| [ Total Views: 885 | Total Replies: 8 | Thread Id: 32832 ] |
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 68notch
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| posted on December 11th, 2004 at 07:35 PM |
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using electric fuel pump in place of mechanical pump
Hi guys,
I have a suspect stock fuel pump in my Notchback that I want to replace with an electric one.
On the shelf I have a mazda electric fuel pump that I know works. Can I just wire it up and connect it in place of the stock mechanical pump or do I
need to resort to extreme measures to use it?
I am running twin solexes and I have a blockoff plate already to plug the hole in the case so just wondering does this pump require a return line
and/or regulator? Will the needle and seat in the carbs regulate fuel pressure and flow?
I have no idea so help is greatly appreciated regarding making the switch!
Regards,
JT
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
Beetle Restorer - Experience over 138% - YIKES --
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| posted on December 11th, 2004 at 09:45 PM |
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Hi JT....
The best place to put the electric fuel pump is under the fuel tank... and just wire it to the ignition circuit... if You add a switch somewhere.. it
doubles as an anti-steal switch....
The pressure from electric pumps into the carburetors can be too high for the needle & seat.... so You will probably need a fuel pressure
regulator....
I did with Mine.... the engine flooded, so I switched the pump off for a few seconds and the engine came good..... I have now fitted a Holley
adjustable fuel pressure regulator... in the engine compartment before the fuel goes to the carby..
See how You go...
Just take everything out of the old fuel pump hole....
and block it off with a plate + gasket or silastic....
My Son runs an electric pump in the engine bay in His Baja....
and a holley fuel pressure adjuster with Holley Bugspray carby.... Your Mazda pump may be regulated already??
Lee
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Oasis
Custom Title Time!
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| posted on December 12th, 2004 at 01:40 AM |
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Only use a Malpassy fuel pressure regulator. Different carbies like different amounts of pressure. Read http://www.lowbugget.com for Kadrons. Only what I've read and been told...
"Tell him 'We've already got one'"
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BiX
Veteran Volks Folk
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| posted on December 14th, 2004 at 08:22 AM |
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is the mazda pump a from a fuel injected engine or a carby engine?
I have no sympathy for my car, only the wallet that pays for it!
Go hard or go home!!!!
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68notch
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| posted on December 14th, 2004 at 02:36 PM |
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Thanks for all your help guys.
The mazda pump is from a 929 carby model. Unfortunately it had seized after sitting for a couple of years and no amount of dismantling and cleaning
out the crud could make it operate reliably so I'm back to square one. :jesus
After reading another post by dannyboy67 it looks like he's got it sorted so at least now I know what I'm up for and pretty much how and where to
fit one.
I'll post in the tech talk section a question regarding the problem that lead me to wanting to go electric in the first place.
Thanks again!
JT
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68notch
Casual Dubber
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| posted on December 15th, 2004 at 06:04 PM |
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Hey 68Auto, how did you regulate the fuel pressure?
I mean did you have to use a pressure gauge (like a T connection one) and just dial up the correct pressure on the regulator?
Also, what did you pay for your Holley one? I'm just after an idea of what the expense will be if you don't mind mentioning it 
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Craig Paton
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| posted on December 15th, 2004 at 08:08 PM |
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I have a Jaguar 6 cyl fuel pump that is self regulating and is quiet! I think it is a S.U. pump!
I believe these are sold from a business in Syd. Probably could contact some Pommy car clubs to find out more.
Cheers |
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68AutoBug
A.k.a.: Lee Noonan
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| posted on December 19th, 2004 at 11:34 PM |
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Yes the Holley regulator I bought off ebay cost $70 and is adjusted with a screw driver...
It came with no details of how to adjust...
ie,, which way to turn the adjusting screw....
My Son bought a holley adjuster with a large metal knob on the top... looks better and is easy to adjust...
It is just in the fuel line before the carburetor...
Mine is mounted on the fan housing...
cost about the same I think... two years ago..
Lee
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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matara
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| posted on December 20th, 2004 at 08:42 AM |
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What are the benefits of an electric pump over a stock pump in an otherwise stock motor?
Thanks
Steve
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