actually no. they dont let just anybody run these cars. You would need a licence first. sportsmen class dragsters that run on gas use automatic transmissions.They leave the line in a controld way.They use a transbrake with a 2 step rpm limiter. These cars are deadly consistant. They usually run within .001 et. It is a controled automatic setup.
I really dont care if you beleve me, cause im guessing you dont.
In that case one of two things is occurring:
If traction limited, firing order will impact available traction and how much power can be put to the ground.
If NOT traction limited, the change in firing order altered the output of the car which the dyno will absolutely show. The peak numbers may be the same but the shape of the curve may have changed, etc. If not traction limited, and the dyno output didn't change... something else had to have changed to alter the run times, especially if the cars are as consistent as you're saying.
And yes, I know about licensing, etc, I play in lots of motorsports circles too so I'm used to that, I was obnoxious to make a point.
What sanctioning org are you running under? Quick googling show lots of various classes fitting into 'sportsman' racing under some of national groups, with no specific class to target I wasn't up for searching for the needle in the haystack to read up on the exact cars you're playing with. With the consistency you're talking about, seems like you're running more of a bracket targeting game than shooting for absolute lowest strip times? Poker vs War as it were?