Quote:
Originally Posted by mfirth
What about NGK B6HS-7534 plugs? 1/2" reach compared to say an Autolite 216 with 7/16" reach, which Offy recomends.
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Just to keep the numbers straight here, we stock the 216 Autolite's, the thread length isn't .437", it actually measures .406" w/o the supplied washer and .343" with the washer in place! Obviously not counting the "tip" here.
Because of this spark plug issue with the Offy heads we try to avoid building with them when possible, but when we do we have the ability to make the necessary modification to make them work. many of our builds get new spark plug "repair-inserts" from the get-go. We know when they will be required.
Thanks, Gary in N.Y.
P.S. Anthony, the copper washers (.060") run about a 1.00/ea. With the heads in my photo we would need 16 pieces to make it happen. Before we do that when we need these heads on a build I would set them up for no washers. Not a big deal over here.