I know on a carb engine you can adjust when the advance comes in by changing the spring in the distributer, but what I want to know is how do you change when the advance comes in on a efi car where the is no spring. Anyone know?

 

me too

 

Need a computer + and aftermarket EEC (Tweecer, PMS, etc) to set it based on load, coolant temp, intake air temp, etc, etc......

 

Anyone know anything about changing some kind of metal strip inthe distrubuter?

 

That would be the "octane rod".....the metal strap on the left in the pic below....



Used to modify the base timing 2-3 degrees to "compensate" for octane.......it does not alter the total timing additions made by the system.

 

Ok so explain how change the total timing.

 

i think you would have to use tuning software like tweecer or anderson pms.

 

Aside the base timing setting, you would have to access the system logic and modify these......


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WOT Spark Advance vs. ACT – FN135 A9L
ACT____-256___-256___-256___-256___150___240___254
Degrees___0_____0______0______0_____0_____-6____-6
(Courtesy of http://www.freewebs.com/vristang/eecivfaqs.htm )

 

Would this be similar to getting a dyno tune?

 

lets just put it this way... until you know more about the inner workings of the EEC computer.... leave the tuning to professionals... please