Outer Limits 4x4 Board

Just looking for advice on what pressures I should run in the 37x13 tsl boggers that are on 15x10" rims,
The rims don't have internal or external beadlocks,

I'm fitting them to a 75 series landcruiser and doing a flat track all terrain comp this weekend that will have the usual logs and h
wombat holes but also a couple corners where we will b able to carry a little speed into them,

So I'm just chasing a happy medium that will allow me to both utilize the tractionthey provide but also hit the obstacles and corners with a bit of momentum without having to worry about rolling a tyre of the bead,
cheers in advance For your input, Mosko

its always going to depend on the individual and the vehicle, but after competing on them for ~5years we always had great success with:
Front 10-12 psi crawling& allterrrain 12-14 for some more speed type events, Rear 8-11 for pretty much everything. lower pressure was rarely used and then only for crawling and play. 12/10 was the general setup and it worked well. Siping and cutting does make a big difference, The biggest complaint i ever hear about boggers is usually cus' they are stock, don't forget these tires are 'made to be cut'! and honestly if we had to go back on non-comp spec rubber then we would be running damn near paddle tires