Proper 420A Spark Plug Gap

[2GEEZEY]

Im going to be doing a minor tune up and will be getting new plugs and wires.

What plugs should i get? and what gapping should i get?

thanks guys

 

[adamzty]

NGK BRK6E or NGK BRK5E gapped to .050 for NA.

 

[2GEEZEY]

thanks a lot

 

[my4ATEurV8]

i have had great luck gapping my 420a to .044

 

[davidaham]

try plulstar plugs thay work great i love mine and the gap is pre set check there site The world's most powerful spark plug from Enerpulse

 

[urmomsaniceguy]

i agree with my4ATE. i gapped mine at .044.

 

[glowryder]

i roll NGK with ~ .45 NA ..

 

[bullettdsm]

BKR6e's in the daily stocker .045
BKR7e's in the NA (12.5 comp) .038
BKR7e's in the Turbo (10.5 comp BW366) .016

MB

 

[southrneclipser]

i first gapped mine at .44 then at .50 and didn't notice a difference

 

[hhuricane]

By the book it is .048-.053 in. (1.22-1.35 mm)

 

[dairyman69]

you can use regular copper core autolite spark plugs with .050 inch gap they have a colder heat range if you like driving at Wide Open Throttle most of the time

 

[Fotowntalon]

i suggest you stay away from autolite, go ngk all the way

 

[pgarland]

I went with NGK G Power plugs gapped at .045, they are relatively inexpensive plugs.

 

[Locke]

you can use regular copper core autolite spark plugs with .050 inch gap they have a colder heat range if you like driving at Wide Open Throttle most of the time

Autolite's can be purchased in various heat ranges, just like NGK, Champion, &c...

I've used NGK copper in the past, and recommend them as everyone else will. I am currently using some Autolite plug with no problems. I've been setting gap around 0.046", as this is about as large as I can get them without misfires lately.

 

[NeMiZiS]

I all ways have used the NGK's

 

[Fotowntalon]

Autolite's can be purchased in various heat ranges, just like NGK, Champion, &c...

I've used NGK copper in the past, and recommend them as everyone else will. I am currently using some Autolite plug with no problems. I've been setting gap around 0.046", as this is about as large as I can get them without misfires lately.

I worked at autolite, well Honeywell (who makes autolites) for over 2 years, i dont really trust there quality at all, although when i was there the defects per million was only at like 5ish, HOWEVER those numbers where taken when we made it up here in the states, now only the insultors are made in the states, and then shipped down to Mexico for assembly, so i am sure that number has rose quite a bit... sooo ngk all the way

 

[Locke]

Awe man, Honeywell owns Autolite now, too? They're buying all sorts of companies and moving production to... less than desirable locations.

 

[Fotowntalon]

yeah they've owned them for a good... 5ish years i think. I stopped buying fram to because they are now poorly made same deal i think.

 

[sk8rdude]

i suggest you stay away from autolite, go ngk all the way

i agree. i sell autolite plugs daily. they are junk. ive done more returns on them plugs than any other plugs. breaking inside the head, fouling out, not sparking, the excuses are endless.... just like everyone have said stay away from autolite. ngk for the win

 

[cyexmaster]

Always have used NGK's and never had a problem

I used bkr7e's on a stock 9.6:1 comp @ 12 with a 0.028 Gap

I tried a lot of different gaps and that one was the sweet spot....

 

[901-Memphis]

I prefer to set the gap on the small side of the allowable gap because its only going to get bigger if it wears out so start with the .048 gap if you can

If you change your spark plugs often you won't see the wear issue. NGK > Autolite

 

[cyexmaster]

I prefer to set the gap on the small side of the allowable gap because its only going to get bigger if it wears out so start with the .048 gap if you can

0.048 is on the small side... WTF

 

[DaJackal]

I have NGK BKR6's with a standard gap. My trusted mechanic said it's not worth it to adjust the gap these days - the standard (1mm or even less? can't remember now) is usually fine, you can make more damage to the plug if you try to regap.

I know this is just his opinion and more experienced mechanics will probably disagree, but think about it... As long as the gap isn't too long, how much can it hurt? If the gap is small enough there will be a spark.

 

[cyexmaster]

The problem with this is that a gap is effective(if all else constant except compression) depending on the compression on the engine. The more you increase the comp. ( by shaving head, dome pistons or boost) the smaller the gap has to be so you don't "blow out" the spark.

A wide gap is ok on a stock block NA and should not matter if they are not exactly what they should be, but with boost or high comp then you need to set the gap to compensate the change in pressure and not have spark blow out.

Or you could get a more powerful ignition and keep the gap wide.

 

[Mr Ortiz]

NGK BRK6E or NGK BRK5E gapped to .050 for NA.

What should I gap my NGK V-Power spark plugs for my 420A 2.0 non turbo? They are resistor type plugs.