Hello I'm building a 12V for a customer and he asked me if i would set his timing to 18 so my question is how many mm of lift does the pump need to have at 18 degrees?

Please note I have a fair amount of experience with building Cummins and this baby has it all ARP all throughout aftermarket rods, pistons, big cam, 150 springs, double disc clucth, in cab adjustable afc, fire ring head and block just to name a few of them.

However I do not have a huge amount of p pump experience so here I am asking for help please.

Also if you have a better thought on what timing to use let me know.

Customer is hoping to get to 700 hp but I think 600 will be good.

It has 125 injectors and delivery, valves governor spring,s and not sure what else done to p pump besides arc.

Thanks to all of you who chime in.