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Throttle bodies have become a familiar sight on motorsport engines as a means of achieving unrestricted airflow and of delivering fuel more accurately than carbs. We currently offer two types of throttle body induction system.

DCOE flanged Click for image
Originally designed as a means of upgrading from Weber DCOE carbs to fuel injection this type of throttle body will fit on to any manifold design for DCOEs. For an Ecotec 45mm bore is ideal but they are also available in a 48mm bore size on request. To maximise the effect of these throttle bodies (or carbs) we can supply a QED custom designed inlet manifold.

Direct to Head Click for image
Direct to head throttle bodies are a concept that dates back to our work with the earlier Vauxhall/Opel engines and we exclusively offer the same benefits for the Ecotec.This design requires no inlet manifold and as the name suggests the throttle bodies bolt directly to the cylinder head. The result is throttle bodies that are easier to fit and lighter than any other system available today. Available with a 45mm parallel bore to the butterfly and a taper up to the inlet port. Versions are available to take single or double injectors. An integral air bleed screw makes idle speed easier to control.

There are obviously many other designs of throttle body. However we have carried out extensive dyno testing to arrive at the best possible solution combining simplicity and effectiveness in a compact lightweight package.