My kits include olives. Always have
has anyone seen or used R&D's billet fuel return rails? seems promising?, i'm having air intrusions as well.
Because it doesn't matter at all. The entire return side of the system can be empty of fuel for all that it matters - let it drain to the tank!How can that work when you have that return line going down the rear of the engine to the tanks? That is a major highway for the fuel to return to the tanks if air gets in somewhere.
Because it doesn't matter at all. The entire return side of the system can be empty of fuel for all that it matters - let it drain to the tank!
The /only thing/ that matters is that the /supply/ side stays full of fuel. That is, from the tank, through the filter, to the IP.
Now, what usually happens is that you get a leak somewhere high in the system - maby at the return caps.
Gravity will pull the fuel downward on the supply side(and back to tank) if there isn't something preventing it - either a check-valve, or a vacuum being drawn from the return side(remember - for fuel to flow back, something has to replace it).
This is why a check valve works wonders - you get a break in the return line somewhere, break the vacuum, fuel tries to flow backwards to the tank... and stops due to the check valve.
The fuel /before/ the check valve does the same thing - to "fall" back to the tank, it would need something to replace it and just won't(unless you had another leak at the check valve inlet).
edit:
To visualize this better, think about a straw and a glass of water. You can dip the straw into the glass of water, put your finger over the top, and pull it out of the glass... the straw stays full of water!
Why? Because your finger is acting like a check-valve, preventing the water in the straw from falling. Pull your finger away from the top, letting air in... and suddenly it all falls down and out of the straw.
Flow does not go freely to the return if there is pressure on the supply side. I’ve had a check valve on my supply side for years and my fuel system will hold 5 psi for days. This is because there is a small pressure relief valve on the top cover of the ip that is designed to hold some fuel pressure inside the top of the ip. When you add a check valve they work together to hold pressure in the system without drain back.
Because if air can replace the fluid in the lines then it will drain back to tank, if it is sealed it won’t. The injectors are past the ip, and there is no factory check valve on the supply side. If there was then you wouldn’t be able to blow through the line back to the tank.If all this is true, then why does a small air leak at one of the o-rings at the injectors drain all the fuel down? I don't know where it is, but there is a factory check valve somewhere on the supply side originally if I recall.
I bought a set a year ago, didnt work at all. Installation is a pain and the locations of the ports are nearly impossible to get fuel lines on
I got the cheapest version and made my own lines but no, did not work at all. Maybe he has found a different machinest since then but the machine work was pretty poor imo.sorry to thread hijack, but you mean to tell me, they cost 360$ and they do not work? thats insane.