Indexing small block ford plugs?

Ed Wright · 07-16-2012, 01:41 PM

Plug indexing brings back memories of old straight plugs & huge domes that would knock them shut if you didn't.

Remember "fire slots"? LOL

Jim B · 07-16-2012, 02:47 PM

Quote:

Originally Posted by Ed Wright

Remember "fire slots"? LOL

Would I be out of line if I suggest you remember relieving a Ford block and using Johnson tappet wrenches? I'd go as far as to bet you're familiar with shortening the tops of the lifter bores for better access to the adjusting nuts......

Ed Wright · 07-16-2012, 03:01 PM

Yep, I raced a couple of flat heads too! LOL

FED 387 · 07-16-2012, 05:28 PM

more than likely the reason for indexing is to avoid contact between the ground wire and the piston thus closing the plug- on any engine--might be some HP value in doing that but probably insurance to avoid the contact----

07-16-2012, 01:41 PM	#1
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Indexing small block ford plugs? Plug indexing brings back memories of old straight plugs & huge domes that would knock them shut if you didn't. Remember "fire slots"? LOL __________________ Ed Wright 4156 SS/JA

07-16-2012, 03:01 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Indexing small block ford plugs? Yep, I raced a couple of flat heads too! LOL __________________ Ed Wright 4156 SS/JA

07-16-2012, 05:28 PM	#4
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 529 Liked 333 Times in 180 Posts	Re: Indexing small block ford plugs? more than likely the reason for indexing is to avoid contact between the ground wire and the piston thus closing the plug- on any engine--might be some HP value in doing that but probably insurance to avoid the contact----

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