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Intake manifolds for a Turbo engine. For more airflow, a higher flowing carb, intake, heads (ports and valves) and exhaust system is beneficial. Supercharging will increase power on a stock engine, but increasing the airflow capability of the engine will bring your blown engine to its full potential
Stock manifold with carburetor hat
See #Boxed Carburetor
Tuned-port Intake
Log manifold
Log Manifold
UM-1 Manifold
Ram plenum manifold
clyon's A-series Turbo Manifolds
This kind of stock manifold-runner is limited in horsepower. The turbo can force more air through it (for more HP) but the air temp will escalate, limiting the power to be made.
Tuned Runner Length
For scavenge effect at 5000 RPM, the runners should be 20" long!
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Stock Manifold
Blow-through systems can use the stock Intake Manifold.
Stock manifold with carburetor hat
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Stock manifold with EFI throttle body
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Blow-through system feeding carb top-hat
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This was a popular OEM method. phunkdotaspok say the stock Hitachi can handle 10 psi with a good top-gasket seal. In an NA application, a warped top is not a problem, as there is no pressure in the float chamber. This only becomes important in boosted application.
Boxing carb. This allows a more or less stock carb to be used, the outsided pressure balancing the inside pressure
Inside the box
downdraft Dellorto carburetor
Weber DGV hat
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datto1000wagon
