Im running Bosch super 4's too, and find them to be at least as good as anything else on the market. They are a very good plug with a good name, and although possibly overkill due to the design, still work perfectly well for me.
yes im running them too. I was a bit put off at first, as i has them in my old escort a few years back. I had trouble with damp starting with them. They seem to be running fine in the cav though
I was told by a mechanic that those Bosch super 4 plugs arnt always better because there is a 4 point spark it gives a weaker spark than a 2 or 1 point spark. Probably not noticable but worth concidering.
I was told by a mechanic that those Bosch super 4 plugs arnt always better because there is a 4 point spark it gives a weaker spark than a 2 or 1 point spark.
Well I brought a set to get me through until a set of Denso Platinums get here from the states.
IMO they're 4-pole design is crud for that very reason. You only need one electrode to spark to. The Bosch super 4 will only spark to the nearest (least resistance path) electrode anyway, you don't get more than one spark.
I'd prefer an open single electrode design anytime, that has a spark which is much more freely surrounded by fuel/air rather than redundant electrodes...
Well I brought a set to get me through until a set of Denso Platinums get here from the states.
IMO they're 4-pole design is crud for that very reason. You only need one electrode to spark to. The Bosch super 4 will only spark to the nearest (least resistance path) electrode anyway, you don't get more than one spark.
I'd prefer an open single electrode design anytime, that has a spark which is much more freely surrounded by fuel/air rather than redundant electrodes...
thats the point - one gap will be better than the others, so it will choose the best one of the 4. As people dont set the gap these days the super4s are you best bet at getting the correct gap
errrrr, sorry, who doesn't set the gap nowadays? Thats the only important part of the plug!! maybe apart from the temperature range. Why is one pole worse than that? It's exactly the same but without the spark shrouding, which seems a bit pants to me. Also, the shortest gap is not always the best!!
Ronald, cheers for the tip. They are coming pre-set for my needs. $5 ea.
errrrr, sorry, who doesn't set the gap nowadays? Thats the only important part of the plug!! maybe apart from the temperature range. Why is one pole worse than that? It's exactly the same but without the spark shrouding, which seems a bit pants to me. Also, the shortest gap is not always the best!!
Ronald, cheers for the tip. They are coming pre-set for my needs. $5 ea.
the only real benifit of the bosch plugs is that they last a bit longer becauase the electrodes get worn down a 4th less than single electrodes although with platinum plugs the difference is negligable. i use bosch s 4.
mat
I had problems with super 4's in my 1.4 16v. 2 of them died on me! Its hard to describe what they went like but when I took them out some of the white part was missing!
I spoke to a electrical diagnostic centre and he said to just use the standard plugs for your engine; that fancy ones can be too efficent and work detrimentally.
I gave up using them. I have not noticead any difference on the road, in mpg or in power on dyno runs. I do not think that Super 4s are worth the extra money. I use NGK std plugs.
It's the first thing I do when I buy new plugs. Take them out the box and check with the old feeler guages that the gap is correct. Do people really not check plug gaps anymore?
Probably for reliability, if an electrode dies, the second electrode can carry on, but I expect it doesn't shroud half as much as the 'super' 4's do...
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