803 Series throttle body kit with vertical shaft 40mm

803 Series 4 Cylinder throttle body Kit vertical shafts.
Includes:- 4 x 803 series throttle bodies, special vertical shaft linkage kit with Pro-series cable pull and throttle stop kit, throttle cable bracket & 4 x Pro-series ram tubes.

This kit is designed for where a fuel rail is mounted to the manifold, cylinder head or in conjunction with an external injector mount kit.

Product Details

4 Cylinder 803 Series Throttle Body Kit with Vertical Shafts Contains:

•  
• 4 x 803 Series Throttle Bodies 40mm
• Special Vertical Shaft Linkage Kit with cable pull & throttle stop linkage
• Throttle cable bracket
• 4 x Pro-Series ram tubes
•  
• (Manifold, TPS and injectors not included) P.O.A. for these items

WHY THE VERTICAL SHAFT?

 

The vertical shaft has a major advantage, in that it introduces less eddies (than a horizontal throttle shaft) in the air flow as the air passes from the throttle shaft (and fully open throttle plate) to either the divider between the ports of a 2-inlet valve engine, or the vertical valve stem on a single inlet valve engine.

 

The reduced eddies have been responsible for power gains in high end race engines.

 

Due to effects at closed and very low throttle openings, these throttle bodies are only recommended for race engine applications.

 

INJECTOR MOUNTING

 

The 803 Series throttle bodies are designed for applications where the fuel rail is mounted to the manifold, cylinder head, or in conjuction with an external injector mounting kit.  Fuel injectors are not mounted to these throttle bodies, and are generally mounted directly to the cylinder head, or an external injector mounting system.

 

HP RATINGS

 

HP/kW Ratings vary from engine to engine.  The power ratings given here are only a guide, and are not absolute power ratings.  Engine power is determined by intake, exhaust, cylinder head design, camshaft design, compression ratio, fuel type and quality and many other factors.

 

40mm - 45HP/34KW* per throttle - with potential of a 5% increase in power.

 

*This number is a guide only and should be used in conjunction with real-world experience.

 

BUILT WITH THE HIGHEST QUALITY STANDARDS IN MIND

 

Years of development has lead to constant improvement right up until today, where these 803 Series throttle bodies are now considered the industry standard by many engine builders and engine tuners alike.

 

Track racing is one of the most demanding environments any fuel system can be exposed to.  Using anything less than the highest quality intake components may lead to not only a disappointing finishing result, but also engine damage.

 

PROFESSIONAL GRADE MANUFACTURE

Manufactured from 601 Cast aluminum and heat treated before being CNC machined.

The butterflies are measured for each bore & precision machined to a 0.0005"" tolerance.

Butterflies are secured to centreless ground brass shafts with split screws to ensure reliability and serviceability.

All are fitted with bearings rather than bushes to eliminate axial shaft movement.

Low stiction bearings for sharp throttle response.

We now recommend

and use SKF bearings.