Split-fire, Rapid fire, Bosch +4 plugs
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Junior User
Joined: Aug 2004
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Split-fire, Rapid fire, Bosch +4 plugs
Today the lady at the advance auto parts store warned me that rapid fire/split fire plugs would damage my engine if it wasn't a racing engine. Never heard of this. Anyone have any info
Posting Guru
Joined: Sep 2003
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From: Near Wamego KS
Thank her for saving you some money. As Bob says - for the most part its all scams. Platnum plugs help a little, the split fire or quad fires are BS that look good on an animated commercial.
Posting Guru
Joined: Apr 2003
Posts: 1,903
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From: Wyoming
Well, count me in on the +4 plugs. I've run them for years and like them, and this is not on racing engines. More like family trucksters. Why wouldn't having four fresh points for arcing be better than one, although I know only one can arc at a time?
Senior User
Joined: Oct 2003
Posts: 480
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From: Elyria, Ohio
Got same presentation from dealer who took new BOSCH platinum plugs out of family car and replaced with regular plugs and charged me twice as much. Had some reason for platinum plugs deteriorating in older engines (pre-1996). I wrote an email to BOSCH tech service asking for explaination, but apparently they don't feel obligated to defend their product.
Junior User
Joined: Sep 2004
Posts: 55
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From: Norman,OK
Think about it!!!!!!! if you had 4 ways to go and one was easyer would you go that way??? same thing in a spark plug, it will go the easyest way, if it has 4 ways to go, it will go the easyest way, making a better spark!!
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New User
Joined: Aug 2004
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I wouldn't take anything that I heard at a parts store very seriously. I don't want to be sexist, but I have never had a conversation with a women that knew much about cars.
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Post Fiend
Joined: Jan 2004
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From: Northwest, Arkansas
The object is not to create 2 or 3 or 4 arcs but to split the arc. This spreads the flash point out and is supposed to create a better and more complete burn thus giving you a performance boost. How well do they work? I can't say but I have used them and had no problems nor damage to any engine. It's all in preference as to what you want.
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Joined: May 2002
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From: Fraziers Bottom, WV
I used "splitfire plugs" in a Isuzu Trooper 2.8 for years. I did not see any power increase but The MPG did increase about 2 % and the replacement time on plugs decreased. I would replace the OEM replacements at 25-30K miles and the split fires at about 75k.
I have noticed the same with the Bosch platinums have produced the same outcome in my 300 I6.
I have noticed the same with the Bosch platinums have produced the same outcome in my 300 I6.
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