I had a 96 thunderbird with a "bullitt" mustang gt motor and a supercharger. There is no reason to get fancy $10 iridium wallet drain plugs. The NGK platnium plugs I just bought were 3 dollars each. If I am going to invest time pulling plugs out of a motor, I am not going to put the same ones back in. You won't catch me pulling plugs to clean or regap. Most of the new plugs come pregapped, do not gap them, I have messed up the metal tip doing this. In my dodge neons, the thing would love copper Champion plugs. In 99 percent of applications, just stick with the type of metal that the factory uses. My new chevy ecotec Delco plugs are made by NGK, so I replaced with NGK. My Ford Motorcraft plugs are made by Autolite for the most part. Gapping has always been the job of the installer. Because of the many gap sizes required, no one offers spark plugs properly gapped for every application. The car would not run right with anything less. Do Autolite spark plugs come pre-gapped from the factory Autolite and all spark plug manufacturers offer spark plugs pre-gapped in the most popular gap. Do Autolite spark plugs come pre-gapped from the factory Autolite and all spark plug manufacturers offer spark plugs pre-gapped in the most popular gap sizes. Its just that certain brands work better for certain applications.īosch Super plugs were the hot item for my Volkswagen's. Gapping the plugs to your engine’s specifications is important to prevent pre-ignition, detonation, fouling and poor fuel economy. However, a plug may fit hundreds of engines, from cars to golf carts. 038 or whatever factory spec may be,įor the most part, I have not found a plug that is "junk". Autolite spark plugs traditionally leave the factory pre-gapped for their most popular application. 035 and would never notice any difference than if you set them all to. 050 gap without misfires.Īnyway, chances are you could set one plug at. Not all ignitions and setups will allow you to run say a. Unless you are trying to stretch the gap out too far.
#ARE AUTOLITE SPARK PLUGS PRE GAPPED INSTALL#
If I am working on someone elses engine I just look at them quick to make sure they are not slammed shut from dropping and then just install them.įrom what I have seen over the years, with most vehicles that have not been modified run fine on whatever gap comes on the plug. When I am working on my own engines, I also check the gap with feeler gauges. The problem is that one of the two is usually a common stock item where the other one is not. However, a plug may fit hundreds of engines, from cars to.
Many times if you look at NGK's plugs (which imho are the highest quality most reliable plug for ANY application) you will find that they offer their plugs either pre-gapped to a certain spec or un-gapped. Autolite spark plugs traditionally leave the factory pre-gapped for their most popular application. I know that just as you should never seen 25hp or whatever a manufacture may claim their plugs will gain you, you should also not see any real problems caused by a plug that is in the same heat range and dimensions, but I've seen it over and over.
I've seen SOOO many issues with Bosch Platinum's causing driveability problems. Therefore, we have selected quite a few spark plug gap charts and enlisted them to make it easier for you to find them in one place.I've found over and over that Bosch spark plugs are junk, unless you are using the bosch super or whatever their copper plug is. Although the NGK factory will set the gap to a. Hence, we brought a list to give you an idea of what spark plug gaps some brands have. A spark plug part number might fit hundreds of different engines from many different manufacturers. However, the pre-gapped ones are still slightly customizable according to the need. It not only frees you from the hassle of gapping but also prevents creating a mis-gap while DIYing. Nowadays, spark plug manufacturers make their plugs pre-gapped to fit in the exact vehicle it is made for.
Because of the many gapsizes required, no one offers spark plugsproperly gappedfor every application. How does spark plug gap affect performance? Autolite and all spark plugmanufacturers offer spark plugs pre-gappedin the most popular gapsizes. Similarly, more unusual problems like engine misfire, compression stroke, rough idling arise. Whereas a tightened gapping causes weak sparks that lead to ineffective ignition of the air-fuel mixture. For this, in some cases, the ignition system fails if they don’t acquire the needed voltage. Having inappropriate gaps in the spark plugs will malfunction the engine.įor example, if the spark plugs are too widely gapped, then the engine will require more voltage. In the plethora of spark plug brands and their innumerable gap lists, you might get perplexed. After you have decided to buy a set of spark plug for your automobile, the bigger problem arises finding the right gapping for the plugs.
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