BBC NGK plug heat range for alky terminator

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February 25, 2025, 02:57 PM

00 DEAD ON

BBC NGK plug heat range for alky terminator

What heat range are you running on alky? I have a 598 BBC with a terminator. I run extended tip NGK -9 plugs. Should I run a hotter plug and why
Thanks in advance

Brian Mollison
2013 American Dragster
2020 Sumerduck Dragway VA Top ET Champion
2017 Sumerduck Top ET & SSS Track Champion
2017 MAC Top ET Track Champion
2009 Sumerduck Dragway Va Top ET & IHRA SSS Track Champion
2008 IHRA Division 1 Top ET Bracket Final Runner-up
2007 Colonial Beach Dragway Top ET Track Champion

February 25, 2025, 03:01 PM

Lenny5160

I run -8. Don't have a reason other than it's what I've always run. Bought my Terminator system in 2004.

February 25, 2025, 04:46 PM

wideopen231

IMO 9's are about perfect plug with alky. Ran them with blowers , injection and hell even with 95% nitro, 8 little hotter and 10s lil colder plug and all 3 work I have always ran 9s and now having hard time finding some.

February 25, 2025, 04:59 PM

markemark

Have never run anything but -9 in MFI and now EFI methanol. My system likes/ runs 1100* egt at the 1/8 mile.

February 25, 2025, 05:46 PM

Big Steve

5238-9 here with 565 and Terminator. I gap at .024.

Ran -10 with the TD blower motor gapped at .016

February 26, 2025, 07:14 AM

BD104X

588" with a Terminator - I have been running the NGK-9 for about 20 years. I switched to the extended tip a few years ago and have been happy so far.

February 26, 2025, 09:52 AM

markemark

quote:
I run extended tip NGK -9 plugs.

What’s the model number on the -9 extended tip (NGK-xxxx)?

February 26, 2025, 12:12 PM

Jonesz

7405

February 26, 2025, 06:14 PM

00 DEAD ON

Thanks everyone I appreciate it. I’ll stick with my -9 plugs

March 02, 2025, 12:47 PM

Alaskaracer

I ran -9's on my 16.5:1 setup before, profiler 12* heads....10's seemed too cold. New stuff I'm at 17.72:1 and I'm running 10's. Could probably still run 9's and be ok.

Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com
"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer

March 03, 2025, 02:57 PM

inferno camaro

I still run 8's in mine. What's the advantage to running a cooler plug? I've had from 11's to 8's and honestly don't see a difference.
But also not sure what to look for I guess.

March 04, 2025, 09:43 AM

329L

quote:
Originally posted by inferno camaro:
I still run 8's in mine. What's the advantage to running a cooler plug? I've had from 11's to 8's and honestly don't see a difference.
But also not sure what to look for I guess.

^^^^SAME
I have conventional heads and i run -8s, both on motor and when i spray. My buddies that have 12 degree heads use an extended tip 9