Lift pump?

[icanfixall]

An electric pump will purge the fuel system when you change filters much easier and... If you or another dingbat run the rig out of fuel... (Like the wifey did last week)...... It will purge the lines so much faster. That alone will save the starter and batteries.... Much cheaper in the long run to have an electric lift pump....

 

[hesutton]

What Gary said. Having one IDI with the stock mech. pump and one with an electric pump. It is sooo much nicer to do maintainance/work on the fuel system with an electric pump. There is no performance gain, but it has me completely spoiled when bleeding/testing/maintaining the fuel sytem.

The crew cab is getting an electric pump during it's headgasket, turbo, stud, ZF5 swap project that I've started as well. Then I'll be mechanical pump free.

Heath

 

[HammerDown]

Hmmm, since 1988 I've never had any drama with the OE mechanical lift pump. After a decade+ the original started to weep and I replaced it > never leaving me stranded.
When I change the fuel filter I pre fill it with fuel. If I've lost the prime from lets say bad return o-rings, depressing the schrader valve and few simple short cranks and it lights off.

I'm sure not trying to talk anyone out of a electric lift pump but > how many people here have got 198,000 miles and 22 years outta two Hollies?

Again, if and when the lobe that drives the OE type pump goes away I'll have no choice but to change over until then > why fix a proven/reliable setup.

 

[DOE-SST]

Sooooo,

What are you using for an electrical pump, pros/cons, where did you mount it, and total cost?

I bought one from NAPA years ago for a test rig, and it lasted around three months.

 

[SparkandFire]

IMHO, The difference is night and day! I'll never go back to the mechanical pump again. For me, it was like compairing a steak at the Sizzler to a steak at Mancy's Steakhouse. Once you try a Mancy's steak, you just can't go back to the Sizzler.

Heath

Kinda like The Laurel supper club in New Richmond, WI...

Life will never be the same again.

I love the electric pump in the new truck, helped me get the last couple gallons of red diesel out of the rear tank so "the man" won't hassle me if I get pulled over!

 

[Agnem]

Another big feature of the electric pump that I like is the rate and presure of fuel flow is constant. It varies with the engine RPM with a mechanical pump. This allows the IP timing curve to be more acurately followed. Remember, fuel presure affects timing, and there is no way to account for this when calbrating, so a constant fuel presure will yeild the best results.

 

[jam sandwich]

All this talk about an electronic lift pump has me thinking...
Are there any write-ups out there outlining an install?
Is there any automation to running it (ie is it run via a manual switch or with the car's ignition?)

 

[HammerDown]

Another big feature of the electric pump that I like is the rate and presure of fuel flow is constant. It varies with the engine RPM with a mechanical pump. This allows the IP timing curve to be more acurately followed. Remember, fuel presure affects timing, and there is no way to account for this when calbrating, so a constant fuel presure will yeild the best results.

I would be concerned if the pressure out of the IP was fluctuating/weak but, I'm not seeing how a veeeeerry slight psi drop/fluctuation to the IP could be a problem > as long as it's not dropping off enough to NOT meet demand.
Pressure is good, too much is bad too little will cause a problem. Only way to tell is with a gauge.

My 468 BBC Jet Boat holds 5-7 lbs @ 5,400 RPM(same at idle) on a mechanical fuel pump. It would not behoove my engine one bit if it had a constant 10 lbs that it couldn't use > as long as it's meeting the demand of the carb/engine/IP

Again, a fuel psi gauge is your best friend...anything can lose enough pressure to be a issue.

BTW...years back my neighbors 98 Dodge/Ram Cummins w/only 28,000 miles on it burned up its IP $$$ because the "electric" lift pump was failing.
I told my neighbor now that it's fixed install a fuel psi gauge > he NEVER did and it's acting up again now because of the electric fuel pump.