The AL12-EI70 kit includes a high output AIRCRAFT alternator with an exclusive internal crowbar over-voltage protection circuit. The alternator is fully pilot controllable through unique internal wring. The dual internal fans are designed for aircraft engine rotation for maximum cooling. The AL12-EI70 kit includes the tension arm, mounting brackets, all required AN hardware, and V-Belt for Superior and most Lycoming engines with a 9-3/4 engine pulley.
Ive had pretty good luck with this alternator. I just replaced it at 1000 hours just for my own piece of mind. The 70A runs at a slower RPM than the 60A, and works well on my IO-540. If I were doing it all over again though Id consider doing an externally regulated alternator with an adjustable regulator. Mine runs between 13.9 and 14.0V right now, and it would be nice to tweak that to 14.2.
No, these are intended for use in experimental aircraft only.
The bracket is our part number 07-18013, the adjustment link is 07-17782, and the support arm is a special order Hartzell part number 10-1002.