Heads Twin Plug measures for machining...

[dan67]

Hallo!
I search fom maching my heads the measures/draw other materials.
thanks All
danilo
italy

[cameron.arnott]

Hi Dan

Are you asking about port sizing? What are your engine specifications?

Cheers, Cam

[dan67]

Hi Dan
Are you asking about port sizing? What are your engine specifications?

sorry! I spoke evil, my englais its very poor....I am speaking to 2° hole for spark plug (simmetrical to first i suppose..) I search tecnical data for maching this hole (measuremet...draw...)
ThANKS!

[cgarr]

We setup 24 and 12.5 degrees off the head face, as far as the hole placement that is setup with our jig. We use a 1" ball nose mill then face the plug seat with a 5/8 and thread them for 12mm spark plugs. This gives room for the head bolts without interference. Get a scrap head to practice on, then you can make a jig. You cannot setup off the original plug and flip the head for the new hole, you will hit the intake seat.