NGK spark plugs

[gearheadbill]

Can anyone post the correct part number for NGK spark plugs...1940 stock 221in engine? Thank you

 

[Ball and Chain]

I have B5RES in my 41

 

[Talkwrench]

Not sure if the numbers are the same in the U.S. but in Australia its 6AB

 

[tubman]

I think you're right about Australia being different; here's the way they are numbered in the USA :

 

[Lawrie]

B6L for cast iron heads
Lawrie

 

[Lakewood]

The handbook says Champion H10 for cars H9 for trucks, this translates (for cars) to a NGK B6L, but can use a B4L for a hotter plug.
Essentially the main difference between a B6L and a B5RES is the thread reach, disregarding the resistor and the heat range.

 

[gearheadbill]

Thank you all. Really appreciate the help!

 

[42guy]

I have been using NGK 6bl in my 221cid 42 Ford for about 8 yrs. Really like them.

 

[gearheadbill]

got a set today 6BL...thanks again.

 

[philipswanson]

The handbook says Champion H10 for cars H9 for trucks, this translates (for cars) to a NGK B6L, but can use a B4L for a hotter plug.
Essentially the main difference between a B6L and a B5RES is the thread reach, disregarding the resistor and the heat range.

B6L or 6BL ???????????

 

[flatjack9]

B6l

 

[philipswanson]

I am running B4L plugs. Is that the wrong heat range or is it ok?

 

[Ronnieroadster]

I am running B4L plugs. Is that the wrong heat range or is it ok?

The B4L is a hotter plug than the B6L if your plugs porcelain looks white after running them then change to the colder plug B6L
Ronnieroadster

 

[philipswanson]

Of course it looks white. That's the color out of the box!

 

[34PKUP]

Of course it looks white. That's the color out of the box!

What part of "after running them" don't you get?

 

[Ronnieroadster]

Of course it looks white. That's the color out of the box!

Wow another expert! Were now saved

 

[philipswanson]

I am serious. If the plug is already white, how can you tell it is turning white??

Phil Swanson

 

[petehoovie]

I am serious. If the plug is already white, how can you tell it is turning white??

Phil Swanson

I think he's referring to the porcelain tip on the electrode end where the spark occurs....

 

[51 MERC-CT]

I am serious. If the plug is already white, how can you tell it is turning white??

Phil Swanson

If after running for a period of time the porcelain STAYS white it is too hot.
They should have a brown/tan tint.