Following wuth interest whitie, I am keen to do as long as there is an improvement of some sort
Zappa
Zappa
Lift pump install
4
08-01-2008 (To follow the original thread, click on the 08-01-2008 and then click on the underlined "fuel pump issue" at the top right of the post.). I will use Post 3 of this thread to provide the update.
Hi all, Chaz and I have been working on slightly different setups for the lift pump mod, Chaz has kindly provided pictures of his handy work in another thread and on his website under the Fuel System link.
Here are the pictures for my end of the test setup using the Facet pump that I had purchased previously to overcome my fuel filter priming problems:
New inline 3amp fuse to battery.
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I ended up hooking the relay up to the wiper via a 5 pin relay that had 2 pin 87's and a three way switch (on1-off-on2).
I hooked up the three way switch to the active of the relay, this way I can have it "on1" for normal relay controller operation, "off" to check the vacuum on the line and "on2" to bypass the relay (via the second pin 87) and prime the the fuel filter.
Switch shown set to "normal" (use relay) position.
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The solid hose goes to the outlet of the Facet, the hose to the right (cable tied) is the original with a straight through barb to the inlet of the Facet.
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Pump installed on the drivers side of the petrol tank's bash plate.
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The VP44 is supposed to be a positive dispacement pump but it seems that it can - to a small degree - also control the amount of fuel that it is given.
With the motor off, the pump will pressurise to 5psi.
With the motor on, it will idle at between 1-2psi.
Normal driving, it drops to 0-1psi.
Heavy load, the pump goes into "draw mode" to help out the Facet and the line gets vacuum to 1Hg (compared to 5Hg without the Facet).
The motor seems to have more power and the EGT's have come down a bit (Chaz has noticed a 15-25c difference), I am guessing this is due to less aeration of the fuel.
I will update the post when I have completed the install with the final lift pump configuration (dual Facets - Walbro or Holley Red).
Cheers,
Whitie
Hi all, Chaz and I have been working on slightly different setups for the lift pump mod, Chaz has kindly provided pictures of his handy work in another thread and on his website under the Fuel System link.
Here are the pictures for my end of the test setup using the Facet pump that I had purchased previously to overcome my fuel filter priming problems:
New inline 3amp fuse to battery.
I ended up hooking the relay up to the wiper via a 5 pin relay that had 2 pin 87's and a three way switch (on1-off-on2).
I hooked up the three way switch to the active of the relay, this way I can have it "on1" for normal relay controller operation, "off" to check the vacuum on the line and "on2" to bypass the relay (via the second pin 87) and prime the the fuel filter.
Switch shown set to "normal" (use relay) position.
The solid hose goes to the outlet of the Facet, the hose to the right (cable tied) is the original with a straight through barb to the inlet of the Facet.
Pump installed on the drivers side of the petrol tank's bash plate.
The VP44 is supposed to be a positive dispacement pump but it seems that it can - to a small degree - also control the amount of fuel that it is given.
With the motor off, the pump will pressurise to 5psi.
With the motor on, it will idle at between 1-2psi.
Normal driving, it drops to 0-1psi.
Heavy load, the pump goes into "draw mode" to help out the Facet and the line gets vacuum to 1Hg (compared to 5Hg without the Facet).
The motor seems to have more power and the EGT's have come down a bit (Chaz has noticed a 15-25c difference), I am guessing this is due to less aeration of the fuel.
I will update the post when I have completed the install with the final lift pump configuration (dual Facets - Walbro or Holley Red).
Cheers,
Whitie
1 - 20 of 40 Posts
6
Lift pump install update
OK, only been a year but after much deliberation, I took OldMavs advise and installed the Holley Red, I also took tweak'es advise and re-plumbed the spill return line - gotta love this forum :bigthumb:.
These are pictures of the spill return line being moved to the outlet side of the VP44. The main reason for me doing this was to keep the spill from being pressurised and also, by moving the spill I assume that the fuel temp inside the pump will also be reduced.
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This is a picture of the red which was installed on the drivers side of the tank. You can just make out a bit of the check valve installed across the red (brass bit around the top of the pump).
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Metal work again complements of my bother in-law Domenico (just add it to the tab ay :lol: )
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I tested the red for flow through when off and was surprised to find that depending on where the vanes stopped, it would provide varying degrees of resistance to flow so I installed a good quality check valve across it.
![]()
Updated results using the red:
With the motor off, the pump will pressurise to 6psi.
With the motor on, it will idle around 5psi.
Normal driving, it drops to 4-5psi.
Heavy load, it drops to 3psi (compared to 1Hg of vacuum with the Facet).
My butt dyno tells me that the red has flattened out the torque curve which was taking a nose dive from 1900rpm using the facet.
I am guesstimating my new setup to be pushing around the 150hp for my troubles, one day, I will have to get back on the dyno to see if I am right
Cheers,
Whitie
OK, only been a year but after much deliberation, I took OldMavs advise and installed the Holley Red, I also took tweak'es advise and re-plumbed the spill return line - gotta love this forum :bigthumb:.
These are pictures of the spill return line being moved to the outlet side of the VP44. The main reason for me doing this was to keep the spill from being pressurised and also, by moving the spill I assume that the fuel temp inside the pump will also be reduced.
This is a picture of the red which was installed on the drivers side of the tank. You can just make out a bit of the check valve installed across the red (brass bit around the top of the pump).
Metal work again complements of my bother in-law Domenico (just add it to the tab ay :lol: )
I tested the red for flow through when off and was surprised to find that depending on where the vanes stopped, it would provide varying degrees of resistance to flow so I installed a good quality check valve across it.
Updated results using the red:
With the motor off, the pump will pressurise to 6psi.
With the motor on, it will idle around 5psi.
Normal driving, it drops to 4-5psi.
Heavy load, it drops to 3psi (compared to 1Hg of vacuum with the Facet).
My butt dyno tells me that the red has flattened out the torque curve which was taking a nose dive from 1900rpm using the facet.
I am guesstimating my new setup to be pushing around the 150hp for my troubles, one day, I will have to get back on the dyno to see if I am right
Cheers,
Whitie
noisy at all ?
used to run a facet on a mini motor (i think) and at idle it used to tick rather loudly.
incidentally i ran into this pump ....http://www.summitracing.com/parts/MRG-12D/?image=large i think its a copy or bigger version of the later facet pumps. but 3/8 in/out and a much better 35 gph flow.
can't wait to see how the holley went
used to run a facet on a mini motor (i think) and at idle it used to tick rather loudly.
incidentally i ran into this pump ....http://www.summitracing.com/parts/MRG-12D/?image=large i think its a copy or bigger version of the later facet pumps. but 3/8 in/out and a much better 35 gph flow.
can't wait to see how the holley went
No worries Zappa, it will be worth your whileZAPPAGU said:
Very noisy tweak'e, but with the modded exhaust, the windows up and the radio on - what noise were we talking about??tweak'e said:
The 35 gph flow won't cut it for the mighty 3 ltr, it needs a real mans pump with 97 gph just like its big brother hehehe
Thanks Mick, you are right, it will keep the fuel line pressurised to 6psi with the ignition on.Skiman said:
This is not a problem unless the fuel line ruptures in the accident but then you also need to consider that diesel is less volatile than petrol anyway.
Tweak'e has kindly offered to look into this when he gets a chance so it will be good to see what he comes up with. I am always happy to have more safety built into the system :bigthumb:
Hi Dan, same as before, one or two drops an hour leaking onto the chassis.5upaMav said:
I am sure that the sedimenter can be made to hold the pressure but I am too chicken to torque the sealing bolt any more with that glass bowl sandwiched in between
I kinda like the rust proofing that the diesel is providing to the drivers side of the chassis anyway
:cheers:
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