Bosch platinum 4
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More Turbo
Joined: Aug 2000
Posts: 721
Likes: 1
From: Floyd, Va
Bosch platinum 4
I posted this in the aftermarket forum, but wanted your take on this.
Is this just a gimmick? I dont see how this could help much.
Electricity takes the less resistant path to ground. I find it hard to believe that every prong is exactly the same distance and resistance as the others. The ones that arent being used, will foul and become more resistant.
Amps and voltage make spark, by dividing up the spark youre getting less amps per prong. You arent getting any more spark than you had before, just moving it.
I am not wanting to hear about how much it helped your milege, or how much more power you have, unless you have done a dyno. Im just looking for an explaination of how this works better than a regular plug.
Thanks
Tony Warren
Nebraska
Is this just a gimmick? I dont see how this could help much.
Electricity takes the less resistant path to ground. I find it hard to believe that every prong is exactly the same distance and resistance as the others. The ones that arent being used, will foul and become more resistant.
Amps and voltage make spark, by dividing up the spark youre getting less amps per prong. You arent getting any more spark than you had before, just moving it.
I am not wanting to hear about how much it helped your milege, or how much more power you have, unless you have done a dyno. Im just looking for an explaination of how this works better than a regular plug.
Thanks
Tony Warren
Nebraska
Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
Bosch platinum 4
I know that Bosch plugs run too HOT in a 3.0L Ranger. Plug
heat range is the most important plug parameter, and for the
correct heat range, stay with Motorcraft plugs....And on top of
that, with the spark polarity of EDIS, use Motorcraft double
platinums.....
heat range is the most important plug parameter, and for the
correct heat range, stay with Motorcraft plugs....And on top of
that, with the spark polarity of EDIS, use Motorcraft double
platinums.....
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
Bosch platinum 4
I was browsing through some old posts and ran across yours about the bosch plat 4 and your question on how they work. Its an old post, but I'll go ahead and reply because it doesn't look like you got an answer. Its not about more electrodes equal more electrical paths, as is commonly thought. Many think that this is the case, thus these plugs are bogus, since electricity takes the path of least resistance. Its really about unshrouding the spark kernal to the combustion chamber, the same theory driving splitfire plugs design. This is actually a valid theory, which is why racers index and/or sidegap their sparkplugs. BUT, there hasn't been any solid proof that these type plugs give us any benefit in our engines. In fact, the platnium plugs will run too hot with a really good ignition, why is why MSD recomends against them. So, its not about the path of electricity, but maximum exposure of the spark kernal to combustion gasses. Hope that helped.
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