1983 Porsche 944 2.5l NA Microsquirt

[feelingsupersonic]

It's been running like a boss for a few weeks now, thought I would share the build since a lot of other 944 guys seem interested in the conversion as Motronic parts rot away.

General build thread on Rennlist: http://rennlist.com/forums/924-931-944- ... -more.html

Hardware:

• Microsquirt controller with 8' semi-terminated harness
• Ignition trigger: 36-1 trigger wheel on crank from GoingSuperFast, hall effect sensor from DIYAutoTune
• Ignition: LSx coils running wasted spark
• Fuel injectors: Bosch 0 280 150 431 which are high-z and will be good to ~210hp (applies more to 944S).
• Air metering: 1 bar MAP reading from the manifold, GM IAT reading where AFM used to reside
• Coolant temp: stock unit
• TPS from 944 turbo mounted on rebuilt stock throttle body - stock TPS will not work
• Idle control: stock auxiliary air valve, gets 12v from main relay
• Fuel pump controlled by dedicated relay, activated by Microsquirt
• AEM UEGO wideband O2

The wiring is much like any other car because the stock harness is gone. I made a playlist to document the wiring and some other install prep:
https://www.youtube.com/playlist?list=P ... K0emy2OQQv

Car runs smoother than ever before, and pulls harder. Can't recommend this enough! I have about $1500 into the build if you include things like a timing light, wiring tools, etc into the equation. Someone who already has all that stuff or wants to do with less can do it for under $1000.