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Old 11-29-2016, 01:37 AM   #1
240Toast
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Default 740 Under Car Pump Delete

Hello everyone!
I thought this might be something a lot of people are interested in, so I figured I'd start a thread on it.

I put an Airtex E2366 in my tank and deleted the under car pump, and replaced it with a simple in line fuel filter, but it would seem the filter is a bit too restrictive, as it has blown lines off twice now.

To those who have deleted the under car pump, what did you put in it's place? I've been told some just run it straight through to the rail, but that leaves me with no filter at all. Not a big fan of that idea. If you used a filter, what filter was it?

Thanks!
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Old 11-29-2016, 02:01 AM   #2
AMilli96
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I know this might not help much, but I had that same pump in my 740 with the OEM filter and it didn't blow off lines. I used a 5/16 multiple barbed, barb fitting that screwed into the inlet of the filter and I double clamped it with fuel injection hose clamps. I haven't had an issues. The Airtex pump failed, so I used the Rex/Regina pump and now working perfectly.
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Old 11-29-2016, 08:14 AM   #3
eabras
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I'm about to do the same. Stuck a walbro gss341 in the tank and I'm just going to get m14x1,5 and m12x1,5 barbs to connect the original filter. Haven't measured it yet, but I believe the original feed line from the tank is 12mm, so a reducer is needed before the stock filter.

Planning on using proper fuel injection hose and "fuel injection" hose clamps
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Old 11-29-2016, 10:31 AM   #4
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The stock filter works fine.
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Old 11-29-2016, 04:37 PM   #5
240Toast
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Quote:
Originally Posted by eabras View Post
I'm about to do the same. Stuck a walbro gss341 in the tank and I'm just going to get m14x1,5 and m12x1,5 barbs to connect the original filter. Haven't measured it yet, but I believe the original feed line from the tank is 12mm, so a reducer is needed before the stock filter.

Planning on using proper fuel injection hose and "fuel injection" hose clamps
Well, good to know those thread pitches on the stock filter, I guess I was over thinking it!
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Old 11-29-2016, 09:13 PM   #6
Marvelous3
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Using a stock 240 filter. No problems.
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Old 11-30-2016, 07:43 AM   #7
DET17
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Quote:
Originally Posted by eabras View Post
Planning on using proper fuel injection hose and "fuel injection" hose clamps
This. Line from tank pump to undercarriage pump is rated for around 10 psi, not what you are about to subject it to. Don't forget the amperage for said pump intank.... stock wiring won't come close to handling the amperage for a 3~4 bar Walbro, et al.
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Old 11-30-2016, 10:10 AM   #8
eabras
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Of course bigger wiring from the battery is needed. Use the stock wiring to control a relay, with the new wiring actually supplying power to the pump.
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Old 11-30-2016, 02:35 PM   #9
Steve Zissou
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Quote:
Originally Posted by 240Toast View Post
Hello everyone!
I thought this might be something a lot of people are interested in, so I figured I'd start a thread on it.

I put an Airtex E2366 in my tank and deleted the under car pump, and replaced it with a simple in line fuel filter, but it would seem the filter is a bit too restrictive, as it has blown lines off twice now.

To those who have deleted the under car pump, what did you put in it's place? I've been told some just run it straight through to the rail, but that leaves me with no filter at all. Not a big fan of that idea. If you used a filter, what filter was it?

Thanks!
oem filter and check valve

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Old 11-30-2016, 03:01 PM   #10
tequila_gundam_no_chaser
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Find a Regina 940 and use the pump/filter setup from that. Those cars only ran one pump and the whole system will bolt up to your car with no problem. Ran one for years on my walbro'd holseted 940
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