Revision as of 03:53, 17 May 2016

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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Optimum runner length vs RPM

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