Building an inline 6 Chevy 250 engine
(→Deck height) |
(→Intake manifolds) |
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==Intake manifolds== | ==Intake manifolds== | ||
| − | Beginning in the mid-'70s, the inline 6 Chevy got an integrated intake cylinder head similar in design to the Ford Falcon Six. This was a step in the wrong direction for a performance engine- the intake being cast as part of the head means it would take too much work to remove it to be able to use any kind of 4-barrel carb. | + | Beginning in the mid-'70s, the inline 6 Chevy (with the exception of the tall deck 292) got an integrated intake cylinder head similar in design to the Ford Falcon Six. This was a step in the wrong direction for a performance engine- the intake being cast as part of the head means it would take too much work to remove it to be able to use any kind of 4-barrel carb. |
But the detachable intake head can be fitted with a large variety of intake manifolds from the cast iron stocker to custom EFI (including multipoint fuel injection setups e.g. the use of Jeep 4.0 fuel injectors and the use of the Jeep throttle body requiring the use of a custom fuel rail and modifications to the intake manifold), IR, 4-barrels, staged 2 barrels, multiple carbs from Stromberg 94/97s to Weber's, to name a few. | But the detachable intake head can be fitted with a large variety of intake manifolds from the cast iron stocker to custom EFI (including multipoint fuel injection setups e.g. the use of Jeep 4.0 fuel injectors and the use of the Jeep throttle body requiring the use of a custom fuel rail and modifications to the intake manifold), IR, 4-barrels, staged 2 barrels, multiple carbs from Stromberg 94/97s to Weber's, to name a few. | ||
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| + | (GM do Brasil did manufacture multipoint fuel injection (with revised cylinder heads using the separate intake manifold) for the 250 - Brasilian market Chevrolets (Brazil-market Chevrolet Omega and its local produced GMT400 trucks had the 250 (4.1L); production ended in 2001.) | ||
The stock intake uses the exhaust manifold to provide heat to the intake, but if aftermarket exhaust headers and/or intake manifolds are used, this feature will be missing. For many applications that will see daily driver duty, an aftermarket intake equipped with hot water heating of the plenum is a plus. | The stock intake uses the exhaust manifold to provide heat to the intake, but if aftermarket exhaust headers and/or intake manifolds are used, this feature will be missing. For many applications that will see daily driver duty, an aftermarket intake equipped with hot water heating of the plenum is a plus. | ||
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