Best Spark Plugs

[swood]

Asside from all the hype, I just wanted the bronco enthusiast opinions on the best type of plugs to run. I need to install them this weekend.

 

[ryansbronco]

Well If you have stock point then you need Bosh 4+
more point more fire. I know the next one will spin you.
If you have an MSD dont....... Yep we called MSD tech and he said that the MSD blows the high end plugs out. Somrthing about melting the cores. He said to get the cheap ones and gap them high. I think I did 58. I'll look it up.
Bones

 

[66horse]

autolites. Seriously autolites. been told by more than one mechanic to run autolites in the the bronco. I just put a used 88 5.0 in and went with Bosch plantinum. ran like shit. Put autolites in and now it purrrrrrrs.

 

[bsaunder]

NGK or autolite - nothing but problems from Bosh, especialy the +4 platnums (dang platnum core fell right out into the cylinder on three different cars)

 

[astark]

I have run both Autolite and Split Fire in my Bronco and liked them both.

 

[ASE-73]

Run conventional copper core plugs. DO NOT run platinum ... the small center electrode was designed for modern computer controlled engines (timing and fuel mixture) and does not work well with carbureted or older fuel injection systems ... they will foul and miss during acceleration and at speed.

Also, do not fall for the split-fire marketing hype. "Extra horsepower" from plugs is total BS.

 

[edge4]

Yes, I fell for the hype and ran Splitfire and I cannot tell any major difference (for twice the price) from my Autolites. What we will do for our EB's. Sometimes the plain old plug works best.

 

[JaxLax]

Anything copper. Platinum is over-rated, expensive and made for EFI (which i don't have.....yet : ).

 

[flint_knapper]

autolite

 

[Guest]

MHO

Have used a wide varity of plugs over the years. Would agree with using the factory recommended heat range, Autolite plug. Further agree that there is a lot of hype in plug marketing.
Exception being, if your experiencing oil fouling may wish to go a little hotter.
One of the tricks I use to run 12.5:1 compression with my 351C is to go way fat on the secondary jetting. When the secondaries come on under load the rich mixture better adsorbs heat. Does require a slighty hotter plug to resist fouling.
Did install Bosh +4 plugs in my '98, 4.6, F-150 40,000 miles ago. The logic had nothing to do with power. Changing plugs in this application is a 3-hour proposition. Believe the additional electrode area would prolong service life.
Any chance the Bosh plug failures were the result of detonation?

 

[76BroncoSport]

I have been told many a time it's better to run cheaper plugs and just replace them regularly. The fact that you have a high dollar spark plug in there makes some people think you can run it longer without failure/decline in performance. Don't waste your money, buy anything copper and replace at the suggested or whenever you think you want/need to...replacing plugs ain't no thing

 

[Rustytruck]

Autolite prefered. Motorcraft have left me with center electrode pull out on 4 plugs once. lost 2 splitfires and found platinium plugs dont run right in my Bronco but the work well in my Toyota. Champions are for fishing weights due to quality control. I prefer non resistor to resistor plugs but are getting harder to find. I find plugs are a lot less of a problem with the electronic ignition but the plug wires take more of a beating so if it is missing make sure you check the wires.

 

[swood]

Sounds like autolites is the way to go.

I'm running a ford 302
Edelbrock performer package (cam, lifters, intake, etc)
BC Quadrajet
MSD "ready to run" distributor

Any additional comments for plugs on this setup are appreciated.

Thanks Everybody!!!

 

[markcberry]

Just a quick little story along these lines. A friend of mine told me this story about his father who was a sales rep for Borg Warner for central and south Texas in the early 70's. While at a trade show, one night after closeing, someone broke in and stole all of the cool new gadgets from all of the boothes except the Champion display. They didn't touch any of it.

 

[SteveL]

I was running autolites and like them. I put splitfires in my 72 with a tired 351w. They made a pretty big difference with it. I tried em in our 66 with a newer motor and they weren't as noticable. I run a DUI on both.

 

[Skuzzlebutt]

If you need new plugs, any brand you put in will yield a big improvement. For a comparison you need to replace new plugs with new plugs.