Here is a pic of the throttle body about ready to install to the manifold. It is upside down. All these tubes will be more or less hidden below the throttle bodies.
Some unresolved issues. Suzuki has a very similar throttle position sensor as the ford unit. If voltages match up it may be usable.
Throttle cams from the stock throttle body will be used to have proper accelerator feel and wide open throttle position. I need to aquire these. A spare stock intake manifold may be on the way.
Susuki has an extremely nice stepper motor drive with gear reduction to drive the secondary throttle plates. I will have to build linkage for a possible vacuum operated ford drive from the runner control butterflies.
MAP/IAT will go in a small chamber (can) that that will quickly respond to vacuum change and that will average out vacuum pulses. This will be driven by rear ports that I have drilled into the throttle body through an existing unused boss. It will be in the air box and will respond to temperature by conduction to the can.
Of course my existing two questions in the first post are unanswered. They will be when I get a hold of a used manifold but any head start here would help. I plan to fabricate a small cover like a thermostat cover for the egr pipe area if the pipe is water cooled outside of the head.
About the horsepower on the motor cycle, it certainly is not throttle body limited as the combined area of these throttle bodies is more than enough for 2.3 L in a race motor. On the Motorcycle it is displacement limited as all else is pretty wild. Some of the aftermarket offerings for the Duratec use 35 or 38 mm throttle bodies. I did not have much selection in size to be able to choose exactly in that area.
This is a picture of the Suzuki Air box. I have modified it with a 4 inch Flanged inlet from Spectre. On the left is a row of connectors for the front of the throttle bodies. On the right is an unused inlet that may serve as a space for my vacuum can.
