We brought the car down to Southern California this week for some quality time at Best of Show Coachworks in San Marcos, CA and decided that it was worthwhile to swing by Turn Key Engine Supply for some long overdue dyno tuning. We had been having some lingering idle issues and were still looking to resolve our 148 mph engine cutout problem that plagued us at the Nevada Open Road Challenge in May. After searching for someone who was comfortable with the MSD MEFI4B ECU, our good friend Steven Rupp put us in touch with Kory at Turn Key.
David drove the car from Best of Show to Turn Key on Tuesday morning which gave him an opportunity to test the steering changes and arrived on Turn Key's doorstep at 9 am, ready to go. After getting the car secured Kory started working on the idle circuit and found, as expected, several issues in the calibration - the worst being that there was no map at less than 2000 rpm. It turned out that the calibration we had from Katech had a power run only an nothing for idle or intermediate driving. After some work Kory had the engine purring like never before and, after nearly a year of testing, we finally had a car that would idle reliable and without drama. We do still seem to have a lingering issue with our TPS sensor (or wiring) but will work on that over time.
With the idle calibration in place Kory moved on to some power tuning and immediately found an issue with the charging system. David and I had been chasing down a low voltage issue for a while and Kory brough it to the forefront as soon as he loaded the car and started a pull. After working through some wiring options, we decided to take the car back to Best of Show to add a relay for the ECU to try to isolate the power as well as start working on our transmission swap.
We'll be heading back to Turn Key next week to finish our tuning and hope for some great results!
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