Fitting an electric fuel pump

[john.p.clegg]

1) Saves the oil in your sump from being diluted with petrol when the seal goes...

2) Primes the carbs ready for first time starting...

John

[YellowS4DHC]

Does anybody know if there is a measurable hp benefit to fitting an electric pump and removing the mechanical one? I've always wondered about that. I expect it to be small, but small things can add up.

Rick


'72 Europa TC
'69 Elan S4 DHC
'67 S800 Coupe
'57 T1 Speedster

[alexblack13]

I have a mechanical fuel pump on both my Caterham Xflow and on my Elan. What is exactly the benefit of going electric? I don't get it?

1) ... Removal of oil leaking mech' unit.

2) ... Carb' priming after engine not started for a month or two. (Not a summer issue of course)..

That's all for me. Had I not had the oil leak I would not be changing the pump. + The electric unit is cheaper apparently. Even the service kits are expensive to buy original ones..

Happy days...

ab

[kstrutt11]

I even found in the summer it helps starting, the fuel in my carbs seems to evaporate off quite quickly. (dellortos).

[StressCraxx]

Does anybody know if there is a measurable hp benefit to fitting an electric pump and removing the mechanical one? I've always wondered about that. I expect it to be small, but small things can add up.

Rick

Some Formula Ford racers claim a slight (less than 1HP) gain. 1HP is the limit for dyno accuracy though.

[Lincoln62]

I bought this pump from a Weber specialist (in Melbourne) and it is very quiet. I tossed the original bracket and made my own so I could mount it in rubber.

Works fantastic.

Pete

[Bart_arc]

Does anybody know if there is a measurable hp benefit to fitting an electric pump and removing the mechanical one? I've always wondered about that. I expect it to be small, but small things can add up.

Rick


'72 Europa TC
'69 Elan S4 DHC
'67 S800 Coupe
'57 T1 Speedster

You get rid of the mechanical (friction) losses when you use an electric pump but that won't gain much hp,
more important when you have a high reving engine (7000+) with big carbs you'll need a higher fuel flow rate to prevent starvation in the carbs.

[Pistacchio sprint 72]

Thank you for the explanation.

[alexblack13]

I bought this pump from a Weber specialist (in Melbourne) and it is very quiet. I tossed the original bracket and made my own so I could mount it in rubber.

Works fantastic.

Pete

Very neat and tidy Pete. Good job! Thank you for the pics too..

AB

[alexblack13]

I have the new pump running now having finished the install today. I have to say it is indeed very quiet. Very difficult if not impossible to hear in drivers seat. Very subdued sort of low freq' Bbrrrrr type sound. I am impressed also with the flow at the carbs. Even with the st'd pump still fitted the flow looks excellent. I have the little regulator set to 2lb / sq". So far very good

I decided in the end to fit the ass'y to the front of the spare wheel well for ease of access as I like to store some bits n bobs in the wee Cubby hole to the right side of the tank. It's very handy. So not carrying a spare wheel I decided fit it where it's easy to reach and service when needed...

Question guys, ( Rohan?? ) .... Has anyone fitted a Crankcase vent / breather tube onto the blanking plate covering the hole where the mechie pump comes off? I was thinking of fitting a pipe from the plate up to the air box, possibly even 'T' ing into the existing breather pipe from head to air-box. Any thoughts? Good idea? Or don't do it! What do you think lads?


Santa Clause brought me one of those nice bore scopes with an 8mm dia camera on a 1200 mm long flex. Plugs into my laptop and produces amazing quality pictures / views .... Happy chappy..

Alex

[john.p.clegg]

Alex
Does it have a swivel head??

John

[alexblack13]

Had I bought it myself it would have had John. But beggars cant be choosers eh!

One can maniplate the image via the laptop though. I am very happy with it.

Al' ....

[Quart Meg Miles]

Question guys, ( Rohan?? ) .... Has anyone fitted a Crankcase vent / breather tube onto the blanking plate covering the hole where the mechie pump comes off? I was thinking of fitting a pipe from the plate up to the air box, possibly even 'T' ing into the existing breather pipe from head to air-box. Any thoughts? Good idea? Or don't do it! What do you think lads?

It's a bit of an active area around there, lots of oil flying about off the con rods so I wouldn't do it. The standard breather position is in a pretty quiet place, especially if you're going to feed it into the air box.

BTW, which pump did you actually use? Several people have loosely quoted the make, like Facet, but not the model.

[alexblack13]

It is the Facet POSI FLOW... I have some pic's up showing the ass'y of pump and the small reg that suits it perfectly. Check out page 2...

More or less what I thought regards the breather.. Thanks bud..

Alex...

[billwill]

Not quite what you were asking, but look at my experimental breather vent in the last message on thiis page:

elan-f14/getting-ogu-roadworthy-again-t26101-75.html