shots from the garage...

The 5.7 pass…. on graph. my biggest enemy is probably myself as I tend to run on the rich side. That certainly showed as we dropped jet… a lot of jet and performed much better. Even on these graphs there is still an “occurrence“ around 5400 with the converter coming off the brake that I question. We don’t graph every pass and actually after we became somewhat comfortable with the car really quit using it…. which is lazy and it would have been nice to consult other passes for comparison. I did find some earlier passes (this spring) that looked fairly decent, but once I stretched the graph out there was still a bump at that rpm. tons of rpm fallback that could probably be improved upon. Not sure why I’m fixated on that 6000-6200 stall. Thats where my 727 converters were and it seemed the car worked well, of course here I am looking at the best hit the car has made….. maybe I should leave well enough alone.

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Nice data/info! What is the updating frequency of the A/F meter? I assume that the scale line '4000' is 11 and '6000' is 13? I never believe the precise reading of the A/F because of so many variables BUT, it's a good ballpark reference. In my application and some I have worked with it'll indicate LEANER that what it actually is so yes you probably have room to jet down (always referencing the plug readings) I'd start looking really close at those, to see how distribution falls! because you have a bank or average. Also I'd like to see the other bank in comparison. And yes there's more in a higher stall. But I still feel there may be a couple MPH left in the 660. If it were me I'd start playing with airpans and see if the data varies before I'd assume something else needs 'fixing'.