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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,235
Garage
My 79 has the hole. It must be to allow for idle air since the throttle plate is closed completely at idle. This hole and the idle air bypass via the idle speed screw is the only means for the engine to get air at idle.

I removed my Aux air control valve when it started hanging open and readjusted the idle speed screw to idle at 1000rpm after plugging the holes up. Now I just need to rev it a little with my right foot when starting it cold till it warms up enuff to drive off.

It was a California model car according to the engine serial number and the distributor on it when I bought the car.
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"

Last edited by fredmeister; 05-15-2013 at 08:53 AM..
Old 05-14-2013, 09:12 AM
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