i do a lot of nitrous builds, 60-70 shot too much to run safely and very hard to manage. smaller shot applied off the line usually produces best et/mph. just finished 05 gsxr1000 bone stock motor that was running 6teens@113 mph, added hd valve springs, hd clutch springs, cleaned/flowed all injectors, added walbro 255lph fuel pump, spray bar, nos mini nitrous controller, tuned on u4.4 with 32 shot measured on dyno . only a few passes made with best et 5.41/131 mph. bike makes 100 ft lbs torque. trick to going fast on nitrous is good consitient fueling, smooth power delivery.
You are right 60-70 is too much. I will spray it 40 and put the carrillo rods for safety.
From your experience what can I expect from 40 shot and 10" stretch?
I run swb and my best is 6.141/195 kph with 1.584 @ 60ft