hot or cold plugs on 401 ,2-4's?

[cadipacer]

Just got a miss in the 401,, ,,, about time to change plugs,, I assume
fouled since running on 2bbls of each carb,, so any experience in this area that might improve the richer mix on idle?( low rise OFFY)

[Holeshot]

You didn't say what you have for ignition, so I will go ahead and tell you what is needed:

Electronic distributor - I use an MSD limited to 18 degrees of advance and 20 degrees initial (38 total) on 104 octane.

MSD 6AL (or equivilant) spark box.

I'm using Bosch Platinum fine-wire plugs.

My 2x4 engine is a +.030" 390 w/fully ported '70 heads, dynoed 518 to rear wheels when it still had a Torker & 850 Holley. Now using 2 660 "Center-Squirters" on an Edelbrock UR-18 Ultra-Ram. Way faster now but DON"T touch the gas pedal until it starts!!!

I've sold the car now but the 390 is getting retooled.

http://www.american-powersports.com/dave/image/amx/x_2x4.jpg

[cadipacer]

Hey thanks for the advise,,, your AMX looks great,,,
the ignition is Pertronix conversion,, and has 2 Carter 550's
I later found the plugs were fouled,, now I use AC rapid fire" plugs
work very good.. problem solved.