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st184 sillycar
Forums Junkie

Location:
Melbourne
Registered:
June 2004

Re: extractors

Sun, 19 December 2004 22:30

Meat_rack wrote on Sun, 19 December 2004 23:35

hi guys

i have been told that the best type of extractors for road use are 4-2-1. but i have also been told that cylinder one and four must join, then two and three before all joining into one. is this true or should you follow your engines firing order?

Dude: the objective of extractors is to have pulses evenly spaced when pipes join. That means the primaries need to be joining 1+4 and 2+3 when they merge into the secondaries, because those pistons fire at even intervals from each other, i.e. one whole revolution.

Joining 1+2, 3+4 would probably make a whack off-beat exhaust note (slightly WRX-like perhaps?) but wouldn't be terribly efficient.

I hope that helps.

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Subject Poster Date

Read Message extractors Meat_rack Sun, 19 December 2004 12:35
Re: extractors st184 sillycar Sun, 19 December 2004 22:30
Re: extractors jesseT18 Sun, 19 December 2004 23:35
Re: extractors st184 sillycar Mon, 20 December 2004 01:02
Re: extractors CrUZsida Mon, 20 December 2004 03:52
Read Message Re: extractors db__ Mon, 20 December 2004 04:53
Re: extractors CrUZsida Mon, 20 December 2004 04:56
Re: extractors oldcorollas Mon, 20 December 2004 05:43
Re: extractors st184 sillycar Mon, 20 December 2004 10:17
Re: extractors riceburna73 Tue, 21 December 2004 03:22
Read Message Re: extractors st184 sillycar Tue, 21 December 2004 07:21
Re: extractors cheese_cracka Tue, 21 December 2004 10:46
Re: extractors CrUZsida Tue, 21 December 2004 11:57
Re: extractors cheese_cracka Tue, 21 December 2004 12:01
Re: extractors Meat_rack Tue, 21 December 2004 12:06
Read Message Re: extractors CrUZsida Tue, 21 December 2004 12:32
Re: extractors cheese_cracka Tue, 21 December 2004 13:16
Re: extractors oldcorollas Tue, 21 December 2004 13:22
Re: extractors Meat_rack Tue, 21 December 2004 13:23
Re: extractors Meat_rack Tue, 21 December 2004 13:29
Read Message Re: extractors oldcorollas Wed, 22 December 2004 10:33
Re: extractors Henn Wed, 22 December 2004 06:10
Re: extractors st184 sillycar Wed, 22 December 2004 07:08
Re: extractors White Rabbit Tue, 28 December 2004 06:28

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