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