V6 Chevy 90 degree engines
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#200 cid (3.4L), it is basically 3/4 of the 267 cid SBC V8. Made 1978–'79. | #200 cid (3.4L), it is basically 3/4 of the 267 cid SBC V8. Made 1978–'79. | ||
#229 cid (3.8L)- not to be confused with the Buick-derived 3.8L 231 cid V6). It is 3/4 of the 305 SBC V8. Made 1980-'84. | #229 cid (3.8L)- not to be confused with the Buick-derived 3.8L 231 cid V6). It is 3/4 of the 305 SBC V8. Made 1980-'84. | ||
| − | #4.3L (262 cid) is 3/4 of the SBC 350 and as such, shares some of the parts and dimensions with the 350. Made 1985-2014. The 1992 model year saw the first use of a balance shaft; all 1995-present 4.3L V6 engines are equipped with a balance shaft. The 4.3L V6 got a revised cylinder head in 1996 with specs much like the SBC V8 [[Vortec L31 cylinder head]]. | + | #4.3L (262 cid) is 3/4 of the SBC 350 and as such, shares some of the parts and dimensions with the 350. Made 1985-2014. The 1992 model year saw the first use of a balance shaft; all 1995-present 4.3L V6 engines are equipped with a balance shaft. The 4.3L V6 got a revised cylinder head in 1996 with specs much like the SBC V8 [[Vortec L31 cylinder head]]. Passenger car usage was limited to B and G-bodies; after 1990 (with the exception of some 1991-'92 fleet Caprice) the 4.3L V6 was used exclusively in truck/van/SUV and marine/industrial use. |
| − | The 4.3L V6 has the advantages of far better availability, a larger displacement and larger bore diameter than the 200 cid or 229 cid V6. It also enjoys better aftermarket support. For these reasons, the 4.3L | + | The 4.3L V6 has the advantages of far better availability, a larger displacement and larger bore diameter than the 200 cid or 229 cid V6. It also enjoys better aftermarket support. For these reasons, the 4.3L is the preferred Chevrolet V6-90 engine for performance use. |
==Bore and stroke== | ==Bore and stroke== | ||
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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]] | [[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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| − | The 1985 Astro van had this intake; passenger cars came standard with TBI fuel injection | + | 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. A central port injection intake manifold (with an upper and lower casting) was introduced in 1992 which has a central fuel injector with six poppet valves (used with the Astro/Safari and S-series SUVs (Blazer, Jimmy, Bravada), later revised in 1996 with sequential fuel injection. Central port injector used with 1996-'01 were known to have fuel leakage where GM redesigned the fuel spider which converts the CSFI system to a multipoint injection system. |
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| + | The limited production Syclone/Typhoon has an intake manifold which uses a multipoint injection setup (with a throttle body similar to the one used with the tune port injected Corvettes and IROC-Z Camaro/Trans Am). Parts for such a conversion do not exist from the aftermarket. | ||
===Marine intakes=== | ===Marine intakes=== | ||
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*[http://www.brodix.com/heads/v6heads.php Brodix heads] | *[http://www.brodix.com/heads/v6heads.php Brodix heads] | ||
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[[Category:Engine]] | [[Category:Engine]] | ||
[[Category:GM]] | [[Category:GM]] | ||
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