Day 1...

Day 1...

Thursday, August 31, 2017

Carb Conversion Part I

Earlier this week I received my "turnkey" carburetor conversion kit from a designer/fabricator/DeLorean owner in North Carolina. The kit has essentially everything needed to convert from Bosch K-Jet CIS fuel injection over to carburation.

Sunday I started tearing down the K-Jet system and boxing up the parts.

 

I ended up with this...



Monday and Tuesday I started making preparations for the new intake and carb setup. I started by installing the mechanical fuel pump on the back of the passenger side cylinder head. Then I removed the high volume electric fuel pump in the tank and replaced it with the custom fabricated fuel pickup. For now, I plan on repurposing the old K-Jet return line (metal) to be the new low pressure supply line to the new fuel pump. 



You can see the fuel pump in the upper right corner of the picture above. I have not connected it to the carburetor yet. 

Wednesday I installed the intake and carburetor. I also installed the PCV valve and new vacuum hoses running between the air filter, oil filler cap, and intake vacuum.



I still have the following tasks to complete before I attempt to start the car with the new setup:

  • Shorten and connect the throttle and transmission cables to the carburetor
  • Install the metal fuel line between the pump and the carburetor
  • Purchase and install a new 3/8" ID vacuum line between the brake booster supply and intake (red disconnected hose in the previous pic)
  • Purchase and install a vacuum line adapter to go from 3/8" down to 3/16" male so I can connect to the 3/16" vacuum connection on the intake. This is a tapered vacuum line only used on cars with auto trans
  • Cleanup a few more small components left over from the K-Jet, lambda, and evap control systems (vacuum delay valve, vacuum solenoid, ECU, K-Jet supply fuel line from the top of the old fuel filter). 
  • Remove the old compression fitting on the repurposed metal fuel line I'm now using for fuel delivery from tank to engine bay. Ideally, I would like to put a barb or some type of safety measure on there before I clamp a low-pressure hose directly to it. The other end of the hose will go to the inlet on the mechanical fuel pump. 
Here is a picture of what it looks like at the moment.



I will likely be out of town this weekend so not sure how much progress will get made here over the next couple of days. Stay tuned...