Bosch Platinum +4 Spark Plugs-Any Good?
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I would have a difficult time believing a scam…. Bosh a very reputable company with millions of dollars in research and development…………and not finding an advantage to a multiple "spark" plug….they did, and they sell them.
Spark plugs with only one electrode have a tendency to foul all around the porcelain …except where the spark fires, the position and angle, of the four electrode design, creates multiple spark path, that will cause the spark to jump sideways. This has a self-cleaning effect on the center electrode. IMO they are a very good plug for many different applications…like older cars that can foul plugs. BOSH simply took the physics of firing a plug and made it to clean...pretty inventive.
When you are trying to pass emissions on older equipment it could help.
Spark plugs with only one electrode have a tendency to foul all around the porcelain …except where the spark fires, the position and angle, of the four electrode design, creates multiple spark path, that will cause the spark to jump sideways. This has a self-cleaning effect on the center electrode. IMO they are a very good plug for many different applications…like older cars that can foul plugs. BOSH simply took the physics of firing a plug and made it to clean...pretty inventive.
When you are trying to pass emissions on older equipment it could help.
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They definately made a difference in my little Suzuki Samurai, where every little bit helps. I was able to lean the mixture on the Weber racing carb. Got maybe one or two more hp out of them. And they don't seem to foul as much as the other one's did (autolites I think.) Expensive little buggers though.
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Fbina109
I have 60,000 + miles on a set in my dual cam V-6. They perform great and have lasted very good. The best that I have read talks about there being an advantage to the four prong system in how the spark performs. I would agree go to their site and read what the engineers say. You also might check on racing forums, seems that I have seen them being used in racing vehicles. I repeat I have been very pleased with there performance and life.
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OK, I went to this page: +4... quite amusing, really. Read between the lines and understand it for what they are really saying and what they want from you; your money!
All it says is exactly what I said in my previous post, along with sales jargon.
That's got nothing to do with the plug; that is fundamental physics. It means nothing, only one electrode path is going to be used at any given time and if one provided the path of least resistance once it likely always will.
I don't buy that, A longer gap means a weaker spark unless you supe up your ignition.
Any decent platinum plug should get 50-60k mi.
My uncle swore by the splitfire plugs using the seat-of-the-pants dyno but they are the same thing as the +4's only with half the number of spark paths. Not to mention that the vehicle was just tuned up when the plugs were put in.
All it says is exactly what I said in my previous post, along with sales jargon.
Four ground electrodes provide multiple spark paths which allow the spark to travel the most efficient path
and deliver a longer and more powerful spark than conventional single electrode spark plugs. This offers superior burn characteristics for ultimate engine performance.
Any decent platinum plug should get 50-60k mi.
My uncle swore by the splitfire plugs using the seat-of-the-pants dyno but they are the same thing as the +4's only with half the number of spark paths. Not to mention that the vehicle was just tuned up when the plugs were put in.
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i had a 99ranger supercab with the 3.0v6. at 30k miles i put the regular bosch platinums in. i gained about a mile per gallon increase. got about 25mpg on the highway and about 21mpg in the city. at 80kmiles i switched to bosch platinum +4. fuel economy there was no difference. i did have a smoother idle and better acceleration. 137kmiles those plugs were still in there and good. a platinum plug is not meant for every engine. a +4plug is not meant for every engine. sometimes you have to try a few different things until you find what works best in your vehicle and budget.