SnowDrift
Ultra Conservative. ULTRA!
Is the Walbro an advantage due to fuel ability to flow through if the pump fails, vs. the air dog style of pump not allowing fuel to flow if it fails? I seem to recall a conversation about this in the past.
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Walbro vs. Air Dog type pump
- Thread starter SnowDrift
- Start date
btfarm
America First!
I was pretty sure Airdog is flow on fail
By AirDog do you mean Raptor 100? Seems to me it was FOF. IMO its to much pump for 90% of the 6.5s. A Walbro cost less and will support most 6.5s
IMO you need a better way to power "any" LP on our trucks, such as my LP relay harness or make your own.
IMO you need a better way to power "any" LP on our trucks, such as my LP relay harness or make your own.
SnowDrift
Ultra Conservative. ULTRA!
I'm not sure if it was a Raptor or not. Maybe. I have specs for that pump at work, since we use one for one of our engines - I'll have to look at it.
Incidentally - not complaining about the pump you sent.
Thanks!
Incidentally - not complaining about the pump you sent.
Thanks!
Paveltolz
Доверяй, но проверяй
I have run both pump on my rig and the Air Dog DF-165 does flow on fail. I had issues with the relay cutting out due to heat in the engine bay (location location location) and still flowed fuel as the truck still ran, started from stop etc. I replaced the kit unit with an aftermarket relay set up from Waytek Wire Solutions.
Leroy is correct though, the Walbro provides sufficient fuel pressure for our needs. I wouldn't be using the Air Dog were it not gifted to me, rather, still running the Walbro from Leroy with the filtering kit.
Leroy is correct though, the Walbro provides sufficient fuel pressure for our needs. I wouldn't be using the Air Dog were it not gifted to me, rather, still running the Walbro from Leroy with the filtering kit.
JayTheCPA
Well-Known Member
With the Walbro, lowest psi I see during WOT is 2 (at the IP inlet) and scuttlebutt is that is plenty for the 6.5.
SnowDrift
Ultra Conservative. ULTRA!
Demonstration video I came across.
ak diesel driver
6.5 driver
I believe that's why the return line goes to the bottom of the tank to minimize the amount of air it entrains into the fuel in the tank.
SmithvilleD
Active Member
The video is compelling & the way the fuel is poured into the "tank" does ensure some air/diesel mixing. I wonder if the degree of vacuum the stock fuel cap venting mechanism allows... relates to helping entrained air to outgas?
I don't think any 6.5 is going to return that much fuel! That was like a garden hose. We get more of a trickle and like AK said through return at bottom of tank. I bet there are more air bubbles from sloshing around than anything else on a 6.5 and still not enough to worry about IMO.
What automotive system is going to return that much fuel like in the video?
What automotive system is going to return that much fuel like in the video?
SnowDrift
Ultra Conservative. ULTRA!
While extreme, possibly, in the demonstration, it does allow for the question of just how much air does become encased in the fuel from the sloshing. To that, I wonder if having a prefilter, just before the pump would make a difference for that reason alone? I realize some of the suggestions have been to prefilter and there are several that do, but could this point to another piece of supporting information as to why it's important (and possibly even necessary)?