Looking for spark plug recomendation

[Tom Bellfoy]

i HAVE A 1937 v8 MOTOR IN MY MODEL a fORD, AND i NEED SOME NEW SPARK PLUGS. cAN ANYONE tell me what plugs I should be using.Thanks

[farmertom]

Originally Posted by Tom Bellfoy

i HAVE A 1937 v8 MOTOR IN MY MODEL a fORD, AND i NEED SOME NEW SPARK PLUGS. cAN ANYONE tell me what plugs I should be using.Thanks

I use Autolite 386 copper core 18mm plugs. ive had my '37 forder for 5 yrs now and have had 3 sets of them in mostly for test before and after new carb with probably 1k mi. in between each set. they have worked great. oreillys is where purchased.i get all my oil there too. 10w40 conv.their store brand.its only in there about 1k mi. there is no oil filter. i drive the'37 almost ever day. Tom.

[fredM]

I recently put in H10's. I did this because they are not resistor. I'm getting ready to replace the wires with low or no resistor too. Can't hurt.

[Tim Ayers]

Originally Posted by farmertom

I use Autolite 386 copper core 18mm plugs. ive had my '37 forder for 5 yrs now and have had 3 sets of them in mostly for test before and after new carb with probably 1k mi. in between each set. they have worked great. oreillys is where purchased.i get all my oil there too. 10w40 conv.their store brand.its only in there about 1k mi. there is no oil filter. i drive the'37 almost ever day. Tom.

Rock Auto has those Autolite 386's for $1.01 right now.

https://www.rockauto.com/en/moreinfo...choice=0-0-1-1

[farmertom]

Originally Posted by Tim Ayers

Rock Auto has those Autolite 386's for $1.01 right now.

https://www.rockauto.com/en/moreinfo...choice=0-0-1-1

if you have an oreillys near it might be close comparison price. don't know what rock auto shipping would be never ordered anything from them. Tom.

[Tim Ayers]

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Originally Posted by farmertom

if you have an oreillys near it might be close comparison price. don't know what rock auto shipping would be never ordered anything from them. Tom.

Good idea. Rock Auto usually gives you choices regarding shipping and never thought they gouge or overcharge.

[Bored&Stroked]

This is the spark plug I run in all flatheads where the heads require a 7/16 reach plug. I've found these B6L NGKs to be superior to the Champion H-10's of modern manufacturer.

https://www.oreillyauto.com/detail/c...plug/ngk1/3212

[petehoovie]

Originally Posted by Bored&Stroked

This is the spark plug I run in all flatheads where the heads require a 7/16 reach plug. I've found these B6L NGKs to be superior to the Champion H-10's of modern manufacturer.

https://www.oreillyauto.com/detail/c...plug/ngk1/3212

NGK Copper Core Plug Number B-6L Spark Plug - 3212

Part #3212
Line: NGK










$4.99 Each @ O'Reilly

[Tim Ayers]

Originally Posted by Bored&Stroked

This is the spark plug I run in all flatheads where the heads require a 7/16 reach plug. I've found these B6L NGKs to be superior to the Champion H-10's of modern manufacturer.

https://www.oreillyauto.com/detail/c...plug/ngk1/3212

For some reason, I thought he needed 18mm plugs. If not and they are 14mm, I agree 100% with the NGK's.

[farmertom]

Originally Posted by Tim Ayers

For some reason, I thought he needed 18mm plugs. If not and they are 14mm, I agree 100% with the NGK's.

agree ,Tim i thought the plugs he should be using are 18mm. as my m'37 orig eng. are. the ngk's that are mentions are 14mm. n Tom.

[34fordy]

[QUOTE=Bored&Stroked;2385815] I've found these B6L NGKs to be superior to the Champion H-10's of modern manufacturer.

Is there a difference in the quality of "modern manufacture" plugs to the H-10 plugs of yesteryear Dale?

[Drbrown]

I have a '47 but question could still be same. Its stock plug is/was Champion H-10. It came to me with Champion H-11's which are slightly "hotter" and might be used if one's engine is burning oil. Mine does not seen to. Regardless the H-11's burn well so I keep using them. There is an Autolite alternative but I did not find they are any advantage to me. I understand the Champion's are no longer made and hard to find but may rarely be found NOS on the internet. Some members here have other preferences which I have not tried. Regarding wiring, a previous owner converted my ignition from points to a Pantex electronic module and replaced the plug wires with silicon core wiring. I had much trouble with the very expensive electronic modules so I change back to stock ignition points.

[Bored&Stroked]

[QUOTE=34fordy;2385917]

Originally Posted by Bored&Stroked

I've found these B6L NGKs to be superior to the Champion H-10's of modern manufacturer.

Is there a difference in the quality of "modern manufacture" plugs to the H-10 plugs of yesteryear Dale?

I used to run Champion plugs in my flatheads (50 years ago) - and they seemed just fine. In modern times I've had issues with them fouling and then not seeming to work once they were fouled. This has been on multiple engines - flatheads and OHVs. I'd had experiences at the race track (El Mirage), where our crew (before I arrived) put in a set of Champion plugs into our blown Flathead Cadillac motor, probably pumped too much fuel into the engine . . . it attempted to fire and then they couldn't start it.

When I got to ElMo, everybody was hang-dog saying the magneto/ignition had failed, no spare . . . blah, blah, blah. I asked them what plugs they had put in the engine --> Champions. I asked if we had any NGKs in the trailer? They said "Yes" . . . and I relayed my issue with fouling and that I suspected this was the reason it wouldn't start. Everybody thought I was nuts . . . so, they kept sulking in their chairs.

I went into the trailer, gapped a set of NGKs and swapped them in and asked for help starting it (blown alcohol injected - takes two people) - it fired right up, and we were off and running. They couldn't believe it - but witnessed it with their own eyes. Since that time, we've never ran Champion plugs in the motor.

Now, that is just my own experience - maybe others have had better experiences, but I run with what has worked for me.

D