I think if i went to a dyno and couldn't run my headers, my ignition system and use my timing light. I would find another dyno.
EVERY time i have changed headers, it has changed the engine output along with the tune up.
Joe
I agree 100%. If you don't test with the parts you run you are wasting your time, every time.
I disagree on that
![tsk tsk](/ubbthreads/images/graemlins/custom/tsk.gif)
, I always finish the tune up in the car, never on the dyno
![twocents twocents](/ubbthreads/images/graemlins/custom/twocents.gif)
Fuel and oil being slung around in the carb. and motor that has affects not repeatable on the engine dyno
![shruggy shruggy](/ubbthreads/images/graemlins/custom/shruggy.gif)
As well as the location, altitude, weather and air differences between the dyno room and race track
![shruggy shruggy](/ubbthreads/images/graemlins/custom/shruggy.gif)