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laza Offline
#1 Posted : Friday, 12 July 2013 10:23:57 PM(UTC)
laza

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Ok im putting a 5l efi into a hk holden ute and from what I can work out I have to put in a surge tank and a couple of pumps because im keeping to original tank and not sure if I can put a fuel pump in the tank itself (im not up to this part yet just want to get it straight b4 I do)
Been doing some reading and it looks like a carter or holley blue/black is the go for the lift pump and the bosh 044 (or equivalent) for the injector side
As for the setup from tank to filter to lift pump to surge tank out of surge tank to efi pump to pressure reg to fuel rail with return back to surge tank with over flow (on urge tank) to fuel tank
Does this sound about right or am I right of the mark? Have I missed anything? Is there any need to put a second filter in the high pressure side? Any suggestion on pumps or filter sizes etc would be more than welcome thanx
The only good thing to come in 2l is milk
HK1837 Offline
#2 Posted : Friday, 12 July 2013 10:43:52 PM(UTC)
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American Autos sell a little alloy surge tange quite cheaply. You just need a little Facet low pressure pump to get thee fuel from the tank to the surge tank, i'd use an LP filter between the fuel tank and the pump. Standard EFI high pressure fuel pump gets fuel from the surge tank to the fuel rail, also use an EFI filter here. Return line from the pressure regulator at the end of the fuel rail returns fuel to the surge tank. When we did this in my mate's WB I think he may have run an overflow from the surge tank too back to the fuel tank but I don't believe it is totally necessary.

This sort of thing for the low pressure pump:
http://www.ebay.com.au/i...ries&hash=item43bd5c38e9

American autos part number is 28-221 and you can see it on their site, but there are also ones on Ebay like this:
http://www.ebay.com.au/i...ries&hash=item257be680b6
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Utility8 Offline
#3 Posted : Friday, 12 July 2013 11:19:56 PM(UTC)
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I was faced with a similiar issue, but decided to travel the path of an 'in tank' fuel pump. I tackled it this way to achieve a tidier more servicable system. If I have a pump failure, it is simply find the correct Commodore pump replacement at any parts joint & I'm right to go, all standard. It's been running for approx 3 years with no issues. Fuel gauge is sorted out by a replacement sender unit card on the new pump that an instrument company modified for me.
This set up feeds a VK injection system on a 202 but my plans are to upgrade to an injected 304. Fuel system will be right to go.
Although this set up is in an EH, it would be no different in your application.



Weld in flange for pump.



New Commodore fuel pump with modified gauge sender card fitted.

Edited by user Friday, 12 July 2013 11:37:00 PM(UTC)  | Reason: Not specified

utility8
Dr Terry Offline
#4 Posted : Saturday, 13 July 2013 12:12:12 AM(UTC)
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Yes, that's the best way to go.

I've carried out many EFI conversions & the in-tank pump is the simplest, cheapest & most importantly the quietest solution.

Why use 2 pumps & a surge tank when one pump will do.

Dr Terry
If at first you don't succeed, just call it Version 1.0
laza Offline
#5 Posted : Saturday, 13 July 2013 8:23:58 PM(UTC)
laza

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thanx for all the replies guys as always you have been an asset top site
The only good thing to come in 2l is milk
edelbrock1 Offline
#6 Posted : Saturday, 13 July 2013 8:48:40 PM(UTC)
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I did the 2 pump and surge tank version because it was easier and cheaper for me. I was able to do it in a day myself. no messing with senders or guages.

Just used a facet pump to draw fuel through original system into surge tank, Then high pressure pump into original fuel line to the engine. Then installed another original fuel line on the other side of the car back to the surge tank. Overflow from the surge tank was plumbed into the fuel filler pipe and over flow fuel just ran back into the main tank.

Only time I ever heard it was when the main tank was getting low and the facet was sucking air it would thump a bit to remind me to get to a servo.

This way worked for me because I could do it all myself and I didnt have to take the tank out to get someone else to weld it or anything like that.
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