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scarceller scarceller is offline
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Join Date: Oct 2006
Location: Southern MA
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On the CIS topic. I owned a 75 2.7L with CIS and if I had that car today I'd keep the CIS but I'd rip out the factory CDI and install a programmable stand alone ignition that sampled RPM and MAP and then allowed you to build a custom Load vs RPM ignition table. If you did that you'd have fully programmable ignition across all engine loads and rpm.

In summary:
- keep the CIS it works well!
- ditch the ignition and install fully programmable system
- and I personally would use old school inductive coil if possible.

I have not researched programmable ign systems much but several are available, find a good one that has a 2 axis table with load on one axis and RPM on the other, and Load is deduced from MAP or TPS.

The table would look something like this but the rows would be load 0-100%

Hint: this table would be a great starting point for a 3.0L CIS car! Also try finding a product that offers hit-trace feature, this allows you to see on the laptop exactly what cell your in during a live tune session while on the dyno. With hit trace you can quickly optimize the ignition for peak torque for the given load.

This system at a glance looks decent
But it's all Ford based components, and no more distributor at all! Useds Ford EDIS, decent ignition system, more than enough for these motors.
1984 911 Carrera Cab M491 (Factory Wide Body)
1975 911S Targa (SOLD)
1964 356SC (SOLD)
1987 Ford Mustang LX 5.0 Convertible

Last edited by scarceller; 11-19-2014 at 12:17 PM..
Old 11-19-2014, 12:07 PM
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