Fuel Pumps Manual or Electronic ?
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I am considering mounting an inertia switch inside the cabin, perhaps on the back panel. It could serve both purposes there, a quick slap of the wrist would disconnect the electric pump and it would take a very knowledgeable thief to know that he/she has to press the rubber button to get the pump going.
Bill Williams
36/6725 S3 Coupe OGU108E Yellow over Black.
36/6725 S3 Coupe OGU108E Yellow over Black.
- billwill
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.. but you have just told everybody now.
Some light aircraft have both mechanical and electric pumps. The electric one is used to prime the engine before starting and for the more 'crucial' stages such as take offs and landings.. Only slight problem is that engine fires are not unknown if you over prime the engine!
Carl
Some light aircraft have both mechanical and electric pumps. The electric one is used to prime the engine before starting and for the more 'crucial' stages such as take offs and landings.. Only slight problem is that engine fires are not unknown if you over prime the engine!
Carl
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pereirac - Coveted Fifth Gear
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For me Mechanical Pump with glass dome as original. + Primer Bulb for when the car has not been used for a while so i can prime Carbs.
If you fit one of the replacement pumps with no glass dome they seem to produce too much pressure. So you need to fit a pressure regulator.
Alan
If you fit one of the replacement pumps with no glass dome they seem to produce too much pressure. So you need to fit a pressure regulator.
Alan
Alan.b Brittany 1972 elan sprint fhc Lagoon Blue 0460E
- alan.barker
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For whatever reason, my standard car won't run on modern alcohol laden fuels when it gets hot without an electric pump by the tank. I run both and have a regulator at about 1? lb/sq" just before the Webers.
Meg
26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
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Quart Meg Miles - Coveted Fifth Gear
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I use Facet (silver top) electric pumps on both the BD (Seven) and TwinCam (Elan) engines.
Both pumps have performed faultlessly for a total of over thirty years. Neither uses a fuel pressure regulator; the Elan has a driver accessible on/off switch. IMHO the advantage of quick electric fuel pressure outweighs the added complexity.
An option I certainly considered for the Elan was a primer 'bulb' to assist the engine driven pump but the familiarity and reliability of the Facet won the day.
Both pumps have performed faultlessly for a total of over thirty years. Neither uses a fuel pressure regulator; the Elan has a driver accessible on/off switch. IMHO the advantage of quick electric fuel pressure outweighs the added complexity.
An option I certainly considered for the Elan was a primer 'bulb' to assist the engine driven pump but the familiarity and reliability of the Facet won the day.
- 7skypilot
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Just a big Thanks to all of you that posted..
Our forum is something special..Great feedback.
Think the electronic is the way.. have had experience with them in other cars I have owned..MGA Twin Cam.
Currently use a pair in my 1934 Supercharged MGPA...and they are better in the boot pushing the fuel rather than in the engine bay sucking..
Will post another question next week on a new heading concerning this Elan I have purchased (why do I have a Floor mounted Dip switch incorporated in my wiring loom and also a steering column flick stalk for the headlights ??)..
Thanks again to all the help..
Cheers Ozi Swan
Our forum is something special..Great feedback.
Think the electronic is the way.. have had experience with them in other cars I have owned..MGA Twin Cam.
Currently use a pair in my 1934 Supercharged MGPA...and they are better in the boot pushing the fuel rather than in the engine bay sucking..
Will post another question next week on a new heading concerning this Elan I have purchased (why do I have a Floor mounted Dip switch incorporated in my wiring loom and also a steering column flick stalk for the headlights ??)..
Thanks again to all the help..
Cheers Ozi Swan
- Oziswan
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Oziswan wrote:
Will post another question next week on a new heading concerning this Elan I have purchased (why do I have a Floor mounted Dip switch incorporated in my wiring loom and also a steering column flick stalk for the headlights ??)..
Funny you mention this as I just recently saw the same exact thing (but my mind is blank at the moment to figure out where), but i noted the same floor switch on an Elan. My thought was a Super Safety federal requirement?? If i find it, I'll post the picture.
TED
"Driving a Lotus is a triumph of bravery over intelligence." Stirling Moss
"TaylorMadeClassicCars" on WWW and Facebook
"Driving a Lotus is a triumph of bravery over intelligence." Stirling Moss
"TaylorMadeClassicCars" on WWW and Facebook
- tedtaylor
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If you go electric go with the cylindrical Facet that Rohan mentioned. I believe they call it the "gold" pump. That design came from Bendix. I took one of those off of a friends junked MGB in about 1970. Before he had it on the MGB it was on an MGA. I fitted it to my MGB and a friend now owns that car. Pump is still going strong. They are indestructible or at least were when Bendix made them. Facet claims the same. That Bendix has way over 100K on it and 50 years.
Kurt
26/3754
Kurt
26/3754
- nomad
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I've wrestled with the issue of replacing the mechanical pump with an electric one, but only because I'm tired of having to top up the carbs with a dash of fuel before trying to start after prolonged non use. I've tried priming using one of those rubber hand priming pumps, which worked fine to start with, but is now as hard as the devil's toenails and thus useless. So I've decided to stick with the mechanical pump, but use a cheap electric pump to do the initial priming and wire it so I can switch it off before trying to start the engine. Trouble is my car (S2) is positive earth and many of the pumps, e.g. facet, available state negative earth only. Nevertheless I've bought a real cheapo one, under ?10, that doesn't specify + or - earth, I figured out I could get round this if it wasn't solid state. Here's what I've bought.
I'm happy just to try it out by reversing the red/black wires, but before I do I thought I'd ask on here for opinions before I wreck the pump. After all a tenner is a tenner what do y'all think?
I'm happy just to try it out by reversing the red/black wires, but before I do I thought I'd ask on here for opinions before I wreck the pump. After all a tenner is a tenner what do y'all think?
1965 Elan S2 (26/4726)
2002 Elise S2 (now sold )
1970 Scimitar GTE
"The older I get the better I was !"
2002 Elise S2 (now sold )
1970 Scimitar GTE
"The older I get the better I was !"
- Geoffers71
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Geoffers71 wrote:.... Trouble is my car (S2) is positive earth and many of the pumps, e.g. facet, available state negative earth only. Nevertheless I've bought a real cheapo one, under ?10, that doesn't specify + or - earth, I figured out I could get round this if it wasn't solid state. what do y'all think?
I've got a Facet in my positive earth S2 and it looks similar to your recent purchase. When they are plastic bodied they don't have a polarity, you just connect the Red (+ve) wire to ground and the Black (-ve) wire to your switch, as shown below.
Even if it was metal all you'd have to do is mount it on an insulator with nylon screws and make sure nothing touched it.
Meg
26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
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Quart Meg Miles - Coveted Fifth Gear
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I've done that on my TVR 3000S. Electric pump to fill carb then switch off. Turn Ignition key and Engine uses Mechanical Pump no problem. No noise from pump
Alan
Alan
Alan.b Brittany 1972 elan sprint fhc Lagoon Blue 0460E
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