I posted this on the NLOC board but nobody answered so I will try again here.

Here's a good question. It is common knowledge amongst supercharged Mustang tuners that the best way to go is with a standard Autolite/Motorcraft plug about 1 heat range cooler than stock. I have been told almost universally never to use a platnum or splitfire plug on my supercharged stang. I guess the reason is that they tend to foul easily. So why is it that the supercharged Lightnings tend to like these kind of plugs? Somebody please enlighten me!!

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90 LX Mustang 5.0
-ATI Dominator D1B S/C 14 psi
-TFS Twisted Wedge Heads
-GT40 Intake
-BBK Shorties
-E303 cam
-70 mm TB
-75 mm MAS
-MSD 6 BTM
-Tremec
-Aeromotive fuel system
-3.55 gears
(505 rwhp , 495 ft-lbs)

2001 White Lightning
-magnaflow 12468

 

haha, actually it's like having a 4 valves per cylinder or something like that.

Adam
01 Black Lightning - JDM 'FlipChipenfiltered','Straightpiped', 'splitfired', 'billetted', 'Neoned', and 'Grooved' thanks to Blaupunkt, Alpine, Sony, Clarion, Dynomat, and MTX

 

No, its more like adding a second supercharger and twin turbos to your truck!

Should be good for 500hp.



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2000 Red Lightning
BedRug
95 Saleen S-351 Convertible/Triple Black
97 Kawasaki Vulcan 800 Classic

 

I can't go back, i won't go go back!

 

I don't know why SVT chooses the platinum plugs, but they work for most of us. Had to be a reason and they don't seem to hurt performance.

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99 Lightning, JL Ram Air, Daiblo Chip(JL Programmed)and 90mm MAF,JL Power Cooler, Level 10 shift kit,PSP Lower pulley, Single Blade T/B, Bassani exhaust, . 12.42 at 109.6..Full trim and stock convertor, MT Street ET's.

 

I will...

95 Saleen, I think you mixed up the splitfires and "type-r" sticker, the "type-r" sticker is worth about 500 ponies and the splitfires turn your engine into a VTEC.

Adam
01 Black Lightning - JDM 'FlipChipenfiltered','Straightpiped', 'splitfired', 'billetted', 'Neoned', and 'Grooved' thanks to Blaupunkt, Alpine, Sony, Clarion, Dynomat, and MTX

 

OK ... more science please!!! Still nobody seems to know the answer and yes I looked at the other threads but question is still unanswered.

Maybe I should try splitfires in my Mustang even though at least 20 people have told me to stay away from them if you have a supercharger.

 

I put one in my lawnmower and now the high grass goes down "noproblemo"

 

DJANIMATE:

I stand corrected. But I was almost positive that it was the random japanese characters that turned your engine into a V-Tec?

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2000 Red Lightning
BedRug
95 Saleen S-351 Convertible/Triple Black
97 Kawasaki Vulcan 800 Classic

 

95 Saleen, haha - I see those things in the auto parts store and I crack up "Powered by {random Japanese letters}". I think anyone who buys one of those should be taken to the back room and given a good Singapore style whoopin.

MRBBQMAN - Does that lawnmower have a blower on it? what about a chipenfilter?

ATI,
Sorry your serious question turned into 'amateur night at the Apollo' (me included), I run splits on my Lightning and I love them. I think the reason they say not to run them is because they burn real hot and you can actually melt them with the addition of a turbo/supercharger. At least one guy has melted some on his L but I've been checking mine and have had no problems. I've been told if your running real lean like from a chip you could have problems.

Adam
01 Black Lightning - JDM 'FlipChipenfiltered','Straightpiped', 'splitfired', 'billetted', 'Neoned', and 'Grooved' thanks to Blaupunkt, Alpine, Sony, Clarion, Dynomat, and MTX

 

how lean would you be running with a 100dry system. i have bad hearing, but my a/f gauge and splitfire plugs say i'm ok

 

MRBBQMAN,

I went back to test the Autolite 103 plug which performed well. I could only hold out a 1,000 miles before a fresh set of Splitfire SF10D's went back in. All was right with the world again, LOL. I even got a $1.00 rebate on each plug after printing the rebate coupon from their web site. Rebates usually take forever but I received a check in less than 3 weeks. I couldn't believe it.

ATIDominator,

If you are not having pinging problems or maybe running nitrous on the lean side then Splits would be the best running plug you could put in a Gen2 L. I don't think the Splits can handle the heat as well as a solid ground electrode and will fail quicker under these conditions. If you are running on the ragged edge and hear ANY detonation then buy a plug with a solid ground electrode with a little luck maybe it won't fail. If you don't fit into this catagory then the Splits will offer you the best daily driving experience with better throttle response.

------------------
Later,
Chuck
Black 00
Chuck's Lightning Page

 

ATI,

I think the reason no one answered you is because this topic has been brought up so many times, do a search and you'll find hours of fine reading material.

Adam
01 Black Lightning - JDM 'FlipChipenfiltered','Straightpiped', 'splitfired', 'billetted', 'Neoned', and 'Grooved' thanks to Blaupunkt, Alpine, Sony, Clarion, Dynomat, and MTX

 

i use splitfires, because of their special patented twin spark design, it's like having a 16 cylinder engine, or something