How to read spark plugs

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Frizzell Racing

Жыл бұрын

How to properly rear spark plug and myths
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Пікірлер: 37

@ShadowVonChadwick 8 ай бұрын

Great summary, that's how I have known to read a plug. Yes, the plug is the business end of a combustion chamber. Besides of a strip down, and then you still don't get instantaneous info for fine-tuning

@stevenmitchell5612 10 ай бұрын

%thanks. It’s nice of you to show these secrets. I appreciate it.

@Bige4u Жыл бұрын

Old school ways may not be dead... but it wouldnt hurt to suggest using a wideband 02 AFR gauge along with a vacuum guage, both are great carburetor tuning aids for the mostly street driven vehicles to help monitor what your engine wants instead of pulling the spark plugs, even though it should still be done from time to time for verification.

@frizzellracing Жыл бұрын

The Galaxie is nostalgia raced. No kind of sensors are allowed on it to be legal

@BookAutowerks 10 ай бұрын

Great video!

@frizzellracing 10 ай бұрын

Thanks!

@AtimatikArmy 2 ай бұрын

Will this apply to 20-strokes?

@tbl8560 Жыл бұрын

Interested to know how you identify the correct heat range plug. Knowing that heat range affects timing mark on the strap, it's confusing when many mention heat range and strap color like you would when identifying the timing mark.. I've understood that you need to look at heat in plug base and threads. Looking forward to your insight. BTW - use a 5/8 hole saw to cut the crimp off the plug base works great to remove the center section.

@frizzellracing Жыл бұрын

Good tip. I will try to do a more in-depth video on plugs soon. I kinda skimmed across the subject just because I wasn’t sure if anyone would actually find it interesting

@flappingflight8537 Жыл бұрын

Heat range is observed on the threads. If only first 2-3 treads are darker then the plug is in the proper heat range . Then you can use the ground strap mark for determining the proper timing . The exact timing is when the mark is exactly on the middle of the turn and if it is as close to the base of the strap as in the video this means that the timing advance angle is too much!

@stsword9706 4 ай бұрын

great infos. can i apply this method for testing the combustion in different carburetor throttle opening (not only at full throttle)?

@frizzellracing 4 ай бұрын

At idle a carburetor tends to run a hair rich, that’s so when your wide open it doesn’t run lean. So a plug that has a lot of idle time will read a little richer than its actually running

@skip741x3 Ай бұрын

Are you able to even see that fuel line showing on the porcelin when a plug is intact and not torn apart? I honestly never even noticed such a line before although in all fairness, I have always checked after driving around and not from a full throttle pull... also in regards to timing, if it is set dead on with a timing light , are you saying that should be Disregarded if the strap is showing a partial coloration and advanced further till its colored down the entire strap even if the timing light would show its too far advanced?

@frizzellracing Ай бұрын

Depends on the plug really some engines run a “big” plug like the FE does. You can see them pretty easy. Then like the Windsor it runs a smaller diameter plug and they are hard to see but a lot of modern cars run a smaller plug but they are really long. Those are almost impossible to see the fuel line on

@OwensArk-pq7mp 7 ай бұрын

Im running 2 heat ranges colder than stock plugs call for. Im reading my timing based off of that, will that be throwing off my reading? Or will the timing mark on the strap be the same no matter what heat range? thanks

@frizzellracing 7 ай бұрын

The timing mark will still be the same. Reading the heat range is different. Timing mark should still be in the same place

@OwensArk-pq7mp 7 ай бұрын

thank you brother@@frizzellracing

@EhButU Жыл бұрын

So are you saying to take a reading, put in a clean set of plugs, drive along to a parking bay, shut off engine instantly, remove those plugs and then have them cut open to read them. Can those plugs be used again once cut through the metal sleeve to cut open ?

@frizzellracing Жыл бұрын

No once you cut a set of plugs they are trash. Now if you can get a light or maybe something that you can see the bottom of the porcelain you may be able to see the fuel line without cutting it. But I air on the side of caution and just cut one. But yes.. you need as little idle time as possible to accurately read a plug. Idle time will show slightly richer than it’s actually running

@mikeyb1835 2 ай бұрын

Which do you prefer Autolite or NGK. Most guys say that the NGK’s are much easier to read. Wanted to get your opinion. Thanks great video

@frizzellracing 2 ай бұрын

So I actually run both. And I like both. As for reading them there isn’t a ton of difference it really depends on the plug. For example a FE plug is short and fat so you can see down in the “hole” really easy. But a Windsor plug Is deep and skinny and for whatever reason it does seem like you can see the porcelain better on the NGK. But a lot depends on the style plug you have.

@mikeyb1835 Ай бұрын

Yeah, that makes sense. I’m running all Windsor stuff a little more difficult to see down in there. Thanks

@frizzellracing Ай бұрын

@@mikeyb1835 happy to help. Thanks for watching

@7080nik 10 ай бұрын

The very best engine builders in the country will tell you to READ THE PLUGS then use O2 and EGT sensors for reference. ABOVE ALL, read the plugs!

@billward4418 10 ай бұрын

How long you run with new plugs before you read e

@frizzellracing 10 ай бұрын

If your trying to read the plugs for tuning you should put a set in, run it down the road , track whatever and pull them and read them. You want a little idle time as possible