what spark plug for vortec heads
#6
Le Mans Master
opel - here are some possible choices. Do your own research to
confirm suitability.
Physical dimensions: 14 mm thread, ¾-inch reach, 5/8" socket
tapered seat, projected nose
NGK - The larger the number. the colder the plug is
TR5 (Stock)
TR55 (Colder)
TR6 (Coldest)
AC/Delco - Indentification
R42LTS
R43LTS
R44LTS
ACCEL (.708" reach) 524 and 526 also available with short insulators
514 (Cold)
516
524 & 524S
526 & 526S (Hot) Stock equivalent for '96-98
Autolite - Tech Info
AR103 (Racing)
AR104 (Racing)
605, AP605 (Plat), APP605 (Double Plat), XP605 (Xtreme Perf)
Bosch (only 0.69" reach - 17.5mm)
HR9DC
HR8DPX
4305
4458
4205
.
confirm suitability.
Physical dimensions: 14 mm thread, ¾-inch reach, 5/8" socket
tapered seat, projected nose
NGK - The larger the number. the colder the plug is
TR5 (Stock)
TR55 (Colder)
TR6 (Coldest)
AC/Delco - Indentification
R42LTS
R43LTS
R44LTS
ACCEL (.708" reach) 524 and 526 also available with short insulators
514 (Cold)
516
524 & 524S
526 & 526S (Hot) Stock equivalent for '96-98
Autolite - Tech Info
AR103 (Racing)
AR104 (Racing)
605, AP605 (Plat), APP605 (Double Plat), XP605 (Xtreme Perf)
Bosch (only 0.69" reach - 17.5mm)
HR9DC
HR8DPX
4305
4458
4205
.
#7
Burning Brakes
Thread Starter
Thanks Slalom4me, good info this is a higher compression engine so I was thinking of the Delco R42LTS. I was running the R45LTS with the other vortec heads on a lower compression engine. I'm hoping to finnish it this week end.
Dave
Dave