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Re: EFI in tank pump question
[Re: jbc426]
#1533590
11/16/13 03:20 PM
11/16/13 03:20 PM
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Joined: Dec 2003
Posts: 22,794
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,794
Bitopia
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So how is this surge tank vented, and the return lines plumbed to the surge tank, top or bottom draw? Is LP pump always oversized in capacity relative to HP pump so air/vacum is never introduced into surge tank?
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: EFI in tank pump question
[Re: jcc]
#1533592
11/16/13 10:10 PM
11/16/13 10:10 PM
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Joined: Mar 2007
Posts: 3,291
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,291
West Coast, USA
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Quote:
So how is this surge tank vented, and the return lines plumbed to the surge tank, top or bottom draw? Is LP pump always oversized in capacity relative to HP pump so air/vacum is never introduced into surge tank?
All the feeds and returns go to the top of the surge tank, however the high pressure electric pump does draw fuel from the bottom of the surge tank and feeds it out the top.
Any air that does get introduced into the surge tank when the low pressure pump's pick-up is uncovered momentarily by high G-forces and/or low fuel levels is quickly purged out the top of the surge tank and sent back to the main fuel tank.
This design feature is what almost invariably leaves the high pressure pump submerged in fuel, while the pick-up in the main tank is momentarily uncovered and allowing it to suck air on occasion without affecting the pure fuel flow to the high pressure side.
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Re: EFI in tank pump question
[Re: Stanton]
#1533594
11/17/13 05:36 AM
11/17/13 05:36 AM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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I am not impressed with some of the designs in drag cars not having the pickup in the back of the tank. When the fuel surges back, the pickup needs to be there. On roundy round cars, the pickup is on the outside edge of the tank. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: EFI in tank pump question
[Re: Stanton]
#1533595
11/17/13 01:27 PM
11/17/13 01:27 PM
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Joined: Mar 2007
Posts: 3,291
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,291
West Coast, USA
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Quote:
And for what it is you could buy a pump from "Tanks" and build your own surge canister to put it in and be a couple hundred bucks ahead
Yes, Stanton, there are a lot of interesting possibilities including what you're suggesting. There are a lot of talented fabricators out there who can build their own systems and lots of salvage and surplus yards that are full of cool fuel pumps, canisters and fittings that could be adapted for use in surge tanks systems.
I bought my own Duestchwerks pump on-line and decided to go with the convenience of Radium Engineering's high-quality surge tank.
When considering building my own tank, ( I have no experience welding aluminum) I found one of the more difficult parts to source when looking at building your own tank, is the electrical connector for the fuel pump. There is also the issue of creating a fuel proof seal to allow access inside the canister for installing and removing the pump. The rest is easy, especially if you can tig aluminum and precision machine things well.
One aspect of the Radium designs I don't like, is the lack of room to install a particle screen on the end of the high pressure pump once it's installed in their tank. This requires the installer to ensure that nothing but highly filtered fuel reaches the surge tank.
I am running 2 of those water separator/ fuel filters in my system, one between the main tank and low pressure pump, and another one just before the surge tank. They only flow enough fuel to feed 450 hp, but filter down to 2 or so microns. When I upgrade my engine and eventually supercharge it, I will have to either add additional filters plumbed in parallel or change to another style of filter with more flow. There are not a lot of high-flow filters out there that both filter particles that small and trap water.
Last edited by jbc426; 11/17/13 01:38 PM.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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