300tdi lift pump pressure - Defender Source
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Old November 27th, 2013, 01:54 PM
Surfin' Elvis
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Chuck
95 RRC 300tdi/wvo conversion
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300tdi lift pump pressure

I run a 2-tank diesel/WVO fuel system and have been through three Facet electric pumps in three years. While still a cheap way to go, considering I drive nearly for free, I have decided to upgrade my electric lift pump to a Walbro FRB-5.
It is rated for 8-11psi.
Is this too much pressure to send to the IP?
Also, since I loop my return fuel back to the IP when on WVO (to retain as much heat as possible in the WVO), at what pressure does the IP return fuel? I ask this because, since I am returning fuel from return port of the IP back to the inlet of the IP, I know the IP inlet can handle at least the return pressure from the IP.
Thanks in advance.
By the way, if anyone wants to know why I do not use the stock mechanical lift pump, my reason is that I am not certain the diaghram can handle the fatty acids in the WVO as I had a new one fail in less than 6 months. It was a pain to access. Roadside repairs are much easier when you only need to access the inner fenderwell rather than the lower back end of an engine block!
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  #2  
Old November 27th, 2013, 02:06 PM
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Red90
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John B.
1991 Defender 90, 200TDI
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The manual says the stock pump is 3 to 4 psi. The return line should loop back to the lift pump inlet, IMO, and not be under pressure.
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Old November 27th, 2013, 02:53 PM
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rdavisinva
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Robert Davis
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Quote:
Originally Posted by Surfin' Elvis View Post
I run a 2-tank diesel/WVO fuel system and have been through three Facet electric pumps in three years... Roadside repairs are much easier when you only need to access the inner fenderwell rather than the lower back end of an engine block!
Chuck:
If you want to call I can answer all your questions.
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