Fuel supply

		Fuel supply

05/11/08

This turned out to be one of the more difficult parts of the change over as I had to rewire most of the fuse box and the wiring to the rear of the car. Not for the megasquirt but because either the prevoius owner or someone in the deep past thought they could wire the car to avoid the safety cutouts by wiring everything directly through the relays. IT WASN'T APPARENT UNTIL I ACTUALLY TOOK OUT THE FUSE AND RELAY PANEL TO CHECK THE WIRING! buyer beware

My original plan was to convert the CIS car back to running of a djet pump but after I burned that out I had to move back to using the CIS pump. I actually use a CIS pump on my Djet car so I dont know what I was thinking but you know how it goes!

I removed the existing system and (after much trial and error rebuilt it as follows)

I removed the CIS accumulator (too much pressure on the regulator) then inserted a small pressure regulator at the rear set to 50psi in case the regulator in the engine bay failed (the CIS pump can push out 110psi and the injectors will run at 25 - 40psi)

remember that as the pump can put out 110psi use the expensive 180psi piping don't use the 50psi piping. you can use that in the engine bay but anywhere before the regulator use the expensive stuff incase the regulator fails. nothing like an engine fire to keep you on your toes.

I then plumbed the engine bay to the injectors, I put the pressure regulator at the fron of the rail and then the damper at the rear on top of the old air housing where the fuel distributor sat.

it works just fine there and I can still fit the original air filter. As you can see at this point I have removed the restrictor plate from the original assembly so there is no problem using the original air filter and the megasquirt controls the fuel pump directly so I don't need the safety cut out switch on the restrictor.

This site was last updated 05/11/08