Question in title? I am just curious.

Rob

 

Quad would have to tell you for sure, and timing is dynamically programmed into the XZT+ meaning that it depends on boost pressure, throttle position, intake air temp, and maybe load. Quad once told me that 24-25* when everything is at the optimal level for timing advancement. He also told me that they have tested higher levels and that 28-30* is no problem for these motors, but the clatter/timing racket would scare away any would be customer.

Cruising down the highway with 5 psi boost probably 18-20*. BTW, most companies don't even measure in timing*, they measure in crank angle.

This is from memory so take it for what it's worth!

 

THanks i was just thinkning about safty type things especailly with an HO motor. I am sure that quad would not put something out on the market that wasnt safe but i was just curious.