spark plug question

a383z28

a383z28

Forum Member
Just wondering what plugs to put in a 12:1 small block, just wondering what everyone else has....any help thanks.
 
You need to give more info......like what type of head you are using, tapered or gasketed seat plug type, street drag, circle track use, etc.
 
ok, I am running dart iron eagle 215's and I had 2.05 intake valves put in with the 1.625 exhaust valves. the plugs are tapered I have in there now (R44TS) I will mainly run it at the strip, on race gas. Ignition I am running a mallory micro processor with a MSD pro dist. I do not PLAN on putting any power adders on for now maybe down the road after I get the bugs worked out. Fuel system is covered with aeromotive system, I figured I would see if I am in the ball park with these plugs. I had this motor combo in my camaro and it ran real good but never made any hard runs with it mainly in and out of the shop.
 
NGK R5674-6 for a projected tip (usually makes more NA power IF you have enough clearance to run) or r5673-6 for a non-projected tip .035-.040 gap
 
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