Speed Six throttle body modification
This modification addresses the well documented issue involving wear on the throttle body housing. The spindle that the butterfly mounts to is not supported by a bush or bearing, but merely by a hole drilled in the aluminium body. The aluminium wears away allowing the spindle to move and vibrate and also lets air past in to the intake. This means the bodies go out of tune very quickly after being balanced, and makes it extremely difficult to set a bank of six up to run correctly. The usual symptoms of this include erratic idle, poor low speed running, poor emissions and a pronounced hiccup in the power delivery around 5000 rpm.
Our solution is to machine a pocket in each side of the body using a highly accurate CNC machining centre and letting in a sealed, greased ball bearing and special viton lip seal. We have now been carrying out this modification for six years and modified over 100 sets of bodies. Our client base for this includes TVR Parts, STR8SIX, HHC, Mat Smith Sports Cars and Track V Road to name a few as well as clients in France, Germany, Netherlands, Japan and America.
While apart the bodies can be vapour blasted to achieve a 'better than new' finish, and the linkages re plated in a three stage nickel then passive zinc coating so they regain that golden shine with added corrosion resistance.
Further throttle body modifications
While the bodies are apart we offer some performance modifications as well. The spindle can be machined down to allow more air flow in to the engine. This can allow the engine to produce a few more horsepower. For owners using an aftermarket airbox with silicon hoses to join it to the bodies the next modification removes the step in the intake and blends it with a radius to help smooth and therefore increase the air flow into the engine.
Front Lowering spacers
This kit was designed after owners and racers complained the front of the T cars looked high, but lowering them too far upset the geometry and therefore handling. These anodised spacer blocks lower the front of the car approximately 25mm without changing the damper position (and therefore travel) or the all important lower wishbone position. The position of the steering arm relative to the lower wishbone does not change either. These have been used on race cars with great success as well as road cars to improve aesthetics and handling. They come as a kit that includes longer high tensile mounting bolts.
Sagaris steering arms
These are the latest addition to the portfolio after having many requests to supply them. These steering arms were only used on the Sagaris and reposition the steering track rod to make it parallel with the lower wishbone. This helps to eliminate bump steer commonly known on the earlier models. These arms have been remanufactured with the same geometry as the originals, but with a much more modern and aesthetically pleasing shape.
