spark plug help needed
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New User
Joined: May 2002
Posts: 9
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spark plug help needed
'89, f-150, 5.0L.
I'm switching to Splitfire plugs.
Their site says a gap of .054, however the stock gap is .042.
Using all stock cap, wires, EECIV
Rather than playing with the gaps I thought I'd ask if anyone has any thoughts on this. At that much more of a gap, I'm not sure I'd get that good of a flame kernal.
I'm switching to Splitfire plugs.
Their site says a gap of .054, however the stock gap is .042.
Using all stock cap, wires, EECIV
Rather than playing with the gaps I thought I'd ask if anyone has any thoughts on this. At that much more of a gap, I'm not sure I'd get that good of a flame kernal.
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
spark plug help needed
Its up to you if you use those plugs or not , But from what Ive seen those plugs are a waste of money . You will do just as well with mileage & performance using the Motorcraft spark plugs and spend less money . If you do use them gap them the same as the stock spark plug .042 - .046 .
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New User
Joined: May 2002
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spark plug help needed
Well, I got a buck fifty rebate on each plug, so I figured, what the heck, let's give 'em a try.
I put one bank in at the stock gap (.042), the other at .050. I'll run them for a month or so and see what the electrodes look like and then decide on the gap or something in between.
I put one bank in at the stock gap (.042), the other at .050. I'll run them for a month or so and see what the electrodes look like and then decide on the gap or something in between.
Posting Guru
Joined: Dec 2001
Posts: 2,017
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From: Southeast FLA
spark plug help needed
my thinking would follow that if you still had your stock TFI coil, it's probably about time to change it out anyway - so I would get the MSD TFI coil (a better design) and go for the larger gaps.
Senior User
Joined: Nov 2001
Posts: 275
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From: Warner Robins, GA
spark plug help needed
I'll ditto that sentiment on the Splitfires. I thought I was being smart and put a set in, and not only could I not see a performance differeance, I actually picked up valve ping. Drove me crazy for months. I even put on the MSD ignition controller and blaster TFI coil...still pinged. Went back the ole Autolite spark plugs, the ping went away and then everything came together. I realized the benefit of the MSD and coil setup, got a couple extra MPG, and now it NEVER pings...I don't care how much I lug it. I'm no engineer, but my 93 F-150 w/5.0 did not like the splitfires. For what it's worth...
REX
REX
