[ryans88gt]

Originally Posted by Darrell I've been told buy several engine builders that platinum plugs have no place in a performance engine because platinum is a poor conductor of electricity which is why they last forever because they don't wear much. I'm sure someone else can touch on this that is in the chemical field. Ryan or someone here had a degree in chemistry or something like that I think I remember seeing somewhere. The iridium plugs are a joke too. Joe Sherman tried a set at the engine masters challenge because Denso was a sponsor and he lost 8 horsepower.

Platinum is an inert metal (non-reactive) that is fairly hard, that is why they use it in plugs, it last a long time. Also, it has a poor specific heat, and transfers heat energy slowly. That is why they have no place in performance engines. The electrode gets hot hot hot and then causes detonation in performance engines.

[HMUSN]

since when is a stock 5.0L a performance engine?


if you plan on using plat plugs for longer use.. go for it.. just don't toss a blower on your car or put heavy bolt on's on her.

[WAR-PARTY]

Sorry Darrell, I'm thowing down with U on this subj
LOL W>P>

[ryans88gt]

Originally Posted by WAR-PARTY As for resistance: not much ore than copper...

By your numbers the resistance is 10 times more (the all important exponent).

Also this is at 20 degrees C, your combustion chamber is more like 1000 degrees C, so expect that difference to be more like 100 to 1000 times more resistance.

Temperature and resistance are proportional.

[tehdwarvenn]

so why dont we just come to a conclusion... what MATERIAL spark plugs? not what brand.

Are those non-adjustable iridium ones pretty good? the little 4 prong ones, i heard they spark pretty hot (good for stock performance)

[TENGRAM]

autolite, AR25. $1.50 each and works as well as any other. no need to bust open the piggy bank in this area yall. if there is a difference from any plug to another (within the same heat range) it is a negligible difference and not worth the difference in price.


buying "unobtainium 15 electrode spark plugs with ESP technology" is akin to buying a bassani x-pipe over a brand that cost half as much. how much difference do you think it could really make? is it worth the $200-300 price difference? IMO hell no! spend your money buying better parts where it actually makes a difference. my2cents anyway

[imported_Gt_Jay]

what if you have a turbo??

[Stangzilla]

I use NGK V-Power. Never had a problem.

[ryans88gt]

Autolite, they are the same brand as motorcraft. They are cheap and have copper electrodes. They are available in almost every heat range. They are what most performance FORD engines use.

[TurboLX]

Originally Posted by imported_Gt_Jay what if you have a turbo??

there all pretty much the same, i run motorcraft plugs in both of my cars with MSD kits

[1slo5.0]

Originally Posted by WAR-PARTY I want to use Bosch Spark Plugs, but have modified my engine by adding a performance system. Can I still use the plug listed in the catalog for my vehicle? Does technology used in racing plugs find its way into Bosch Premium plugs?YES! Racing, as it has for 100 years, provides a great developmental impetus and test bed for spark plug durability and performance, and what is learned at Indy or Darlington, or Le Mans helps improve the spark plugs installed in today’s cars or trucks. From the first Indy 500 won by Ray Harroun’s Marmon Wasp to the last 17 Indy 500 winners, and many in between, each have used Bosch spark plugs. Many premium passenger car spark plugs use multiple ground electrodes and precious metals, such as platinum, which are a direct result of their development and testing in long distance racing. If you have modified your engine with a performance system such as a turbocharger, supercharger, or nitrous, the recommended spark plug may not be correct. You may need to use a plug with a colder heat range to compensate for the additional heat generated by the engine. Bosch recommends that in these situations, you consult a qualified engine builder for assistance in determining the appropriate heat range. As for resistance: not much ore than copper... MaterialResistivity (Ωm) at 20 °CCoefficient*ReferenceSilver1.59×10−8.0038[1]Copper1.7×10−8.0039[1]Gold2.44×10−8.0034[1]Aluminium2.82×10−8.0039[1]Tungsten5.6×10−8.0045[1]Brass0.8×10−7.0015Iron1.0×10−7.005[1]Platinum1.1×10−7.00392[1]MaterialResistivity (Ωm) at 20 °CCoefficient*ReferenceSilver1.59×10−8.0038[1]Copper1.7×10−8.0039[1]Gold2.44×10−8.0034[1]Aluminium2.82×10−8.0039[1]Tungsten5.6×10−8.0045[1]Brass0.8×10−7.0015Iron1.0×10−7.005[1]Platinum1.1×10−7.00392[1]

That is from the Bosch website. Unfortunately every company will tell you that their product is the best for every intended application. We need to find some third party input from engine builders, Nascar teams, etc. Those are the people that have experience with the product in performance applications and will have an honest "nothing to gain" answer.

[1slo5.0]

Originally Posted by ryans88gt Platinum is an inert metal (non-reactive) that is fairly hard, that is why they use it in plugs, it last a long time. Also, it has a poor specific heat, and transfers heat energy slowly. That is why they have no place in performance engines. The electrode gets hot hot hot and then causes detonation in performance engines.

Thanks Ryan, that was the info I was looking for.

[1slo5.0]

Originally Posted by WAR-PARTY Sorry Darrell, I'm thowing down with U on this subj LOL W>P>

Its a discussion, not a street fight. Its cool dude.

[1slo5.0]

Originally Posted by tehdwarvenn Are those non-adjustable iridium ones pretty good? the little 4 prong ones, i heard they spark pretty hot (good for stock performance)

Originally Posted by Darrell The iridium plugs are a joke too. Joe Sherman tried a set at the engine masters challenge because Denso was a sponsor and he lost 8 horsepower.

..

[78mach1]

Originally Posted by Darrell I've been told buy several engine builders that platinum plugs have no place in a performance engine because platinum is a poor conductor of electricity which is why they last forever because they don't wear much. I'm sure someone else can touch on this that is in the chemical field. Ryan or someone here had a degree in chemistry or something like that I think I remember seeing somewhere. The iridium plugs are a joke too. Joe Sherman tried a set at the engine masters challenge because Denso was a sponsor and he lost 8 horsepower.

you hit it right on the money!, platnium is a horrible conductor, thats just a sales pitch that they use to sell to kids with hondas

a speark plug is a spark plug but like darrel said, " autolite, NGK, champion"

those have been around forever and they dont try to sell bull s***, you cant go wrong with them

and there isnt a spark plug out there that improves throttle response

[78mach1]

and the ones with multiple prongs are a joke to!

its still the same amount of spark jumping the airgap

and the electrons are always going to jump the prong with the less resistance!

so there for your paying $10 more for 3 extra prongs that you arent going to use

its all b.s.

[1slo5.0]

Originally Posted by 78mach1 and the ones with multiple prongs are a joke to! its still the same amount of spark jumping the airgap and the electrons are always going to jump the prong with the less resistance! so there for your paying $10 more for 3 extra prongs that you arent going to use its all b.s.

That is the thing alot of people don't understand. Electricity takes the path of least resistance and you are only going to have one spark no matter how many ground electrodes are on the plug. When Splitfire first hit the scene they had salesman giving us the sales pitch that they had two sparks because of the split ground electrode. They were trying to convince us to carry their product. Either these guys were lying fools or they were sleeping in science class.

[78mach1]

Originally Posted by Darrell That is the thing alot of people don't understand. Electricity takes the path of least resistance and you are only going to have one spark no matter how many ground electrodes are on the plug. When Splitfire first hit the scene they had salesman giving us the sales pitch that they had two sparks because of the split ground electrode. They were trying to convince us to carry their product. Either these guys were lying fools or they were sleeping in science class.

hahaha i sleep in science class to!