V6 Chevy 90 degree engines

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==Intake manifolds==
 
==Intake manifolds==
 
There is only one Q-jet intake available and it was only made for two years, 1985-'86. It's a heavy cast iron dual plane piece, has EGR and a heat crossover. It works OK for mild builds.
 
There is only one Q-jet intake available and it was only made for two years, 1985-'86. It's a heavy cast iron dual plane piece, has EGR and a heat crossover. It works OK for mild builds.
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[[File:OEM 4.3 L V6 Q-jet intake 1986-back.jpg|thumb|left|OEM 4.3 L V6 Q-jet intake 1986-back]]
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There are several marine intakes, both for the Rochester 2G-type 2-barrel and the Q-jet and Carter squarebore (uses an adaptor) 4-barrel, all cast iron. In fact the only aluminum intake for the V6 Chevy 90º is a 2-barrel single plane(!) piece that was used for several years on the 200 and 229 cid engines. Not a performance-oriented part, it has a bolt pattern for the Dualjet (basically the front half of a Q-jet), which means no other carbs will fit it and there are no adaptors, either.
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===Marine intakes===
 
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There are several marine intakes, both for the Rochester 2G-type 2-barrel and the Q-jet spreadbore and Carter squarebore (uses an adaptor) 4-barrel carbs, all cast iron. In fact the only aluminum intake for the V6 Chevy 90º is a 2-barrel single plane(!) piece that was used for several years on the 200 and 229 cid engines. Not a performance-oriented part, it has a bolt pattern for the Dualjet (basically the front half of a Q-jet), which means no other carbs will fit it and there are no adaptors, either.
  
  
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[[File:Marine 4.3 L V6 1995-back non Vortec intake.jpg|thumb|left|1995-back non Vortec intake]]
 
[[File:'96-up 4.3L MARINE VORTEC INTAKE OPEN PLENUM, CAST IRON.jpg|thumb|300px|right|4.3L marine Q-jet cast iron single plane intake for the '96-up Vortec heads]]
 
[[File:'96-up 4.3L MARINE VORTEC INTAKE OPEN PLENUM, CAST IRON.jpg|thumb|300px|right|4.3L marine Q-jet cast iron single plane intake for the '96-up Vortec heads]]
 
[[File:4.3 L V6 MerCruiser Alpha One Generation Two Vortec Intake w- 2 barrel carb c-n GM 12552422.jpg|thumb|left|350px|1996-up 4.3 L V6 MerCruiser Vortec dual plane intake for 2 barrel carb, c/n GM 12552422]]
 
[[File:4.3 L V6 MerCruiser Alpha One Generation Two Vortec Intake w- 2 barrel carb c-n GM 12552422.jpg|thumb|left|350px|1996-up 4.3 L V6 MerCruiser Vortec dual plane intake for 2 barrel carb, c/n GM 12552422]]

Revision as of 03:48, 16 March 2012

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