Subaru to 914 trouble fixes, My quick fixes installing a Subaru engine Options

[904svo]

Here are some of the fixes I used when installing a 2007 Subaru WRX engine in my car.
I did not want to change any of the wiring in my car as it has a 1973 914 wiring harness installed
in it. I wanted to keep the stock gauge cluster in it but adapt it to a Subaru engine to look stock.
Here are some of the troubles I found and the fixes I used

#1 Tach
Convert the 5 volt output signal from the Subaru to a high voltage pulse that the 914 tach requires.

#2 Starter circuit
Added a hot starter relay which removed all the Subaru starter check circuits

#3 Stop Fuel level DTC’s
Note if connected to 914 low warning , this will reduce power level

#4 Add Cruise control lights/Check engine lights for trouble shooting DTC’s

#5 Make the 914 ignition key look like a Subaru ignition key for the immobilizer circuit

#6 Oil light and Oil pressure gauges/ Oil temperature gauge converted to Engine temperature gauge
To convert Oil temperature to Water temperature gauge add a 75 ohm resistor in series with the
extra temperature lead ( used for stock Subaru gauge panel) to the oil temp gauge
If you have a Oil pressure/Oil light sender added to your gauge cluster just replace the Subaru Oil
Pressure switch and use the same wiring otherwise just wire the Subaru sensor to the Oil lamp.
Connect the Subaru alternator (Black/white) lead to the 914 Gen lamp bulb.

If you see any poroblems let me know.

[jpnovak]

Reviving this thread to ask a question.

I have a Suby transmission in my 914. I want to drive a speedometer that fits in the dash. In an earlier post you mention that the VSS signal from the transmission will drive a stock, late model speedometer.

The Suby seems to put a 5V signal. It is supposed to have 4 pulses per revolution. The 911 style speedometer has eight pulses per revolution based on the magnetic disc in a 915.

Can anyone verify the output signal from the VSS?

I am currently using a bicycle computer but I have found that its top speed is not quite high enough. (IMG:style_emoticons/default/smile.gif) It was certainly easy to wire in.

Thanks