Surreptitious.....

[oldeskewltoy]

Throttle body..... I'm running the single T/B, with some modifications.

1) the manifold is a reversed fwd type... so I need a fwd T/B





2) I will not be using the mechanical fast idle circuit to offer me a fast idle during warm up - the ECU will be monitoring coolant temps and the ECU will either;
a) open a BSV.... or
b) operate an IAC motor (idle air control)

because I will not be using the facory equipped fast idle circuit I chose to remove the assembly entirely and make a block off plate instead. IF I choose to go with an IAC motor, I can tap the plate to accomodate the IAC motor fittings.






The top photo shows the bottom side of a T/B, w/ fast idle assembly. The second photo shows this unit removed, the last photo shows the block off plate.

To try to answer questions BEFORE asked....

1) in the top photo... note the 2 large ports in a vertical line(on left)... these are for the coolant lines. The coolant flows through these and warms the small end of the assembly.

2) The middle shot shows the fast idle "circuit". The 2nd round hole on the left(2nd as in closer to the middle) is the port outside of the throttle plate(as in #1 in the uppermost photos), the weird shaped rectangle with the small elongated hole is the inside port.

3) the bottom shot shows the block off plate as it blocks only the air. The coolant ports do not need to be blocked off since there is no longer any coolant anywhere near the T/B


More to come.......