[Jamieb]

I am in the final stages of building my Iron eagle based 427 sbc and I am looking for recommendations on spark plug #'s. It is a Street/Strip deal with 11-1 compression 672 lift roller cam, CNC'd old style Pro1 heads, t&d Shaft mount rockers, Eagle rotating assembly, CNC'd 2975 Victor Jr., HVH super sucker, Aed 850 Ho Carb. I have always been partial to NGK plugs, but any recommendations would be appreciated.

[blown71nova]

i think i would start with ngk 5671-7 or 5671-8 i think the #8 may be a little cool Bob

[lun40119]

I have got 7's in my junk at 11.3:1, on 93 octane and 38° timing.

[Jamieb]

What heads and CI are you running?

[lun40119]

400inch, with ported 215's. 2.08 Intake valve.

[Jamieb]

are they the platinum 215s or the older style and do you have any idea what they flow?

[lun40119]

platinums, and yes I know what they flow.

[want-a-be]

Originally Posted by lun40119

platinums, and yes I know what they flow.

But he is going to keep it a secret cause he goesn't want anyone else figure out his speed secrets...

Don

[lun40119]

They flow air and fuel.

[lun40119]

And sometimes bugs, and other crap, that gets sucked in

My junk will eat anything.