We’re all set for another trip to the track. We’ve made several changes since our last outing.
We think we figured out our high speed vibration. Both of the rear tires had to be rebalanced. The drivers side was off by 5oz. And the pass side wasn't much better. These tires and wheels were purchased mounted and balanced through Summit Racing but who knows who did the actual mounting and balancing. Piss poor workmanship!
We got the wideband o2 meter working again. It needed a new o2 sensor. The old one had been fouled with leaded racing gas.
Once the wideband was working again we figured out we were running super lean. Like 13.7-14 on the big end. Maybe the reason why it was heating up to 210 after a pass. We took a guess and jetted up from 75 to 78 on both sides of the carb. We haven’t made a pass since re-jetting but I bet it still wants a little more. Holy crap what a difference the headers made! It was the only thing we changed from when the motor was in my Highboy.
The pan evacs are hooked up now. We think all of the vacuum leaks are fixed. The dipstick was the culprit we think. Will see what the vacuum gauge says.
Almost forgot....We hauled it down to the nearest truck stop and rolled it across the scale. It came in at a robust 3880lbs with me in it. And it weighs 400lbs more on the front axle than the rear. Lots of work to do here.
And last but not least, we buffed out the 57 year old paint. Heck.... just knocking off all the oxidation should be worth a tenth.
We also mounted a couple of old "Cobrajet" emblems on the valve covers. They came from a '69 CJ Torino that dad raced back in '75.