Re: NGK Plugs
 

GB, B-4L is a hotter plug. Probably a number of reasons to use a hotter plug. I've used them in engines that used oil and they ran better and burned cleaner than with a colder plug. Otherwise, I use B6L.
Ken

Re: NGK Plugs
 

Best of all the choices for me.

Re: NGK Plugs
 

Which NGK would be best in a stock 59AB?

Re: NGK Plugs
 

I overhauled mine about 3000 miles ago , 120# compression, uses no oil I guess I'll buy the 6!

Re: NGK Plugs
 

Stock use the B6L

Re: NGK Plugs
 

Thanks to everyone for the glowing reviews of the NGK's, I originally got the recomend from someone local and was not sure.


Thanks again everyone

Re: NGK Plugs
 

Hello Anyone use an Autolite 386?
I am useing them on a stock 221 with dual exhaust and an old 30s Roof intake with no heat and two 81 carbs runs fine but last weekend we went on a Toy Run and lots of stop and go,started to run rough so I detoured on to the hyway for a couple of miles and it cleared right up? I might just try some B6L
Thanks

Re: NGK Plugs
 

B6L in mine

GB

Re: NGK Plugs
 

The B4Ls run a little cleaner with the cam and straight-linked triple 97s on the 286 in my roadster.

Re: NGK Plugs
 

What Gap is used on the B6L NGK plugs?
Do these plugs burn hotter that a 216 Autolight?

Re: NGK Plugs
 

The B6L is equivalent in heat range and operation wise to the 216 and the Champion H-10 The difference in the NGK is they will perform much better compared to the other two. At least thats what I experience when comparing the three in equal / identical applications. For gap .035
Ronnieroadster

Re: NGK Plugs
 

OK, I am always questioning. So for my stock, but 12v 221 I want to set my plug gaps to .035? Hoping to pick them up on Saturday if the smoke clears up enough to find the Napa store.

Re: NGK Plugs
 

Personally I wouldn't use a gap as big as .035. The HT side of the ignition can be a weak point and the spark will try and go anywhere except across that plug gap. It takes a lot more energy to jump a 35 thou gap than a 25 thou gap.

I have always used the autolite 216s. They work ok for me. I will probably try some NGKs next time, but I can't see how they will be better. As long as they work ok they will be as good as the 216s.

You need to have a plug type that is giving problems to then state that the replacements are an improvement.

NGK are a quality brand though and are an OEM supplier to the automotive industry.

Mart.

Re: NGK Plugs
 

I've been using the B4L also, helps with a little cam to keep them clean.

Re: NGK Plugs
 

Not 100% certain but I was always under assumption that plug gap for points is different from electronic ignition around .010” smaller? .030” points .040” electronic. Depending on the system? And magnetos even smaller? Say .025”? Just asking ��

Re: NGK Plugs
 

I switched to H10’s because I had three electrodes pull out of the 216’s. Never thought to use NGK, but I’ll give them a try next time I swap plugs....... Mark

Re: NGK Plugs
 

I stopped buying 216s many years ago because of poor quality with misplaced center and ground electrodes, made in China.

Re: NGK Plugs
 

Mart the plug gap at .035 if its a 6 volt system or 12 volt would only be the weak point of the HT side of the ignition circuit if the plug wires being used are junk. Since many of us have had problems with both the 216 and the H-10 stating the NGK replacements are an improvement is exactly what we are doing.
Ronnieroadster

Re: NGK Plugs
 

As for me it was the crappy plug wires. I learned a lesson about path of least resistance, and now I want the best HT side I can conjure up. Best plugs, best gap etc,.

Re: NGK Plugs
 

What gap should be used on B6L NGK plugs in a EAB stock Flathead