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-   -   The Truth About Spark Plugs.... (http://www.tacomaworld.com/forum/technical-chat/152726-truth-about-spark-plugs.html)

chris4x4 04-20-2011 08:10 AM

The Truth About Spark Plugs....
 
Thought you all should read this.

Quote:

I'd like to dispel a couple of automotive myths and in the process perhaps save you a few dollars. Expensive spark plugs do not increase your vehicles performance and power. Regular replacement does. While using a premium platinum plug will extend the service life of the plug, it will not in any way increase performance or power either.

The only realistic advantage of any premium platinum plug is a decrease in gap erosion. Gap erosion occurs when the spark burns away small bits of the electrode and ground contact during combustion. Over time a properly gapped plug will slightly increase it's gap but not generally enough to cause any problems if the plugs are replaced in accordance with the manufacturers suggested maintenance routine. So the extra dollars you pay for these kinds of plugs are truly wasted if you are a responsible vehicle owner who changes the plugs regularly like you should.

I know many of you have heard and seen advertisements from ignition component manufacturers claiming their "special" plug design increases spark duration or voltage which is absolute nonsense. I've personally tested over thirty brands of spark plugs in both new and used engines using both a Sun scope and a bear engine analyzer. Not one "premium" or "performance" plug showed any improvement in spark trace, voltage or duration of spark and several showed faults not present when using standard stock replacement parts.

One prime example is the fraudulent campaign of a company I won't mention claiming to increase performance by using a V shaped electrode which they say (And show in their advertisements) creates "two" sparks during combustion thereby causing an increase in combustion output and more complete combustion in the chamber. One word. BULL. Any professional worth his weight can tell you that once combustion has begun, that's it. Everything else affecting combustion will be determined by the engines compression, timing and fuel mixture. You can't ignite the fuel mixture twice. Once it explodes, it's spent. So even if there was a second spark it would be attempting to ignite inert gases that no longer contained any combustible fuel, or, in the event of an inefficient combustion chamber (Due to bad valves, rings or worn cylinder walls.)any remaining usable fuel mixture would be pushed out the exhaust valve during the exhaust stroke of the engine.

Here's another one. "Our plug has a higher voltage which increases the sparks efficiency." Bull. I've tested factory and aftermarket coils vs. "performance" ignition coils and the stock coils consistently produced higher and more sustained voltages than the supposedly performance ones every time. The voltage that is sent to the plug will be the only determining factor of spark voltage in an otherwise properly performing engine, meaning as long as the plug gap, vehicle electrical system and the rest of the ignition system components are working properly, there can be no increase in spark voltage no matter what kind of plug you are using. Problems in plug gap, coil integrity, plug wires and cylinder compression are the determining factors at play. Any of these could contribute to spark pooling though. This condition is usually due to increased voltage needed to jump an improperly gapped plug, improper cylinder compression or to overcome a badly grounded plug and adversely affects performance. Inefficient combustion or misfiring may result as well.

Keep your engine and your wallet happy by installing properly gapped, stock or quality replacement spark plugs at the required intervals. Having been in this business for more than ten years I will generally use either AC, Motorcraft or Bosche Super spark plugs depending on the application and what's available at my favorite parts house. In many cases these plugs are actually less expensive and generally more reliable than those "other guys" products.
Another thing that wasnt mentioned, Electircity follows the path of least resistance. So, "E", "V", etc. plugs STILL are only going to generate 1 spark.


Recomended plugs:

First gen.

2RZ-FE & 3RZ-FE engines:

Denso K16R-U11

NGK BKR5EYA-U

Gap .043"

5VZ-FE engine:

Denso K16TR11

NGK BKR5EKB-11

Gap .043"


Second gens:

2TR-FE engine

Denso SK20HR11

NGK ILFR6C11

Gap .039" to .043"

1GR-FE engine

Denso K20HR-U11

NGK LFR6C-11

Gap .039" to .043"

Davtopgun 04-20-2011 08:19 AM

Damn good info! I'll be replacing mine this weekend, thanks Chris!

mjp2 04-20-2011 08:20 AM

:thumbsup:

REX_111_MDG_BMET 04-20-2011 08:22 AM

Where did you find this?

1TUFFTRD 04-20-2011 08:26 AM

Nice!!!

BlueT 04-20-2011 08:56 AM

Quote:

Having been in this business for more than ten years I will generally use either AC, Motorcraft or Bosche Super spark plugs depending on the application and what's available at my favorite parts house. In many cases these plugs are actually less expensive and generally more reliable than those "other guys" products
I agree with everything except
Hmmm I dont know about this. He is recommending AC, Motorcraft as more reliable then "other guys" ?

AC Delco and Motorcraft are $hietest spark plugs person can buy. And I mean if there was award for crappiest quality spark plug those two would probably get it every year. Thats my experience with them.

mjp2 04-20-2011 08:58 AM

Quote:

Originally Posted by BlueT (Post 3059890)
Hmmm I dont know about this He is recommending AC, Motorcraft as more reliable then "other guys" ?

AC Delco and Motorcraft are $hietest spark plugs person can buy. And I mean if there was award for crappiest quality spark plug those two would probably get it every year. Thats my experience with them.

What specific issues have you had with them relative to other brands?

chris4x4 04-20-2011 08:59 AM

Quote:

Originally Posted by BlueT (Post 3059890)
I agree with everything except
Hmmm I dont know about this. He is recommending AC, Motorcraft as more reliable then "other guys" ?

AC Delco and Motorcraft are $hietest spark plugs person can buy. And I mean if there was award for crappiest quality spark plug those two would probably get it every year. Thats my experience with them.

Im sure its his opinion for his application. I doubt he is recomending them for Toyotas.

medic2230 04-20-2011 09:01 AM

I put the toyota platinum ones in mine and the damn thing is skipping now. Should have just gotten the cheapo $13 originals.. :(

kmok 04-20-2011 09:10 AM

Good info!

chris4x4 04-20-2011 09:17 AM

Quote:

Originally Posted by medic2230 (Post 3059923)
I put the toyota platinum ones in mine and the damn thing is skipping now. Should have just gotten the cheapo $13 originals.. :(

What was the gaps? Did you make sure the coil packs were installed securly?

Snowman 04-20-2011 09:17 AM

It doesnt matter how many reviews and data there is, people still wont believe it. Just about everyone on TW says you MUST use the dual electrode plugs or your tacoma will get 2mpg and may possibly explode. BS

I bought the NGK copper plugs that were on sale. Work great, no mileage or performance issues whatsoever.

chris4x4 04-20-2011 09:19 AM

Quote:

Originally Posted by Snowman (Post 3059999)
It doesnt matter how many reviews and data there is, people still wont believe it. Just about everyone on TW says you MUST use the dual electrode plugs or your tacoma will get 2mpg and may possibly explode. BS

I bought the NGK copper plugs that were on sale. Work great, no mileage or performance issues whatsoever.

For the first gens, the ignition is designed to be used with the dual electrode plugs. Best performance is achieved with these. Some have had issues useing single electrode plugs, while some havent.

medic2230 04-20-2011 09:20 AM

Quote:

Originally Posted by chris4x4 (Post 3059997)
What was the gaps? Did you make sure the coil packs were installed securly?

Going to pull them and check the gap. Coil packs were on good. Got me???? It didn't start till I put them in.

chris4x4 04-20-2011 09:23 AM

Quote:

Originally Posted by medic2230 (Post 3060008)
Going to pull them and check the gap. Coil packs were on good. Got me???? It didn't start till I put them in.

may have a bad plug. Worst case, Swap in the OEM Denso's

scocar 04-20-2011 09:26 AM

Is this an attempted pre-emptive strike on all the retarded spark plug threads that haven't yet been (but inevitabely will be) posted?

No offense meant to the retards.

Oh, while I am at, should I change my synthetic oil every 3,000 miles?

OK, on a more serious and constructive note, since this is a sticky, you may consider adding the stock spark plug models/numbers for all the Tacoma engines, since I imagine you can proabably do it off the top of your head in about 2 seconds.

That is, if you aren't too busy or something, like chasing off OZ or deleting "I am asshurt and sicking my lawyers on TW" threads. Or making virtual sammiches. Sir.

chris4x4 04-20-2011 09:29 AM

Quote:

Originally Posted by scocar (Post 3060050)
Is this an attempted pre-emptive strike on all the retarded spark plug threads that haven't yet been (but inevitabely will be) posted?

No offense meant to the retards.

Oh, while I am at, should I change my synthetic oil every 3,000 miles?

OK, on a more serious and constructive note, since this is a sticky, you may consider adding the stock spark plug models/numbers for all the Tacoma engines, since I imagine you can proabably do it off the top of your head in about 2 seconds.

That is, if you aren't too busy or something, like chasing off OZ or deleting "I am asshurt and sicking my lawyers on TW" threads. Or making virtual sammiches. Sir.

I might, But all that info is in everyones owners manual.

eccracer104 04-20-2011 09:31 AM

:anon: I like the plugs that are $30 each with diamonds and gold and titanium to make them lighter weight for better weight saving performance, higher HPs (whatever those are) and more MPGs (like a Prius!).





JK. I get 6 stock NGKs from the dealership and they work flawlessly!

scocar 04-20-2011 09:37 AM

Quote:

Originally Posted by chris4x4 (Post 3060067)
I might, But all that info is in everyones owners manual.

Yes, but there are lots of first genners who buy used trucks that didn't come with the OM (because I have responded the same way to similar questions, from octane to grease type to capacities).

Just a thought. I won't even mention "search." That's just too hard.

Lord Micron 04-20-2011 09:42 AM

Good read, which pretty much covers common sense!

Though something of note that I've dug into since I'm in need of a plug change soon:

Enerpulse, makers of Pulstar, who proclaim everywhere they're Made in the USA may have been made in New Mexico at one point... now they've just dropped the "New" and have Autolite make them south of the border. Their proclaimed Sandia National Laboratories collaboration has yet to be quantified... They claim it was spurned from Z-Machine research, which Sandia's site says nothing of their collaboration -- And everything they try to make claims of falls directly in the snake oil category. :crapstorm:


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