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not that this has any merrit to this discussion .....i ran clear fuel line on my turbo busa fuel system i purchased from speeway motors. i only did so as i wanted to watch for air bubbles. the interesting part was i saw none in the feed line nor the return line to the RR reg. however from the RR reg to the tank i always saw a few small one while running. i had no issues with that system so i never investigated why and chalked it up to the rcc's modified 12 to one reg but i did notice when we made the trek to st a that it was off by 3 psi at idle. i adjusted ( raised psi )and once home it was again off by 3 psi so i adjusted back down. i was using the aem 320 lph in tank pump. which brings me to another question you commented on earlier fabbr.....you said it was/is believed that intank location was for cooling but infact it was for a better pick up location to ease strain of draw on inlet side of pump. It is for both pump cooling and putting/keeping positive pressure on the fuel inlet to pump as opposed to the negative pressure that occurs by sucking fuel to an external pump. The negative pressure sucking fuel to the pump is what causes pump cavitation and/or vapor lock.the fuel running though it actually cools the pump. now your new desert set up you built the pump cradle for ...do those pumps sit at the bottom of the tank or half way down or such?As close to the bottom of tank as possible to keep the pump inlets under positive feed pressure as long as possible. i am sure you used that new mat in the bottom of the tank. i don't remember now if you went direct into the tank or a second tank for the pumps.No second tank. I did not use Holley Hydramat due to the $600 price for the size I would need to actually have the Hydramat do what it is supposed to do. At this time I am using the inlet filters as supplied with the pumps. .