What are the factory spark plugs?
Most original equipment spark plugs today are platinum or iridium and have a recommended replacement interval of 100,000 miles.
How do I know what spark plug I have?
The different types of spark plugs can seem overwhelming at first, but the simple way to find out what kind of spark plug you need is by checking your owner's manual. The manual will specify the right plugs for your vehicle.
Does upgrading spark plugs increase HP?
When you change your worn-out spark plug with fresh spark plugs, you'll notice a much faster engine response when driving. While spark plugs don't technically increase your engine's horsepower, they bring it back to its optimal combustion level.
Does upgrading spark plugs do anything?
Starting your car in the winter Winter starts can seriously decrease your car's performance, and also run the risk of spark plug fouling. Upgrading your spark plugs to an Iridium fine wire plug will provide instant starts in cold weather and help eliminate the risk of fouling.
Which is better copper or iridium spark plugs?
Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs. In reality, copper has the best performance of all three and the worst longevity.
Are silver spark plugs the best?
Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium. Silver spark plug electrodes transfer electricity & heat better than any other spark plug material resulting in the most powerful spark!
Why are NGK spark plugs better?
Modern engines demand more power while using less fuel, shortening the life of traditional iridium and platinum spark plugs. NGK's patented ruthenium technology stands up better to wear to bring maximum durability and performance to your engine.
Should I use OEM spark plugs?
OEM Spark Plugs are More Durable Than Aftermarket Spark Plugs. You never have to worry about your OEM spark plugs fizzling out early. The high quality materials and top workmanship guarantee structural integrity and longevity. Aftermarket spark plugs are usually cheaper than OEM plugs.
Should I run a colder or hotter spark plug?
When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.
Do NGK spark plugs add horsepower?
In short, yes, in some situations spark plugs can increase horsepower.
What spark plug gives the most horsepower?
If you want spark plugs for better performance and buttery smooth idling, then Iridium plugs are the perfect choice. Prepare to pay up to three times (or more!) for Iridium vs Platinum, but they'll usually last longer, deliver more horsepower and breathe new life into your car!
What is better platinum or iridium spark plugs?
Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.
Six Cylinder 4.2 Liter Jeep engine Specs
The popular AMC 258 inline 6 4.2L engine was introduced back in 1971, and was used in various pickups and Wagoneers. In 1972 the engine was avaliable in Jeep CJs, and eventually made it's was into Wrangler YJs until it was phased out.
Re: Six Cylinder 4.2 Liter Jeep engine Specs
Coverted my 1986 AMC Eagle to Howell TBI fuel injection last year. Ended up with a much better running engine and a garbage can full of useless hoses and emmisions control junk. I understand AMC was about to move all it's cars to FI when the company folded in 88.
Re: Six Cylinder 4.2 Liter Jeep engine Specs
They had TBI in '86 (My Comanche 2.5L has it) and were about to put it into the Eagle SX4s but when Chrysler took over, they nixed the idea and designated the AMC version of the Eagle to the trash pile, then sold the name to Eagle Mitsubishi a couple years later.
Re: Six Cylinder 4.2 Liter Jeep engine Specs
Yuk! I have the 258 I-6... I went witrh the offenhauser intake mani, Holly truck avenger (I jetted it down to about 270) pacesetter headers with magna flo exhaust. It now runs like a raped ape I love it!
Re: Six Cylinder 4.2 Liter Jeep engine Specs
I have a question about the 4.2L I6. I noticed TerryMason posted specs for auto and manual trannies for that engine. Does anyone happen to know what automatic transmission bolts to that. I have a 1990 Wrangler YJ. Transmission went out and all i am finding are manuals. Any info would be great! THANKS
NGK Spark Plugs GR4 - NGK V-Power Spark Plugs
Spark Plug, V-Power, Gasket Seat, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each
MSD Ignition 37314 - MSD Iridium Spark Plugs
Spark Plug, Iridium Core, Gasket Seat, 14mm Thread, 0.750 in. Reach, Projected Tip, Resistor, Set of 4
E3 Spark Plugs E3.58 - E3 Spark Plugs
Spark Plug, E3, Gasket Seat, 14mm Thread, 0.750 in. Reach, Projected Tip, Resistor, Each
Champion Spark Plugs 405 - Champion Copper Plus Spark Plugs
Spark Plug, RN14YC, Copper Plus, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each
ACDelco 19354422 - ACDelco Conventional Resistor Spark Plugs
Spark Plug, Conventional Resistor, Nickel Alloy Tip, Gasket Seat, 14mm Thread, Each
Champion Spark Plugs 3405 - Champion Platinum Power Spark Plugs
Spark Plug, Platinum Power, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each
NGK Spark Plugs GR4GP - NGK G-Power Platinum Spark Plugs
Spark Plug, G-Power Platinum, Gasket Seat, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each
