V6 Chevy 90 degree engines
(→Intake manifolds) |
(→Intake manifolds: add images, minor clean up) |
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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 is found in light duty pickups/vans | + | ===Aftermarket intakes=== |
| + | Edelbrock makes two square bore four barrel intakes for the Chevy V6 90 degree engines: | ||
| + | *p/n 2114 for vortec heads | ||
| + | *p/n 2111 for non vortec heads | ||
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| + | GM makes several intakes as well: | ||
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| + | [[File:Gm highriseV6.jpg]] | ||
| + | *p/n 10134390 (above) is a square bore (although has both bolt patterns), high rise, has no EGR, made for use with a 390 CFM Holley although other carbs will work. Suitable for high performance street/strip use. | ||
| + | *p/n 10051125 is the base for the raised runner cross ram intake, race only unless the engine is very healthy (below left). | ||
| + | **p/n 10051126 is the 'upper cover' for the base. It will mount a squarebore or 4500 carb; carb flange is undrilled (below center). | ||
| + | **p/n 10134327 is an airflow deflector used with the raised runner cross ram intake (below right). | ||
| + | |||
| + | [[File:Raised Runner Intake Manifold Base.jpg]][[File:Raised Runner Intake Manifold Cove.jpg]][[File:Manifold Deflector.jpg]] | ||
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| + | ===OEM=== | ||
| + | There is only one production factory Q-jet intake available and it was only made for two years, 1985-'86. It is found in light duty pickups/vans. It's a heavy cast iron dual plane piece, has EGR and a heat crossover. It works OK for mild builds. | ||
[[File:OEM 4.3 L V6 Q-jet intake 1986-back.jpg|thumb|left|OEM 4.3 L V6 Q-jet intake 1986-back]] | [[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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| − | Passenger cars (B and G- | + | The 1985 Astro van had this intake; passenger cars came standard with TBI fuel injection). Passenger cars (B- and G-body) as well as trucks/vans manufactured after the 1986 model year (including 1988-94 S-series trucks) came with TBI intakes. |
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| + | ===Marine intakes=== | ||
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. | 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. | ||
Marine intakes have either the traditional 12-bolt pattern (200/229 and pre-1996 4.3L) or the 8-bolt Vortec pattern for 1996-present. The angle of the center intake mounting holes changed during 1987 to 72 degrees, same as the SBC. | Marine intakes have either the traditional 12-bolt pattern (200/229 and pre-1996 4.3L) or the 8-bolt Vortec pattern for 1996-present. The angle of the center intake mounting holes changed during 1987 to 72 degrees, same as the SBC. | ||
| − | [[File:Marine 4.3 L V6 1995-back non Vortec intake.jpg|thumb|left|1995-back non Vortec intake]] | + | *p/n 14097284, Q-jet only, no EGR |
| + | *p/n 14095286, squarebore only, used with the Carter carb | ||
| + | *c/n 12552422, 2G 2-barrel intake | ||
| + | [[File:Marine 4.3 L V6 1995-back non Vortec intake.jpg|thumb|left|1995-back non Vortec intake p/n 14097284]] | ||
[[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]] | ||
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[[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]] | ||
| − | [[File:1993 Mercruiser 4.3 LX V6 SQUAREBORE INTAKE P-N 14095286, CARTER CARB -339196005.jpg|thumb|center|300px|1995-back Mercruiser 4.3 V6 squarebore | + | [[File:1993 Mercruiser 4.3 LX V6 SQUAREBORE INTAKE P-N 14095286, CARTER CARB -339196005.jpg|thumb|center|300px|1995-back Mercruiser 4.3 V6 squarebore p/n 14095286, Carter carb 339196005]] |
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