Bigger cams generally want more air at idle. The way EEC handles this is by changing the duty cycle of the ISC.
There is probably a Jaycar kit you could use as an "interceptor" between the EEC and ISC to add more duty cycle at idle.
Or you could drill a little hole in the throttle butterfly.
BTW, you can run both a Unichip and Chiptorque if you wanted. The Unichip is not actually a "chip", it's a piggyback computer.
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AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute
5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor.
Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash.
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