Splitfire Plugs
Thread Starter
Instructor
Joined: Jan 2006
Posts: 130
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From: Bend Oregon
Splitfire Plugs
Anybody here partial to Splitfire plugs? I ran them in my '92 Camaro years ago and you could feel the difference, albeit slight. What wires would be good to run either way...
Race Director
Joined: Sep 1999
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From: CONCORD NC
I think plugs have come a long way, and can handle larger plug gaps with the awesome voltage modern coils provide (3-4 times what the old hei system put out). I don't think you'll see much, if any, improvement with splitfires, and they also likely won't last as long as the platinum plugs in our cars now.
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I used them in my 65 years ago and there was a noticeable loss in low end torque. They seem to be engineered exclusively for high RPM driving. The consensus among my gear head friends is that they are junk. In the new Vette I would stick with the factory plugs.
Melting Slicks
Joined: Oct 2004
Posts: 2,210
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From: CA
I think the GM engineers put a lot of thought into such things and have designed the engine for the plugs that are installed at the factory for optimimum performance. You can always do a before and after on the dyno if you really want to know.
Team Owner
Joined: Oct 2004
Posts: 27,420
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From: San Clemente CA
Originally Posted by Byrdguy
I don't think changing plugs in any modern vehicle is going to result is any performance improvement. (unless one is replacing extremely worn or damaged ones).
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
heat range is all you should be concered with
Simple logic 101, It doesn't make any difference if you start a forest fire with a match or a blow torch, the fire still starts. Same with plugs. It's your heat range that's important for the life of the plug,and the type of driving you do. All the crap you read about plugs is marketing, making you think one is better than the other. Also if you're looking for a bunch of HP, look somewhere else.
andreas G.
andreas G.
Race Director
Joined: Sep 1999
Posts: 12,422
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From: CONCORD NC
That simple logic 101 isn't necessarily true in older cars. Back in the early engines (pre C5), every spark plug was fired by a single coil. In other words, at 5000rpm, the coil fired 300 times PER SECOND. Trick plugs, both splitfire, as well as some wierd plugs (I used something called Torquemasters in my ZR1), could help with the loss of voltage at high rpms.
Today, with 8 coils, just about any plug can indeed start a forest fire. I personally run a non-platinum plug in my race engines, to get a different heat range, but I think the OEM's are great for street and moderate track use.
Today, with 8 coils, just about any plug can indeed start a forest fire. I personally run a non-platinum plug in my race engines, to get a different heat range, but I think the OEM's are great for street and moderate track use.
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Joined: Dec 2002
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From: San Francisco CA
Save your money they don't work as claimed and you notice now that they have come way down in price. They are made by Autolite..nothing wrong with that but they are just a waste of $$$.
