6.7 cummins timing questions

[Yzf250racer]

H&s had new updated where I can know adjust timing. With box on any power level it has timing rattle at wide open throttle.
My questions are what is safe amount of timing?
Where should I set the blackmaxx at for timing??

 

[Yzf250racer]

Truck has
Arp studs
Blackmaxx
Intake horn
ii 85% over cp3
South bend double disc
Boost tube
Fuel rail plug
Flux 4s
F1 valve springs
Ported valve bowls
Competition valve job
5in exhaust
S472/83/1.00 batmowheel waitin to go on

Fleece 2nd gen kit should be here next week was ordered a month ago

 

[Yzf250racer]

This is the degrees I can adjust too

 

[Headcase98002]

If your getting timing rattle. Lower it.

 

[4neatr]

Their timing adjustment is on 90% throttle and up only, I had some issues at 28(default) so backed it down to 26, no more rattle at WOT.