best spark plugs for efi?

[ponch0v]

whick brand spark plug is every one using for their efi conversion (302 block/heads)? what heat range? gap?

 

[Broncobowsher]

Go to the parts store and ask for spark plugs for whatever your donor car is. Don't tell them it's actually for a Bronco. They will often tell you what the gap should be for that application as well (Usually .045). Brand is up to you, I usually just grab Autolite or Motorcraft.

 

[mxpaz]

Mine are motocraft.

 

[ponch0v]

are the plugs the same size? i thought that after 76 (?) Ford went to the smaller plug.

NOPE, just looked it up...the 91 Mustang plug is a 14mm and the 71 Bronco plug is a 18mm. Just as I thought.


Any help on this?