i have a jdm f22b and there is no knock sensor an i plan on using a usdm h23 ecu and wiring harness which requires you use a knock sensor or else it will retard the timing and make it run like crap so my question is how can i put the knock sensor from my h23a1 on to my f22b can i weld a nut to the f22b and screw in the knock sensor??

 

Yes, that's what a lot of people do, except the just JB weld it on there. When my knock sensor broke, not only did it retard my ignition, but it would generally stall in parking lots or stop and go traffic. Anywhere it would have to go to idle frequently. Either add a knock sensor or get a P39 (or a chipped ECU setup for an F22B)

 

where would i get that nut and doesn't jb weld melt??