Fuel restriction w/ 6an line?
So theatricality tell me what's the pressure flowing through the 6an line?
I have no idea really, I'm sure there is a way to calculate it but I'm not sure how.
The question arises though because you are adding a smaller line
after the liquid has already been regulated to a certain psi. I'm not saying that this will happen but based on physics as I understand them, you will see an increase in pressure at the point of the step down, however much it is. Could be negligible, could be a couple psi, could be a lot.
Think about it - 9/16 tubing (-10) has almost double the area of 3/8 (-6) tubing for any given length. Basic physics says liquid can not be compressed therefore it has to go somewhere. Forcing a larger volume of liquid into a smaller hole HAS to change pressure. To what extent or percentage again, I don't really know. It has to be something though and will be higher than what you have coming off the regulator.
That's why you need the gauge after the step to ensure the pressure is not altered further from what you think it's supposed to be.
Sorry to be so long winded, hope that helps.
