Bosch Platinum + 4 Plugs
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
the theory is that the 4 unshrouded electrodes give a more uniform flame front and more compleye combustion increasing the energy released in each cylinder ....
Is it real... don't know
Is it real... don't know
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Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by GeorgieMporgie
Can you really get an extra 5-6hp by installing a set of Bosch Platinum + 4 spark plugs? 
I use the NEW recommended AC/Delco Iridium that is pre-gapedMy $.02
Instructor
Joined: Feb 2005
Posts: 238
Likes: 0
From: Michigan
An explosion is not an explosion. A lot of Research is done by oil companies and fuel additive companies to try and obtain a more uniform flame front in the combusiton chamber to increase complete combustion....
Incomplete combustion is why catylitic converters exist and so many Forum members worry about passing a sniffer (SMOG) test.
The more uniform the flame front, the more complete the combustion ... the more power and less residual hydrocarbons.
Racers have been using "cutback" plugs for years to increase horsepower. That is the theory behind the +4's 4 cutback electrodes to unshroud the spark and permit more complete combustion.
Whether it works is another matter...
Incomplete combustion is why catylitic converters exist and so many Forum members worry about passing a sniffer (SMOG) test.
The more uniform the flame front, the more complete the combustion ... the more power and less residual hydrocarbons.
Racers have been using "cutback" plugs for years to increase horsepower. That is the theory behind the +4's 4 cutback electrodes to unshroud the spark and permit more complete combustion.
Whether it works is another matter...
Le Mans Master
Joined: Nov 2000
Posts: 6,266
Likes: 156
From: Galloway Twp. NJ
Cruise-In VII Veteran
I know that I LOST power using them! 
there's nothing better than a good old fashoned copper plug for performance!
that's why I'm using NGK TR-55 plugs, and the NGK plugs only cost about $13.00 for the set, as opposed to the Bosch +4's that cost about $13.00 each! 
there's nothing better than a good old fashoned copper plug for performance!
that's why I'm using NGK TR-55 plugs, and the NGK plugs only cost about $13.00 for the set, as opposed to the Bosch +4's that cost about $13.00 each!
Drifting
Joined: Aug 2005
Posts: 1,297
Likes: 0
From: Menands (Albany) NY
Nope..
Originally Posted by 88redvert
An explosion is not an explosion. A lot of Research is done by oil companies and fuel additive companies to try and obtain a more uniform flame front in the combusiton chamber to increase complete combustion....
Incomplete combustion is why catylitic converters exist and so many Forum members worry about passing a sniffer (SMOG) test.
The more uniform the flame front, the more complete the combustion ... the more power and less residual hydrocarbons.
Racers have been using "cutback" plugs for years to increase horsepower. That is the theory behind the +4's 4 cutback electrodes to unshroud the spark and permit more complete combustion.
Whether it works is another matter...
Incomplete combustion is why catylitic converters exist and so many Forum members worry about passing a sniffer (SMOG) test.
The more uniform the flame front, the more complete the combustion ... the more power and less residual hydrocarbons.
Racers have been using "cutback" plugs for years to increase horsepower. That is the theory behind the +4's 4 cutback electrodes to unshroud the spark and permit more complete combustion.
Whether it works is another matter...
Show me one piece of independent research, which gives even 1 HP...I don't believe it..sorry..
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
I have never seen any documented evidence, or proof, that spark plugs, from different manufacturers even, of the proper physical size and length, heat range and gapping, provide any discernible performance difference over another, other than longevity due to material composition. That is why I chose to go with the GM 41-985 Iridiums....long life without having to change them out frequently. Each to their own.
Ed
Ed
Pro
Joined: Aug 2004
Posts: 575
Likes: 0
From: Richmond Hill Ontario
I replied to a similar post a while back so if you do a search under tech for Bosch plugs or my name you'll see it. In a nutshell, it's all marketing hype generated to push a new product. The design has been around for a long time and used as a way to increase plug interval changes in huge industrial engines mainly used in the gas fields to generate electricity. Save your money.
Intermediate
Joined: Sep 2005
Posts: 26
Likes: 0
From: Montana
I’m thinking…. If you believe that electricity takes the path of least resistance, then you would also have to believe that each of the 4 electrodes would have to be precisely the same in both mass and gap. If they are not the same, the plug will fire on the least resistant electrode each time. 
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by GeorgieMporgie
Can you really get an extra 5-6hp by installing a set of Bosch Platinum + 4 spark plugs?
Melting Slicks
Joined: Nov 2003
Posts: 3,396
Likes: 2
From: North Manchester Indiana
Oh,, you gotta use them with the tornado intake dealy ,, and magic engine lube and a can of restore to get full effect.
IMHO,,, use a good NGK...or Nippondenso ,, the gimmicks are, well, gimmicks in my book.
IMHO,,, use a good NGK...or Nippondenso ,, the gimmicks are, well, gimmicks in my book.
Drifting
Joined: Aug 2005
Posts: 1,297
Likes: 0
From: Menands (Albany) NY
Originally Posted by wrustywrench
Oh,, you gotta use them with the tornado intake dealy ,, and magic engine lube and a can of restore to get full effect.
IMHO,,, use a good NGK...or Nippondenso ,, the gimmicks are, well, gimmicks in my book.
IMHO,,, use a good NGK...or Nippondenso ,, the gimmicks are, well, gimmicks in my book.
