over the years, ive found this site to be fairly helpful with off the wall jetting when nothing else is available... Nitrous Oxide fuel Jet size and HP Calculator nos n2o
according to it, 900# bottle pressure 55N and 31F with 39 psi fuel should be around 116 to the tires 137 at the crank. looks like a true 150 to the tires would be more like 63N and 36F.
i dont remember what jets they used... do you have a pic of jets? do they look like these? https://www.ebay.com/itm/Work-For-Ni...eqV:rk:20:pf:0
a set of calipers may be in order.
before you start jacking around with jetting, i would make sure of a few things.
1. make sure the nitrous pressure is 900+
2. make sure you have at least a 155lph fuel pump
3. make sure the fittings throughout the system are not blocking any orifaces.
replaced the 93'ish coupe with a 76 F100, 393, 11.5:1, TEA CNC 205 TW's, custom Hyd Roller, Super Vic, 830 HP, AOD, Edge custom conv., Silverfox SPT-MAC-TB.