Its time now that i change my plugs on my 87 T/A ...305 TPI..what is everyone using as plugs..as thinking about wires, cap and rotor..please help..
thanks
AJ

 

just dont buy splitfire plugs....i cant stand to see someone throw away money on them. yes they'll outlast a stock plug, but dont believe the whole two arc thing....

 

Exactly. Platinum ones will last longer, but copper conducts better. AC Delco seem to be the popular ones.

 

Also dont get fooled for the multi-electrode plugs like the +4 and i think they make a +2 or something now. Absolutely no performance advantage and as the plugs wear pieces of the ceramic actually break off because of the 4 grooves worn in the insulator by the sparks. Ukraine Train can give a better description of why the +4s suck and maybe also some reccomendations, he works for autolite.

 

And personally, I use delco plugs. I dont see any need for platnium because In fooling with my car I always end up doing something that fouls them before they need changing anyway.

 

What's this about the Bosch +4s'? 2 of my friends have them in their vehicles and are quite satisfied with them. I bought them about a month ago but haven't installed them yet. I paid around $48 for two 4-packs. Should I keep them or take them back?

thanks

 

Well basicaly heres my understanding of the problem taht I got from Ukraine Train who works at autolite sparkplug in the test lab. Oh never mind he's gonna come on and post.

 

i'm co-oping for honeywell, makers of splitfire, autolite and motorcraft. we do comptetitor tests, of course, and i saw a report that was done on the +4s. a spark always travels the path of least resistance and so on the +4s, it will start by jumping to the nearest ground electrode to the center electrode and after a while, that ground electrode wears down and the spark begins to jump to another electrode because it's now closer than the first, and so on til it goes to all four electrodes. so you only get one spark at a time anyway, despite four ground electrodes. while all this is happening, the center electrode is wearing also and begins to recede into the ceramic which makes the spark carve a trench through the ceramic to get to the ground electrode. so after the spark makes a couple trenchs, that piece of the ceramic breaks off inside your engine. ceramic is very very hard so you can imagine what it can do in your cylinders.

i'm on my college rotation now so i cant get pics of the report but i'll see if someone can email them to me, unless they're proprietary.

splitfires are just a gimic. i have heard, though, that people using them on two stroke engines love them.

the best plugs to use are a finewire double platinum.