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Best Spark plug

April 19 2017 at 8:16 PM
Marc K  (Login mdkallas)
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I'm running D2TEAA heads on a F250 with stock dist with MSD 6al box.
What is the best spark plug in your opinion?

 
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Cory
(Login 427Fastback)
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Re: Best Spark plug

April 19 2017, 9:14 PM 

In my opinion...If you can find some then use original Ford Motorcraft plugs...

 
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Brent Lykins
(Login blykins)
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I use a lot of Autolite 45's for factory head applications. n/m

April 20 2017, 2:58 AM 


 
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Bob
(Login machoneman)
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Say Brent, O/T but what plugs do you use in SBF's (peanut plugs)?

April 20 2017, 5:30 AM 

For aftermarket-headed W's or C's, Type and heat range? Thanks!


    
This message has been edited by machoneman on Apr 20, 2017 9:30 AM


 
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Brent Lykins
(Login blykins)
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Autolite....

April 20 2017, 5:44 AM 

For 9-11:1 engines, I'll use a 3924 or an AR3924 if it's a race engine. Racier deals with 12-14:1 will generally get an AR3910.

 
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Bob
(Login machoneman)
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Thanks Brent! Much appreciated. n/m

April 20 2017, 8:45 AM 

n/m

 
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doug smith
(Login cjshaker)
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Hard to beat the 45s for factory street stuff...

April 20 2017, 4:59 AM 

I had an MSD Blaster in my '68 F250 Highboy, 390 with C4 heads, and those plugs lasted 20 years without missing a beat and STILL looked great when I tore the engine down. I use them in the stock 390 in my '65 Galaxie and even my MR headed 427 in the Mach. Never any issues, although I do switch to the 124's in the Mach for racing. I've also used the NGK WR5, which is the equivalent to the Autolite 45.

 
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Rory McNeil
(Login RM428)
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How do they compare to old Autolite/Motorcraft?

April 20 2017, 10:43 AM 

Just curious how the Autolite 45 or NGK WR5 compare, heat range wise, to say an old Ford Autolite BF32. I just bought a set of NGK WR5s for the 428CJ I am putting together for my 59, and compared to some old BF 32s I have laying around, the NGKs do look like a hotter plug to me. I believe that Ford speced BF32s for the 428 CJs, and BF42s for regular 390s. Would my local Ford dealer still offer and direct replacement for BF32s, and if so, what is the part number? This 428 is esentially a stock std bore 428 Cobra Jet, with original "428 Super" cast pistons, stock CJ heads, the only modifacations are a mild solid flat tappet Oregon Cam, (similar to a Comp 270S),FPA headers, Performer RPM with a Holley 750 DP or 3310-1 780 vac, and a Canton deep sump pan. So I would think a stock range plug would be a good starting point. I do hAve a box with probably over 100 "lightly used" Autolite BF 22, 32 and 42 spark plugs, maybe I should just clean and reuse them!
428 powered Fairmont drag car, Best ET:9.97 @132.56MPH, best 60 ft: 1.29
59 Meteor 2 dr. sedan 332, Ford O Matic
74 F350 ramp truck 390 4speed
1985 Mustang 331 4 speed Best ET10.29at 128.7mph, 1.40 69 foot

 
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doug smith
(Login cjshaker)
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I can't say for sure...

April 21 2017, 5:33 AM 

I used to run the BF42s years ago but since they quit making them I've just used the 45s. They've seemed to last longer, but I'm sure that's just because I have more modern ignitions in everything I have. Although I used the points to trigger my Blaster ignition in my old Highboy, the Blaster made a big difference in starting and idle. I noticed slight evidence of pinging when racing my 427, so that's why I switched to the 124s on the track.

 
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TorinoBP88
(Login TorinoBP88)
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2x

April 20 2017, 10:24 PM 

N/m

 
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Jaysf250
(Login jaysf250)
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Autolite

April 20 2017, 1:25 PM 

I ran 32's for a few years in my iron heads but I mainly run 33's now. All iron except intake.

 
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John Beck
(Login jrb5862)
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Autolite

April 21 2017, 8:37 AM 

You still can get Motorcraft BSF 32 and BSF 42 plugs, just suppressor plugs. Been running them for years in both my FE cars, 390 and 352. Both engines converted to Duraspark Ign.

 
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Anthony
(Login abyars)
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Autolite 124

April 24 2017, 6:46 AM 

I've had the best luck with Autolite 124 on my low-compression stock, worn 390 with a Duraspark. This is in my F250 work truck driven daily. I know these plugs are FT spec but tried them on some other folks recommendation they last the longest and provide the best starting for my setup.
Anthony
1970 F250 2wd crew cab 390 C6
2004 Eddie Bauer Expedition
1955 Chevrolet 210 4 door Sedan

[linked image]

 
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