I am going to put new plugs in when a calibrate my carb next weekend and I was wondering if anyone has a "great" plug that works well and is cost effective. I have a 289 with an Edelbrock 600cfm, performer 289 intake, mild cam, hipo exhaust manifold and pertronix ignition.

 

after going with platnum, double platnum, superduper quintuple platnum - i realized that standard copper core autolites work better than all of em. talk to a few local shops, they will tell you autolites beat out bosch, ac delco, ngk, or anyone elses plugs

i was surprised at the answer, but hey - these plugs are cheap so its a win win situation!

 

Shane is right. Original plugs are Autolite (Motorcraft) B-42, but since you have a liitle more oomph than stock you would want to use the liitle hotter plug. B-45.

 

02BlueKnight88 is my nephew ya'll. Looks like he has learned his lesson well from his old uncle. B-45's it is.

 

I run 45's.

 

autolites

 

I run B-45's too. You are wasting your money on anything more expensive unless you have a race engine, which you don't.

 

- It's whatever works for you but on other cars, specifically aVW 2180cc engines, a colder plug worked better. Keep in mind, the VW isa 133 CID 4 cylinder, air cooled, aluminum block (case), 11.0:1 compression ratio, a pair of 48 IDA Webbers. Not a normal engine.
-The plugs that I've had little sucess using on Fords have been Champion, NGK and Bosch. AC plugs worked fairly well, but I'll stick with Autolite or Motorcraft.
Jim

 

I am not sure why Champions are reltated to GM engines, but that's what I remember the bow tie factories putting in them. The aftermarket NKG or what ever may be good for certain applications, but I have found that for my application with a fairly hot Ford engine that the B-45's are just perfect. For some reason, theheat range is just right. I guess if I toned it down some, the 42's would be more in line to use.