Siamesed headers?
06-20-2005, 08:51 PM
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Car: 86 Camaro Iroc-Z
Engine: 305ci TPI
Transmission: 700R4
Siamesed headers?
has anyone ever siamesed thier headers in any way, or do headers ever have any sort of plenum that could be like the reverse of the intake plenum?? this is just me with too much thinking time, but hey maybe thats a good thing.
06-20-2005, 10:29 PM
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Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Well it would definitely make changing spark plugs even worse. 
Not to mention the added area for metal to heat soak the engine bay. Wouldn't siamesing be one or two steps back towards the old factory log style manifold?
Most I've seen done is stepped primaries with a central spread collector area.
NOTE: Those are HEADMAN HUSTLER HEADERS # 65180 off an old ebay auction, so you better save the pics if you like them. They'll only be there for another 60 days or so.
Not to mention the added area for metal to heat soak the engine bay. Wouldn't siamesing be one or two steps back towards the old factory log style manifold?Most I've seen done is stepped primaries with a central spread collector area.
NOTE: Those are HEADMAN HUSTLER HEADERS # 65180 off an old ebay auction, so you better save the pics if you like them. They'll only be there for another 60 days or so.
06-21-2005, 08:11 PM
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Car: one with wheels
Engine: one with pistons
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Tri-y headers. Somewhat the same principle as the intake, reversed. Actually, headers in general are the same reversed. The siamesing does not go all the way to the head ports. The headers come out and all merge into the collector (plenum equivalent)... but the tri-y's are what I think you were talking about... unless you meant siamesing just outside of the exhaust port... which really wouldn't be 'just like the intake' and really wouldn't make any sense at all.
06-23-2005, 10:09 PM
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Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Originally posted by BigWhiteGTP
Those headers look badass! Are they for 350's?
Those headers look badass! Are they for 350's?
06-23-2005, 10:14 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Originally posted by Black Bomber
Tri-y headers.
Tri-y headers.
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