http://66.17.171.114/PhotoAlbum/Cars/Pics/CTD_95.jpg
http://66.17.171.114/PhotoAlbum/Cars/Pics/CTD_96.jpg

This is the near completion of a idea for a fuel system upgrade I've been cooking up for awhile now. Here's a link to the pic where I drew it out a couple weeks ago in case you missed that post. Should answer most questions:

http://66.17.171.114/PhotoAlbum/Cars/Pics/fuelsys.jpg

The clear combo filter/check valve is the only part not shown in the drawing. I decided to add that at the last minute for no particular reason. Maybe it will show me when it starts sucking air some day. This is just a way to get more fuel delivery without using a high pressure pump and regulator. You should be able to get plenty of flow this way if your lines are big (3/8" or greater) and fuel filter not clogged. The pump is an Edelbrock 1792 rated for 160GPH at 12 psi. It is basically just running in parallel to the piston pump to either provide additional flow or redundancy in case the mechanical pump ever decides to crap out far away from home. Along with the aux tank, the entire fuel supply part of the picture is almost completely redundant now. I haven't installed the GDP big line between the filter and VE yet because I just don't need it right now. Maybe later this summer if and when I decide to blow a bundle on a real turbo and some EDMs. It'll be interesting to see if this fuel system would feed that well enough. I believe it probably will.

 

Sure made it more complex than I woulda done it . But nice work!

 

^ what he said. A bit over complicated isn't it? But to each his own.

Man-a-live what was the cost? I mean 160GPH @ 12PSI, a VE can't use
less than 10% of that flow.

OK, what public office do you hold or getting ready to run for??


59

 

Looks like that took a lot of time but great Job Notice any differences?

 

I think it looks more complicated than it really is. Apart form the extra tank, really the only additional parts are a pump a tee a couple check valves and some hose. Oh, and I did have to weld in a nipple for a tee in the hard line post pump. Is that complicated?

We won't know if does what I expect until there are much thirstier injectors flowing fuel. Convention wisdom (Wanna) suggests that even the piston pump is insuffcient for fuel delivery at some power level around 400hp. This is just an automotive example of putting in a good foundation before building the house.

 

Great pix Ace, ....almost like you had it "frame off". How did you get the camera there?

 

How's the fuel pressure under load?

 

The lowest I've seen it pull down to on the aux tank is 12 psi. It pulls down to 7 psi when running through the 5/16" lines off the stock tank. That's not even running the electric pump. I should do a run up my test hill with the electric pump running off the stock tank to see. I don't think it will make any difference. You can't put 10lbs. of stuff in a 5lb. bag, unless you stretch the bag (with higher pressures).

 

Where did you get the pretty red fuel line and is it okay for vegetable-oil/bio-diesel??

Do you have the fuel nozzle plumbed in yet??

Also, do you intend to replace the hard-line between pump and filter??

I think a rubber-line, between pump and filter, would make pump work a lot easier.

Thanks.

 

It's just general purpose 300psi hydraulic hose I get from a hydraulic supply shop near here. I think it's nitrile-core, don't if that's bio-compatible.

I'm not sure what fuel nozzle you're talking about, Bearkiller. No, the hard line to the filter is 3/8" and has my new pump's line already plumbed into it, if that's what you mean, just can't see it in the pic. It goes in up near where you trim the inulation to make room for the piston pump line. Welding in a nipple there was kinda PITA, but seemed like the best way to do it.

I like hard lines where possible or practical. I have 3/8 stainless hard line all the way from the selector valve back to the aux tank now. No worries.

 

In your diagram, you show what I thought looked like an auxilliary fuel-filling nozzle to possibly pump fuel into another vehicle or piece of equipment; then again, I may be seeing things with an overzealous imagination.

 

No, you got it. I use that 50 gal tank to haul kerosene for some oil burners we have for supplemental heat in the winter. There is another (3rd) pump mounted on the side of the toolbox for that. Total of seven pumps on the CTD if you count water, vacuum, power steering and the VE!

 

With piston pump and stock fuel lines, I made 443hp but could suck the fuel pressure down to zero. I'm sure if I used all that power alot, my injection pump wouldn't have lived long. With some bigger injectors, it would be interesting to see if pressure and volume could be maintained at the injection pump with use of 3/8" or 1/2" fuel hose between tank and lift pump. If I get crazy with my 91.5 in the way of HP, I'll plumb 1/2" hose between the tank and the piston LP.

 

Did Wanna ever plumb that new 2nd line he installed straight to the piston pump, just to see how it worked that way? I'm almost convinced the pumps are fine the way they are, just need bigger lines to flow the fuel is all.

 

Haven't got to it yet, waiting on warmer weather. That and I'd like to put a Davco 382 in place of the suction strainer. Then I can use a straight filter on the stock filter mount instead of the filter/separator. It's coming. I also want to get the pressure spring out of a 2nd gen pump and see how the piston pump works with a bypass.