Quote:
Originally Posted by simsalabim
Thanks,
It's a CIS car. I have an Electromotive HPV-1 ignition system on it, and also just put in the Euro 9.8:1 PC set. I know that this warrants extra concern with respect to timing advance, but I was assured by my builder that the 29 all-in advance should not be and issue with such a high energy ignition.....?
As far as mixture goes, my tech manual says that for an 81 car with O2 sensor, the CO should be between .4 and .8 percent, taken with the O2 sensor disconnected and pre-cat (my car currently has a cat delete exhaust tip).
Do those numbers sound correct?
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I run a euro SC with the same compression figures and you need to run a fatter (richer) CO than those figures. I run a 3.0 at idle (afr 13.38) and when at speed under load and AFR of 14.5-14.7 (.2) which is close to ideal.
My engine is stock with SSI's and no cat which wouldn't make much dif anyway.
I have an on board AFR guage in place of the clock to monitor the afr.
I run in 100 plus degree weather often with no overheating (195-200 summer avg) on 91 Octane (only thing avail in Az).
The richer fuel setting also assists in that cooling.