As previously stated, I really didn't want a carburettor perched on my 302 Ford engine as I didn't want the hassle of babysitting it. But I did want to retain the traditional look whilst taking advantage, and having the benefits, of a hi-tech engine management system. So with those criteria set-in-stone, I opted for the MSD Atomic EFI unit.
This is a square bore carb' lookalike unit which sits where the carb' should be, and it contains all the sensors and gubbins to provide electronic fuel management.
The package comes with everything you need: i.e. the main square-bore bolt-on EFI unit; fuel pump; fuel filters; high-pressure fuel pipe and all the fixings. It also has a very nice looking Power Controller unit "black box" (which is red) and a plug-in hand-held controller which allows you to alter and tweak things without a laptop. I also don't need to relay this as it's all taken care of internally.
I fitted the fuel pump and low-pressure filter just behind the differential. Removed the GD copper fuel pipe and run the MSD hi-pressure "soft" pipe down the ladder frame to the front of the car. It is not recommended to run the pump with a "hard" fuel pipe. Something to do with how it pulses to provide the unit with just what it needs. The high-pressure fuel filter is in the engine bay and of which I will be shielded with some kind of cover. Don't need fuel being sprayed around hot things in the case of a leak..!
Also, this type of fuel system is returnless. Am very pleased about that as the only fuel associated thing in the boot will be the tank and a single low-pressure feed to the external pump. Also, I didn't want to hide the Power Controller away anywhere as it looks good and beefy, so I put it on the firewall next to the fuse boxes.
Template and mount being bent to shape
Finished Mounting Plate
All painted up and ready for connecting up
(one live wire from the ECU and one to gnd)
Nice view of the Power Controller and MSD Air Cleaner.
The bunch of wires are the ECU wires that need to be managed properly
(Cable management job added to the list of things to do)
Positioning: Trial fitted the fuel tank in the boot, and I decided to reposition the two retaining straps to the outer edges to the raised centre part of the floor. A total move [inwards] of about 5 cm for each strap... When I measured up I had a concern with the positioning and proximity of the securing bolts as they would have been virtually touching the top of the silencers. There was ~0.5 cm clearance for the nyloc nut and load-spreading washer, which really wasn’t enough for my liking. Moreover, I was not happy with the nyloc being so close to the heat source.
Insulation: I used 25 mm x 10 mm foam strips for the bottom and 25 mm x 6 mm strips on the back of the tank. I also stuck some 2 mm rubber sheeting on the underside of the straps to insulate those from the tank too.
Fitting the Retaining Straps: Bending and fitting the steel retaining straps was interesting, and I became aware very quickly about “bend radius” and how the straps needed to follow the angles of the tank; in my humble opinion, the strap shape at the edges had to be a proper fit otherwise the majority of the holding force would have been on the single edge... Not good.
Made an aluminium template and marked up where the bends were to be (allowing for the radius,) then I bent the lower bend and got that to fit properly with some judicious use of a club hammer. Then I re-verified the upper bend location and bent and bashed for that.
Bending was achieved by clamping the steel strap in a homemade jig. Essentially the jig was a couple of pieces of angle iron with bolts at each end. Bend procedure was: heated up the area to be bent, then, by further clamping the piece between two additional metal plates to keep it as flat as possible [when bending,] made the bend. Then I finished off with the club hammer.
Not ready to fit for good yet, but when I do I will be using socket-head bolts and nylocs on the underside - not forgetting the large load-spreading washers, or maybe a plate (not sure yet, but I’ll probably make a plate.)
So, when fully installed, the tank will be insulated from any contact with metal or GRP and it will be firmly and snugly cushioned and positioned. And there will be nothing protruding into the boot area or in close proximity to the silencers... Will be happy with this.
Not fixed in yet. Still got the plumbing to do.