BBC spark plug help

slick5861 · 04-29-2017, 08:11 PM

We have a mid 70`s 454,290 casting heads,.600 lift solid cam,850 Holley HP, victor jr intake, 10-1 comp, bracket motor. Looking for some spark plug recommendations. Also has a crank trigger with a 7 al ignition. 7000 rpm limit with leaded race gas. Thanks for any input.

Lenny5160 · 05-01-2017, 11:12 AM

When I ran iron heads, I always used NGK R5673. The -8 heat range is a good place to start.

slick5861 · 05-01-2017, 05:29 PM

Thanks for the help. We will start there.

quickford1 · 05-01-2017, 06:18 PM

Autolite AR-133 or AR-134 the higher the number the hotter the plug.
Rich

04-29-2017, 08:11 PM	#1
slick5861 Junior Member Join Date: Sep 2008 Location: East St Paul,Manitoba Canada Posts: 23 Likes: 14 Liked 2 Times in 2 Posts	BBC spark plug help We have a mid 70`s 454,290 casting heads,.600 lift solid cam,850 Holley HP, victor jr intake, 10-1 comp, bracket motor. Looking for some spark plug recommendations. Also has a crank trigger with a 7 al ignition. 7000 rpm limit with leaded race gas. Thanks for any input.

05-01-2017, 11:12 AM	#2
Lenny5160 Senior Member Join Date: Nov 2015 Location: Inver Grove Heights, MN Posts: 898 Likes: 604 Liked 431 Times in 224 Posts	Re: BBC spark plug help When I ran iron heads, I always used NGK R5673. The -8 heat range is a good place to start. __________________ S/ST 51 S/C 53

05-01-2017, 05:29 PM	#3
slick5861 Junior Member Join Date: Sep 2008 Location: East St Paul,Manitoba Canada Posts: 23 Likes: 14 Liked 2 Times in 2 Posts	Re: BBC spark plug help Thanks for the help. We will start there.

05-01-2017, 06:18 PM	#4
quickford1 Member Join Date: Aug 2008 Location: Davidson, NC Posts: 269 Likes: 524 Liked 20 Times in 12 Posts	Re: BBC spark plug help Autolite AR-133 or AR-134 the higher the number the hotter the plug. Rich