Which Spark Plug
#16
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Originally Posted by bigray
sorry still just a little confussed.with the head off.the gap should be facing the valves or the piston.. ops:
JMO
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#17
Senior Member
RACING JUNKIE
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,391
Bigray, I think it is facing the valve, but double check me on that... it has been awhile.
Am I the only person out there that has fouled Autolite, NGK, Champion, etc... THEN WENT to Bosch "Platnum" & never had a problem since??? When jetting or tuning a carb (such as new one) I will never run anything else... they simply don't foul. I had NGK, & crossed over the correct heat range for my BBC & never had a problem again... they cost more, but who cares. JMO
Am I the only person out there that has fouled Autolite, NGK, Champion, etc... THEN WENT to Bosch "Platnum" & never had a problem since??? When jetting or tuning a carb (such as new one) I will never run anything else... they simply don't foul. I had NGK, & crossed over the correct heat range for my BBC & never had a problem again... they cost more, but who cares. JMO
#18
I draw a black line (permanent marker) on the porcelin where the backstrap is on the plug so i can see where my mark is..i try to get the backstrap in the 12 o'clock position..but 10 and 2 will work...i index for clearance insurance only..keeping backstrap as far away from piston as possible.
Brian
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
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#20
Banned
APPRENTICE
Join Date: May 2021
Posts: 10
Hey guys, I am needing some advice on selecting a spark plug. I have a 421 SBC on alcohol. The compression is 14:1 I have a MSD 7AL-2 with a baster coil to provide the spark. Not too familiar with alcohol. What plugs would yall recommend. Any help or advice would be greatly appreciated.
Nox Vidmate VLC
Chris
Nox Vidmate VLC
Chris
Last edited by eerode; 06-04-2021 at 02:08 AM.