[quote=carnut68 What am I missing?
the reason it is slowing ,down correct
![whistling whistling](/ubbthreads/images/graemlins/custom/whistling.gif)
AKA, have you thought about the air density altitude change effects on your car?
![scope scope](/ubbthreads/images/graemlins/custom/scope.gif)
If you have it tune lean for summer heat and humidity it will get a lot leaner in better air
![twocents twocents](/ubbthreads/images/graemlins/custom/twocents.gif)
Does it miss or nose over anywhere during the run?
Another thing to consider is how many runs on the slicks, are they balling up and going away?
![work work](/ubbthreads/images/graemlins/custom/work.gif)
How much 60 Ft ET are you losing? How about the 330 and 660 ET? [/quote] Cab, my 60's have never been good. Tires might have 25 passes. No videos, yet. There are some pic's on Mason Dixons website. If I go tomorrow hopefully I can get a good video. The car feels good. It doesn't do anything stupid.