| apparent when his car was on the dyno and it blew the Z1 electric fan setup's fuse 3 times during that tuning session. When he took the car to the drag strip and ran it full-tilt, the problem showed its head and the car apparently ran lean and detonated and grenaded the bottom end. I would be happy to post the fueling and timing maps that were put together for his setup to reveal the fact that the program was not at fault - there was sufficient fuel delivery and proper ignition timing used. In fact, I have both programs from when it was originally tuned and when it was retuned in November of last year and there is actually more fuel delivery used in the November tune than what was previously in the configuration. It is my belief that the electric fan setup was pulling excessive current (as indicated by blowing several 20A fuses) which taxed the system enough to starve the fuel pump of the current required to flow ~600HP worth of fuel. I was noting this while on the dyno during that November tune as well - Chris will confirm these facts. ..... just to clarify things .... The fueling maps are reaching a peak of 57% enrichment by 5500RPM and maintaining that to redline and the ignition timing values are 19 degrees BTDC from 5500RPM and up as well. In the original program tuned back on January 24th, Chris's car showed that the fueling system was working better than average with a peak of only 43% enrichment to achieve an 11.5:1 A/F ratio. Whatever was going on with his electrical system was the reason for the higher enrichment values required to achieve a safe A/F ratio later that year in November. Unfortunately this electrical issue caught up with the engine when it was being taxed to its fullest capacity while on the drag strip. There was nothing wrong with the tuning done on the dyno though.
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[ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
Albert Einstein
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