Author Topic: Spark plug advice  (Read 1338 times)

Trans Am Mike

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Spark plug advice
« on: June 25, 2016, 09:56:06 AM »
Assembling my stroked 455 today and im curious what spark plugs others are using and with what success?
455 block, Butler stroker assembly, 6X8 heads.
“You can all go to hell…I'm going to Texas”, Davy Crockett
1974 Trans Am 469/200-4R
1980 Turbo Trans Am Indy Pace Car

djustice

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Re: Spark plug advice
« Reply #1 on: July 02, 2016, 05:30:13 PM »
I have been using Champion RV17YC
Then i tried AC delco R46 TS
i am now using UR4 (NGK-6630)

i had good luck with all of them but i think i will use NGK¨s from now on.
1973 Firebird formula 400 W/YC code 455 (73 casting)
6x-8 heads, 140 lb spring preassure closed, scorpion 1.5 Roller rockers, holley 4160 750 cfm, edelbrock performer inntake, Headman 28150 headers 1 3/4" primary, Pypes SGF11R exhaust, cam unknown, alu radiator w/twin 12" fans. Yukon duragrip posi w/3.42 gears.

99tjadams

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Re: Spark plug advice
« Reply #2 on: July 07, 2016, 04:08:21 PM »
After reading a bunch of threads here the acdelco plugs seem really popular. That's what I went with R45TSX   but gapped at 0.045 as per Jim hands book.
76 trans am 455 4spd KRE heads

Re: Spark plug advice
« Reply #2 on: July 07, 2016, 04:08:21 PM »
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