We have been running our stop on the top-end for over 8 years now in D-1 S/G. At first it was very inconsistant and hard to get information since we are the only one's who do it. For the longest time we had a old Biondo throttle stop control with the thumbwheel in it but was told by Sam that all the dirt and garbage can get into the thumbwheel and make it very incosistant. You may put 6.15 in the box but because of the dirt in the gears it maybe really set on a 5.99. We always set the Stop RPM's at 4,000 for the whole day and don't touch it. You can do it a few different ways, you can set the bottom number at 1400 and play around with the top number. Depending on the track and weather conditions it may vary, a track like Atco in the Spring/Fall we run around 5.25 to 5.50 as the top number and then change it as the weather get's worse or better. Some other tracks like Numidia which has about 3600 A/A (About what you may deal with out west) we put 6.60 to 6.90 in the stop and it's right on a 9.900 run. It's something to try and it really really really screws up the 160 to 180mph cars who try to wheel race you because if you have a good light and are set up on a 90, 91, 92 they don't catch you till about 1,275 feet of the track and it's very hard for them to judge you. You also leave the top number at 5.00 or 5.50, etc and change the bottom number. This way the stop comes on and when the other car comes up on you and plays the wheel game and you have 9.25 in the box it will come back to life and really screw up their game. If you need any help please feel free to PM me.
Rob K.
112MPH S/G and loves screwing with the fast guys