IDIBRONCO
IDIBRONCO
That sounds like quite the adventure.
So what did you do with your truck today?
- Thread starter GOOSE
- Start date
tbowker
Full Access Member
I have a sister and a bunch of niece's and nephew's in Fruitland. A cousin who's not far from Cheyenne. You're doing what would be my family tour. Admirable road trip.
IDIBRONCO
IDIBRONCO
Funny you should mention Fernley. I got a kind of job offer from there Wednesday. He that he was joking around, but the way that he said it, I kind of wonder if he's having trouble finding and/or keeping help. I wouldn't take it anyway.
Depends on where you have your vacuum tapped at. If you have a vac canister, the check valve retains vacuum. If you tapped into the vacuum manifold, when you key off it instantly goes away. The brake booster keeps some vacuum because it has a check valve on it.
IDIBRONCO
IDIBRONCO
Mine does. I have it tapped in around the same spot. I'll guess that it probably takes maybe 5 minutes. I haven't timed it. I had one pump that it might have taken a minute to drop to 0 after the engine was shut off. That one would only build a max of 17" on my gauge, but that was enough to work the power brakes just fine. My gauge is a cheap one and it may not be really accurate. It could read a few inches off.
DougBoy66
Registered User
Working on gettin his game face on
You must be registered for see images attach
You must be registered for see images attach
I think I might have found the maximum capability of the stock mechanical lift pump… I have 5 psi of fuel pressure at idle but have about a quarter to half inch of vacuum when I really get on it in higher RPMs. That’s measured at the filter head.
I found this out when I turned up my pump again (Moose Junior, 90cc?). I put 3 flats to it a while back, seemed barely better. So I put another 3 to it today. Noticed zero difference at all. Maybe a touch more smoke before it lit off. Timing set at 5* currently.
I plan on putting a Walbro FRB-13 on sometime this week, and deleting the mechanical pump. That might not quite cut it, but I’ll give it a try.
I called the folks at Walbro, it seems that I can stack the pumps if needed. I might wind up doing that, but I’ll just start with one pump. They can be pushed or pulled through, so having a second pump on a switch for when you need it is an option. They are auto regulating pumps, only cycle as needed. If it holds at the desired pressure then it will just stop pumping until it is out of the range it seeks, then it resumes. I think it can bleed back through itself but it’s self priming anyways so it will probably work great. Should be nice for priming a new fuel filter. The pump has an 18,000 hour service life, and is made in the USA.
Hopefully I have better luck than with the Holley pumps that I kept going through in my 86.
I found this out when I turned up my pump again (Moose Junior, 90cc?). I put 3 flats to it a while back, seemed barely better. So I put another 3 to it today. Noticed zero difference at all. Maybe a touch more smoke before it lit off. Timing set at 5* currently.
I plan on putting a Walbro FRB-13 on sometime this week, and deleting the mechanical pump. That might not quite cut it, but I’ll give it a try.
I called the folks at Walbro, it seems that I can stack the pumps if needed. I might wind up doing that, but I’ll just start with one pump. They can be pushed or pulled through, so having a second pump on a switch for when you need it is an option. They are auto regulating pumps, only cycle as needed. If it holds at the desired pressure then it will just stop pumping until it is out of the range it seeks, then it resumes. I think it can bleed back through itself but it’s self priming anyways so it will probably work great. Should be nice for priming a new fuel filter. The pump has an 18,000 hour service life, and is made in the USA.
Hopefully I have better luck than with the Holley pumps that I kept going through in my 86.
The_Josh_Bear
Full Access Member
Could it be a fuel filter restriction? If you have a low micron fuel filter(<10) that could be it.
I agree that if you're turning up the IP with no real power difference then something is amiss on the fuel supply side, and vacuum is no good! My mechanical lift pump works well with a maxed out stocker IP.
I think the way to go if you need two is side-by-side, as in parallel. Think of two box fans pushing air in the same direction. Side-by-side they push about twice as much. But tape them together or put them in a tunnel the same size as they are and they might flow 5% more air. The one thing they will do is blow that 105% more air with more torque, but max FLOW won't be much more than a single. Point is if 46gph isn't enough then adding another in series still won't go past 46gph.
Yeah really! There's a lot of Holley corpses around these parts...
rreegg
Full Access Member
Not sure if this was responded to or not but I haul 1500-2k in the bed all the time with no problems. obviously axle/tire/chassis ratings all come into play at some point
DougBoy66
Registered User
With a high an' canvas-covered load no doubt
I changed it after making that post, no difference, so I doubt that’s the issue. I had put a new filter on when I put the Moose IP in, for what that’s worth.
I don’t know what Moose does to their pumps, but I’m going with I am probably not getting enough fuel.
I just put new fuel lines on, and a manual selector valve, so that’s probably not the issue either.
No idea how old the current mechanical pump is, truck has very low miles, it could be original.
When I originally put the Moose Pump in a couple thousand miles ago, I was getting 5 psi at idle and 2 psi at 3k rpms given er all the way. That was with a fresh filter.
That’s true, I would just have to made a manifold of some sort. Or just fuel hose and Ts…
Many aftermarket fuel systems for the 7.3 and 6.0 PSDs use e pumps in series, so that’s mostly what I drew my inspiration from.
Good to hear everyone else’s take on it, lots of good ideas out there.
I haven’t had much experience with the Facets, a friend of mine had one on his truck, it never gave him any problems, he sold it and bought a PSD. I think I have a Facet somewhere in a box maybe, but the Holleys I had were always leaking…
One more thing to add, the diesel clattering is quieter now at high rpms than it was before I last turned up the fuel.
I feel as though I can keep adding fuel, in 100* both EGTs and ECT stay very safe. Towing 17k lbs in 90* the highest EGTs I saw were 1050* at the top of a very long and steep hill south of Manhattan Kansas, water temp hit 204* there too. That was after 3 flats on the Moose Junior. So adding 3 more, would be interesting to see where everything sits then.
Being able to pull that kind of weight at reasonably high speeds without temperature management issues is awesome. It takes quite a bit to get these IDIs to do it, but they can, if you spend the money on them. I still think it was worth doing.
Definitely stress testing stuff though… lol
Last edited:
