I'm finding there is a lot more to this pulling game than meets the eye..
You would think it's all about the tractor, whoever dumps the most money into the biggest motor will win, but there is a whole nother parcel of things to screw up on in the driving side as well...
I still get as nervous and "fidgety" lining up to go 200' and I did to go 20 laps...but here you only get one shot at it... on a circle track, if you screw up a tad, you still have 10-12 laps to make it up, but here if you don't get off the line right it's tuff to make it up down the track...
Went down to Gleason to pull with the Central Wisconsin ATV Pullers, (80% ATV, 10% mini rod and a few Garden tractors) a little nervous with the new cam in the motor, get to the line and get the green flag, stomp on the gas and I look down to watch rpm rise for launch and realize I didn't turn the Digitron on yet...
That throws me for a second, but I quick hit reset and launch "by ear"...I must have bad ears cause I didn't have but maybe 6000rpm when I slipped the clutch and let 'er go... new clutch works and feels good..I go down the track and see rpm is "climbing" as I go but I have an occasional "pop" in the exhaust, so of course I worry about that...I get it up to 6,900 down the track befor weight transfers, so I guess the motor is making some power, I just lost ifull potential on the launch...little bit of smoke at the end, but thats just burning off the "outside" of the block from the rebuilding...

I get 275' for 4th out of 4 with 289' being the winning pull..You can hear the "pop" on the video, now I know what it is but then I wasn't sure if it was a lean pop or a too rich pop...If it's lean and I go leaner I can damage the motor, so I go 1/4 turn richer to be safe...Come to find it's the wrong way...
I had tuned it up in the garage with the airfilter off and then didn't "readjust" after I put it on so it went rich at the track...I go for second pull (tach on this time) and it bubbles and gurgles won't rev past 6000...
Should have aborted the pull and reset, but I'm new so I launch hoping it'll clear up down track...it didn't, so half way down I reach over and twist the carb adjuster 1/2 turn "lean" and it clears up and really starts pulling (again too late) ...another 4 of 4 but this time I was within 2' or so of being in the money.. (didn't get video of second run)...
I'm pretty confident the motor has much more in it than I let it show, now that I got it tuned in, I just have to tweak the nut behind the wheel to get get the launch sequence right and give 'er a fair shot...