Adjustable Fuel Reg Problems.

[GTSBoy]

Well, if anything it sounds like a response speed issue with the reg. The reg should be able to change its opening fast enough to stop large over/undershoots of pressure. If the over/undershoots are really short duration, then it's probably not a problem. But if they go on for an extended time (like seconds) then it could cause you tuning/driving issues and might warrant a replacement, or at least an experimental swappsies.

[DanielH]

I've done the experimental swapsy, while it is "spiking" it's not actually going up to the correct pressure, which without doing further testing leads me to believe I have a supply flow issue.

The fuel connectors "were" the issue, now they're drilled out its fine, I can drop it to 40psi, but I'm just running it higher cause at around 70psi on full boost I'm getting good duty cycles on my injectors.

If I can sort the issue I'd like to run around 45/50 base pressure with a proper 1:1 increase with boost pressure and it will be perfect!