Will Pusher Pump Cavitate Tank Pump
#1
Will Pusher Pump Cavitate Tank Pump
I've got a 2002 SO CTD with a intank pump retrofit from the Dodge dealer. My fuel pressure @ idle is 7-8 # and can drop down to as low as 2-3# depending on how hard I am driving it. My question is will a pusher pump cavitate my in the tank pump.
Thanks, Ronnie
Thanks, Ronnie
#2
Registered User
Join Date: Aug 2005
Location: Airdrie, Alberta
Posts: 7,780
Likes: 0
Received 0 Likes
on
0 Posts
It would actually be the otherway around, the intank would cavitate the 'pusher' pump. If the pusher is rated at a greater flow than the intank, it would definitely be better to bypass the in tank setup with a draw straw.
#3
Registered User
Sounds strange. I don't think anything can cavitate the intank pump, simply because there is no restriction on its intake, no line of any significant length. Like Tare said though, if intank pump is much smaller flow rating, it may be a restriction on the pusher suction line. If they are similar, I would think all should be Ok.
-P
-P
#4
Registered User
Join Date: Sep 2003
Location: Plano, TX
Posts: 2,534
Likes: 0
Received 0 Likes
on
0 Posts
Many have tried to pull through the in-tank pump running and not running with our pumps. AND it simply does not work. Too much restriction can cause cavitation in the stronger up stream pump and it will eat the gear base up (in our pump design at least). Any aftermarket pump that is designed to be the sole pump on the truck works best with its own free flowing pickup. Any of our pumps will walk away from the in-tank pump so i see restriction issues there.
Now the flip side to this is to put the pump that can move the most amt of fuel closest to the tank and feed the pump that moves the least. An example of this is our 1009 12 valve kits. We feed the mechanical pump in that setup. This just gives head pressure to the pump so it can do its job easier.
Now the flip side to this is to put the pump that can move the most amt of fuel closest to the tank and feed the pump that moves the least. An example of this is our 1009 12 valve kits. We feed the mechanical pump in that setup. This just gives head pressure to the pump so it can do its job easier.
#5
Registered User
I keep seeing the in-tank Walbro pumps that are similar to the popular GSL392 in performance, yet cheaper. I wonder if anyone tried these in a truck like ours. Some of them are 255 lph and 80 psi, pretty impressive, so you still would want a separate bypass line for that, looks like.
-P
-P
#6
Registered User
Join Date: Apr 2005
Location: Northport, Wa
Posts: 279
Likes: 0
Received 0 Likes
on
0 Posts
Unless you are going to get rid of the intank pump you might install a big line kit instead of a another pump upstream. It's a good idea to get rid of the restrictions in the fuel system no matter what pump you are running.
#7
Registered User
Join Date: Apr 2005
Location: Northport, Wa
Posts: 279
Likes: 0
Received 0 Likes
on
0 Posts
I keep seeing the in-tank Walbro pumps that are similar to the popular GSL392 in performance, yet cheaper. I wonder if anyone tried these in a truck like ours. Some of them are 255 lph and 80 psi, pretty impressive, so you still would want a separate bypass line for that, looks like.
-P
-P
Thread
Thread Starter
Forum
Replies
Last Post
John_P
3rd Gen High Performance and Accessories (5.9L Only)
68
12-02-2011 10:22 AM
yarddog
24 Valve Engine and Drivetrain
1
11-10-2005 05:23 AM
midwestdually
24 Valve Engine and Drivetrain
15
12-17-2004 08:52 PM