Author Topic: '79 403 Spark Plug Choice  (Read 1075 times)

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Offline Maxthe222

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'79 403 Spark Plug Choice
« on: November 23, 2017, 03:19:34 AM »
Hey guys,

Looking to get some new plugs for my Y84, what kind of plugs should I get? I'm considering NGK V-Power Model XR45 Plugs.

Are those ok, or do you guys have any better suggestions? I'm more for reliability over power.


Thanks folks!

Offline winks79

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Re: '79 403 Spark Plug Choice
« Reply #1 on: November 23, 2017, 06:45:22 AM »
I'd stick with the AC Delco's that it came with. Never had any issues with them over the years.

Offline Aus78Formula

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Re: '79 403 Spark Plug Choice
« Reply #2 on: November 23, 2017, 07:04:49 AM »
Is she still stock,  Max?

Offline Maxthe222

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Re: '79 403 Spark Plug Choice
« Reply #3 on: January 25, 2018, 10:53:23 PM »
wow really late reply from me but yeah, 100% stock 403, I'll modify my Macho T/A engine, but the Y84 stays as original possible

Offline Aus78Formula

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Re: '79 403 Spark Plug Choice
« Reply #4 on: January 31, 2018, 03:50:11 AM »
Stick to stock plugs, can't go wrong with Delco, or equivalents. Regap to about .040" since don't need smog rubbish and reset timing until it's happier, 18-22 ish. R46SZ is original, or R46S where you set your own gaps. Make sure it's the correct type, nearly every Olds heads or engine I've pulled down has had some variation of Chev or Holden plugs in them, simply because the thread matches, but wide variety of electrode positions.

Offline Burd Turd

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Re: '79 403 Spark Plug Choice
« Reply #5 on: February 01, 2018, 05:05:14 PM »
The GM perf plugs are awesom, I run them in my 400.  They make like 1,2,3,and 4's. 
Born and Raised in South Detroit Bitches

Offline Aus78Formula

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Re: '79 403 Spark Plug Choice
« Reply #6 on: February 02, 2018, 01:36:36 AM »
Well, he'll need all 8 plugs...jk..what's 1,2,3,and 4?