Author Topic: Spark plugs  (Read 1130 times)

csheff

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Spark plugs
« on: September 06, 2021, 06:03:46 PM »
What plugs are u using for a 428 CJ motor? Old style or modern ones?

Royce Peterson

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Re: Spark plugs
« Reply #1 on: September 07, 2021, 08:37:38 AM »
Original BRF32 Autolite plugs.


What plugs are u using for a 428 CJ motor? Old style or modern ones?
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

66S285

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Re: Spark plugs
« Reply #2 on: September 07, 2021, 08:54:23 AM »
New
66S285
68 KR #2375

gt350hr

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Re: Spark plugs
« Reply #3 on: September 07, 2021, 01:20:01 PM »
     BF32s . I still have a stockpile .
Celebrating 46 years of drag racing 6S477 and no end in sight.

Kent

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Re: Spark plugs
« Reply #4 on: September 08, 2021, 08:25:55 AM »
I use NGK and Iīm happy with them
SAAC Member from Germany and Owner of a unrestored 1967 Shelby GT500, 1968 1/2 Cobra Jetīs and some nice Mustang Fastbackīs 67/68

pbf777

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Re: Spark plugs
« Reply #5 on: September 08, 2021, 10:40:55 AM »
     NGK #WR5      ;)

     Scott.

shelbydoug

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Re: Spark plugs
« Reply #6 on: September 08, 2021, 11:47:32 AM »
I still "tune" with champions. They are cheap. I can go through them without too much worry and their heat ranges are accurate.

Once I settle on the range, I use a better plug. BF32's never were quite right but are what the original engineering specified often. The issue was probably never the plug but a weak ignition system?


If you look at the current application charts, those have been replaced by BF42's which are still available.

NGK's I find to be a very high quality plug. It's heat ranges seem to be very accurate.

In the case of my 67 GT500, I never expected the original plug to be a BF42. Huh?
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csheff

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Re: Spark plugs
« Reply #7 on: September 08, 2021, 01:39:59 PM »
Thanks guys

gt350hr

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Re: Spark plugs
« Reply #8 on: September 09, 2021, 11:26:44 AM »
    NGK WR5 is a good plug as well.
Celebrating 46 years of drag racing 6S477 and no end in sight.