats (if fitted). Looks pretty with all the snaking pipework, but I'm unsure of the effectiveness.

You may want to join up the two sides of a V or flat engines exhausts for tuning purposes also i.e scavenging.

ALi-B 17 May 2011 05:04 PM

Bit debatable that; Scavenging by joining cylinder banks only works to any real effect on certain Vee configuartions based on their fireing order. Dual plane V8s for example benefit highly due to the uneven exhaust pulses, but not single plane V8s. Sure, join all four downpipes into a collector or a tuned length 4-2-1 as per a inline 4 pot, but anything further is just engineering asthetics to make it look pretty. (IMO ;) ).

Same with v12s...there is little point in joining either bank, as like single plane V8s, they have even fire pulses. Best treat them as two seperate inline 6 pots.

In fact, get it wrong and your could get the reverse...in some cases its possible to design a system as such to recirculate the exhaust gases back into the cylinder head to act as a crude form of EGR. Lean burn engines in the 70's and 80's were known to do this to avoid pinking.

tony de wonderful 17 May 2011 05:27 PM


Originally Posted by ALi-B (Post 10044095)
Bit debatable that; Scavenging by joining cylinder banks only works to any real effect on certain Vee configuartions based on their fireing order. Dual plane V8s for example benefit highly due to the uneven exhaust pulses, but not single plane V8s. Sure, join all four downpipes into a collector or a tuned length 4-2-1 as per a inline 4 pot, but anything further is just engineering asthetics to make it look pretty. (IMO ;) ).

Same with v12s...there is little point in joining either bank, as like single plane V8s, they have even fire pulses. Best treat them as two seperate inline 6 pots.

In fact, get it wrong and your could get the reverse...in some cases its possible to design a system as such to recirculate the exhaust gases back into the cylinder head to act as a crude form of EGR. Lean burn engines in the 70's and 80's were known to do this to avoid pinking.

I see your point, here are the 180 deg headers for the dual plane GT40 motor. Obvioudsly hard to fit this on a normal car but some cars run a 4 into 1 or 4-2-1 with a balancer between both sides.

http://home.comcast.net/%7Elemanswin.../Mar16_013.jpg

dpb 17 May 2011 05:45 PM

Not you i hope Alloy :Suspiciou

http://www2.b3ta.com/images/tailpipe.jpg






Some really daft sportscar exhaust , this time in the hands of a 'Keith" :thumb:


http://youtu.be/mia69PdZIX0

Jaybird-UK 17 May 2011 05:48 PM

They look fine on the right car...

http://farm4.static.flickr.com/3397/...5ed3326276.jpg
http://www.dragtimes.com/albums/Palm...view.sized.jpg
http://cdn.actionrecon.com/wp-conten...er-623x389.jpg

Trout 17 May 2011 06:02 PM

Hate Veyron, love this...

http://www.sportsclb.com/wp-content/...ni_zonda_2.jpg


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