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Location:
Adelaide
Registered:
August 2003
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4ag extractors
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Sun, 04 July 2004 15:58
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hey guys,
i was wondering what's the difference with 4-2-1 extractors designs..
like 1-4 and 2-3...and those like 1-2 and 3-4...
the 1,2,3,4 is the port which is number 1 from the left..am i right?
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: 4ag extractors
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Mon, 05 July 2004 06:26
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4-2-1 is referring to the collector
4 pipes into 2 pipes into 1 collector (more torque in this design)
4-1 means 4 pipes into 1 collector (better for top end flow = more power than torque in this design)
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Location:
Adelaide
Registered:
August 2003
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Re: 4ag extractors
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Mon, 05 July 2004 08:35
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hmm...that's not what i meant.. 
i dont know how i should describe it...ok..4 pipes connected to the exhaust port...all four of the pipes are then joined into 1 pair...then into 1 collecter...
what i was asking is...when the 4 of them are joint into 2 pipes...which number of exhaust pipe is joined into which one...
is it 1st pipe joined into 2nd pipe...and 3rd pipe with 4rd pipe?
or 1st pipe joined into 3rd pipe..and 2nd pipe joined into 4th pipe...
etc etc
does it make sense? 
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: 4ag extractors
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Mon, 05 July 2004 08:40
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| Satoshi wrote on Mon, 05 July 2004 18:35 |
hmm...that's not what i meant..
i dont know how i should describe it...ok..4 pipes connected to the exhaust port...all four of the pipes are then joined into 1 pair...then into 1 collecter...
what i was asking is...when the 4 of them are joint into 2 pipes...which number of exhaust pipe is joined into which one...
is it 1st pipe joined into 2nd pipe...and 3rd pipe with 4rd pipe?
or 1st pipe joined into 3rd pipe..and 2nd pipe joined into 4th pipe...
etc etc
does it make sense?
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yeah man i know what you mean
differs with each design
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Location:
Adelaide
Registered:
August 2003
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Re: 4ag extractors
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Mon, 05 July 2004 08:56
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what's the pro's and cons of each design?
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: 4ag extractors
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Mon, 05 July 2004 08:57
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i have no fucking idea 
teehee
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Location:
Albany WA
Registered:
October 2003
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Re: 4ag extractors
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Tue, 06 July 2004 07:30
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Speaking of 4-2-1 extractors, this is the WRONG WAY to do it on a four cylinder engine! A 4-2-1 system must have cylinders #1 & #4 joined up, and #2 & #3 joined up, then further down those two pipes join into one. This is because four cylinder engines have a 180° crank, whereas virutally all V-8's have a 90° crank (the angle between the crankpins) and so the order in which the exhaust pulses come down the pipes is different. You can tell that the engine has these incorrent type of extractor on it, as they sound a lot like they have a dead cylinder and/or like a Subaru WRX.
Courtesy of Bill Sherwood, www.billzilla.org in his "engines: Exhaust" section.
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