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Originally Posted by MT930
Here is what I have. Based other comments this may not be stock. The service records show that the PO sent the tach out for repair could they they have put a new face on it that goes up to 1.5 bar (no description on the exact work performed). and can it be calibrated? I plan on getting a clock mount anyway. Can anyone tell me if this is a stock tach face?
I appreciate your help.
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That Tach face is a stock 1977 Turbo gage . Why the factory used a 1.5 boost calibration with no inter cooler pre 1978 turbos is odd unless it was a carryover from the 934-5? The question for you to figure out is is the innards calibrated to one bar needle movement and showing 1.5 on a wrong face plate or do you have a true early 1.5 unit and you are indeed over boosting. Sometimes there is a simple solution to a seemingly complex scenario