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Bill, one of the concepts that I'm trying to understand is the idea of "all that fuel." I don't think we're burning a tenth of a gpm of fuel, hardly much flow and there shouldn't be enough velocity to create much of a pressure drop at all. That may be a tiny hole, but the required flow is pretty tiny too.
I'm new here and not trying to start a pi****g contest, just want to understand this.
They use more than you think. I had a new stock pump,shimmed regulator and zero leaks. It held 75@ idle. After a 50 hp chip my pressure on wot hard pulls would dip to 30 psi. That is with stock stix. The 1/8" npt inlets are tiny and the banjo bolt transition in the head is restrictive. Those fittings and that system would be awesome but I think that's more Travis size system. Maybe once I get a trans and can open mine up I will need more flow....
I did not use standard fittings tho as shipped. All orifices were ported so maybe that's helping. Idk
Not saying that flow doesn't drop off at WOT or even medium throttle. I'm just not convinced that it's pressure drop through the fittings that causes it. I think it may be more like just not enough capacity pump (pump can't supply the demand even if there was no pressure loss in the fittings). The stock pumps don't know if the truck is accelerating and needing more fuel, or cruising at a steady RPM, they just plug along at their rated output.
I'm as guilty as anyone in making assumptions and not backing them up with any real test measurements. I'd sure like to see some real measurements taken before and after fittings and fuel lines were upgraded. I have the same plan to do some tests with before and after exhaust system mods, but I've had those plans for two years now and haven't done anything.
Not saying that flow doesn't drop off at WOT or even medium throttle. I'm just not convinced that it's pressure drop through the fittings that causes it. I think it may be more like just not enough capacity pump (pump can't supply the demand even if there was no pressure loss in the fittings). The stock pumps don't know if the truck is accelerating and needing more fuel, or cruising at a steady RPM, they just plug along at their rated output.
I'm as guilty as anyone in making assumptions and not backing them up with any real test measurements. I'd sure like to see some real measurements taken before and after fittings and fuel lines were upgraded. I have the same plan to do some tests with before and after exhaust system mods, but I've had those plans for two years now and haven't done anything.
Honestly it doesn't matter to me. I replaced everything but the hard lines and it made 5 more psi of boost back then and held pressure. Now it makes 50+ psi and overpowers the trans...that's my current focus lol
Well here's what I ended up doing used the fass fuel pump bracket and mounted you bracket to it and wired in but I need to redue my supply line as I made it to short and bed is squeezing line
Well guys I still don't have a fuel pressure guage but I'm pretty sure my pump is taking a crap pressure was little low last time I checked it but anyway I'm wanting to either run the Bosch 044 or walbro pump but I'm still running stock pickup and I saw the irate efuel kit comes with a draw straw but anyway what I was getting at is that should I go ahead and get a draw straw or a sump I'm wanting everything to look nice and clean also I'm pretty sure my factory pick up fell off as my truck starts to run out of fuel at 1/4 tank thanks guys for the help In advance
Here's a link to the hutch mod to possibly fix your problem running out of fuel at a quarter tank. The little shower head thingy may have fallen off your pick up tube.
As far as the pressure issue; how are you adjusting the pressure on the regulated return from the front of the cylinder heads? Reading through this thread I don't see that addressed.
I've done the tightwad mod for now which I've been running for probably 20,000 miles no issues there I'm really thinking it's weak pump or stoped up filter which the filters only have 2,200 miles on them just changed them
Got it. Just did some reading on the tightwad mod, pretty cool. I would double check your fuel lines to ensure there are no points where it is being squeezed enough to restrict flow, and drain some fuel from the first filter in line from the fuel tank. Wish I could be of more help. Hopefully someone else with this mod can help you out.
I visually looked it over just the other day when I drained first filter everything looked fine the pump was used when I got it so probably on the craps oh well I'm gonna get my intake plenums resealed and probably buy a pump soon and drop tank and fix
Well I decided I'm going to order a walbro pump and a sump already found a sump I like and it comes with the hole saw to drill hole I'm going to order stuff and I'll let u guys know how it works out
