I just updated the simple and cheap 555 EFI system
on the web site. We hope to test it this coming year
on a RX8 P-port engine I have installed on Milo's
test stand.

http://www.rotaryeng.net/simple-cheap-555.html

Paul Lamar


But for less than $300 ($275 amazon) you can get a modern ignition
controller for an RX7/8
http://www.statracing.com/buy/aem/aem-twin-fire-ignition-module.asp
that works with the current distributor; just add some coils.

Misspoke on early comment;
But It'll become easier to use racing EFI's when they remove the lead from
aviation fuel.

brian gochnauer

What does that have to do with the 555 fuel injection?

Since the price does not include the coils there are several
ignition controller schemes that we have discussed that are
much cheaper.


BTW the apex seal oil hole pressure taps give a much more
uniform manifold pressure readings so the 555 system should
work pretty well. An unintended favorably confluence of
technologies :)

Paul Lamar