I'm needing to get a fuel regulator for my jenvey set up on my C20XE.

Should I be looking for an adjustable regulator with gauge or a 3.5bar fixed regulator ?

some previous discussion link advantage of adjustable is ability to change pressure to compensate for size of injectors or later tuning if nearing the max injector flow, but ultimately adjustable one not a necessity and be one less thing to go wrong, just need to review expected power, injector flow rates to get a regulator in the right pressure