[billy leber]

I like to bring the stop on at .100 like Charlie said , I tried to bring it on at .030 , granted I only tried it for one run but im pretty sure the car didnt get out of the beams before the stop came on. I recall feeling like I hit it good and looked up to see an .040 light so I put it back to .100 and was .003 red next hit. If you are running a dominator carb with an under carb stop I wouldnt drop rpm below 4200 ,IMHO. The farther you screw the knob out the lower the rpm will drop, its easy to set by taking the air out of the stop cylinder and put a spring to hold stop blades shut, then put it against the trans brake. Your rpm will be 150-200 rpm higher when your rolling down the track than when on the break, so if you want 4200 set it at 4000 on the brake