So on August 24th with a DA of 2200 at NE Dragway my Valiant ran 137.5 mph.
Yesterday with a DA of 1620 the car ran a best of 134.5. Is this telling me that the carb needs to be fattened up?
I would add that with that small a DA change and a 3 MPH drop it was a combination of the stuff laid out in post 2.
Sometimes I pull 2 may three degrees of timing out for something like that. You have to test and see how your engine responds to varying weather changes.
I’ve seen engines that a 1000 foot DA change wouldn’t change a thing.
Those are great bracket engines. I hate them, but that’s what you want in a bracket engine.