Horray! Took the Dak back out to the Ram Off Road Park for its last-and-final heat-soak test, and the newly re-designed fuel system passed with flying colors - no fuel system/pressure/vapor-locking issues at all 👍 .
The surge tank is now located under the bed -
So, the main tank supplies low-pressure fuel to a surge tank, and the surge tank contains the fuel for the high-pressure EFI system. The main tank supplies fuel to the surge tank via a basic low-pressure 4.5 gph/30 psi fuel pump, and that return side now has a simple but very effective 'sight gauge' (a 5/16 fuel filter), which...if it's full then so is the surge tank, which is exactly what I want. If it's not full then neither is the surge tank, and that's bad, so the little fuel filter is my quick-visual-reference to ensure 'all is well'. The angle with the below pic is without the shield in place to protect the surge tank and plumbing from rocks and road debris, and I can 'peek' at the filter between the cab and bed - works awesome.
All the fuel lines are now 5/16". The two high-pressure fuel lines are now the only fuel lines going up into the engine bay, and both lines are double insulated - first with DEI 3/8 Vapor Lock insulation wrap, and then again with 1/2 heat sleeve, all secured in place with clamps and plastic blocks to keep the lines away from the frame and firewall (a black cutting board works great for making 'spacers', btw) -
And it wasn't just me out at RORP - at 0730 that morning I'm out at the barn loading up the Dak and I hear "Hi Dad" coming from my 5yr-old :) - she wandered out and found me, and asked 'what are you doing'?, and I said I'm taking the truck out to the off-road park for a test, and she asked 'can I go with you'?, and I thought about it and said 'sure'!...but as I thought about it some more I thought...maybe we can all go - asked the wife and sure enough we packed up everyone in both the Dak and the wife's new trail machine; we just picked up a really nice 08 Wrangler JKU, and between it an the Dak we were able to very comfortably bring the whole family, including the 5, 3, and 2 yr-old's, and we all had a genuine blast. The 2 and 3 yr-old's rode with mom in her new Jeep, and the oldest rode with me in the Dak, and it was the very first time the whole family wheeled a trail together...and I gotta say it was absolutely delightful :) . The whole point of being in this silly sport has always been to have the whole family infected...I mean influenced by extraordinary fun that comes from this silly sport, and so far the evil plan is working! :)
Sadly, one of our club members owned/built up this JKU, and he had very tragically passed away, and long story short his Jeep became available, and as it turns out we were simply at the right place at the right time, and we were able to pick up the Jeep at a good price. I am really happy that I don't have to spend years building it up - it's already 'there', and it is nearly exactly what we would have built for the wife, and she loves it. It's an '08 JKU, not a Rubicon (no loss there), with a Dynatrac ProRock 44 front and a ProRock 60 rear (with 5.13s...
and ARBs - yuck...), on 37s, and a full host of armor. We're intending to swap out the ARB's for Grizzlys asap, but other than a base unit GMRS radio that'll probably about the only thing we'll change...potentially for a long time. Meanwhile, pics -