Quote Originally Posted by Jim Standley
This is a question of ignorance and or lack knowing spark plugs heat ranges.
I have a sbc 350, 10 over with a crane cam #100172 218 int 218 exh at 50. I'm not good at Cam talk so if the 218 at 50 is confusing I gave the cam part # for reference.
The intake is a Edelbrock Performer RPM, with a 650 edelbrock carb, MSD ready to run dist 64 cc heads with 202/160 valves and headers.
The plugs that i'm using now are Bosch R3 Platinum 2. My question is? Is this the correct plug to be using and if not what would be recommended ?
Another thing to think about is the Platinium is a much harder and denser metal which make it harder for the current to go through them.
We run NGK plugs in about all the race engines dirt mod.,drag,street etc.
The cheap ones that sell for about $2.50 each.
I also have had good luck running the extended tip AC plugs with flat-top pistons.
I would call Edelbrock and see what they say.