| Author | Message | ||
| Mitchell Le (Yelcab1)
Member Username: Yelcab1 Post Number: 467 Registered: 11-2001 |
I am going to try the 5's next and see. I also found this to be useful: http://www.edelbrock.com/automotive/sparkplugs.html | ||
| Paul (Pcelenta)
Junior Member Username: Pcelenta Post Number: 219 Registered: 7-2002 |
mitch, I switched a few weeks ago from the "6" to the "5" and the car ran a ton better...checking old service records I found that the 5's had been used before...I think it really depends upon the type of driving that you do...If, like me, you get stuck in traffic every once and a while..then you may want to go with the 5's. | ||
| david handa (Davehanda)
Member Username: Davehanda Post Number: 305 Registered: 5-2001 |
I don't think it matters, at least in the early carb 308's (78 308 GTS). I ran both standard and resistor NGK's with no problem. I switched to the resistor type as I was getting a good deal of ignition noise on the AM radio and my Family Service Radio. BTW, I used both the BPR6ES and the BPR6EVX...FWIW | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3584 Registered: 2-2001 |
Philip, The orig. black plug extenders did not have resistors in them. | ||
| Mitchell Le (Yelcab1)
Member Username: Yelcab1 Post Number: 466 Registered: 11-2001 |
Ok My black Plug Extenders definitely have zero resistance. My trusty Fluke DMV tells me so. My plug wires do have resistance ranging in the 700-1000 ohms (at DC). Therefore, should I be using spark plugs with resistance built in? So, is NGK xxx5ES a good plug to use, or should I stick with xxx6ES? And no, I don't want to mess with the idle mixture anymore. They all match up and run well. | ||
| Mitch Alsup (Mitch_alsup)
Junior Member Username: Mitch_alsup Post Number: 231 Registered: 4-2002 |
For spark plugs read the Forza article. NGK uses a copper current transfer to help expand the heat range (tollerate high RPM use) of a relatively hot plug. Almost no street Ferrari needs colder plugs than the manual. This article was not kind to brand B and brand C. I believe that brand B is bosch and brand C is Champion. It was especially unkind to multiple electrode plugs. | ||
| Philip Airey (Pma1010)
Junior Member Username: Pma1010 Post Number: 52 Registered: 7-2002 |
Randy at Continental tells me the black and red extenders both have resistors so it doesn't matter if you use resistor or non-resistor plugs in the 308. They also recommend 5s and 6s. HTH | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1199 Registered: 1-2001 |
Mitchell -- the NGK BP6ES is a non-resistor plug. Here's a site showing some information about decoding the NGK PNs: http://www.kaila.net/tl125/tl125ngkcode.html The Bosch "Platinum +4" gizmo is a Platinum center electrode plug with 4-prongs -- but I'm unsure how/if it could be used in a relatively small gap (<.040") way. Bosch Platinum +4:  The "buried" center-electrode of all the Bosch Platinums also seems a little inferior to me to the exposed NGK exotic small center-electrode designs (but I've no hard data). NGK VX Platinum:  You can always have another go at the mixture screws as well, but if it's running well and you're getting a reasonable amount of miles before spark plug fouling becomes an issue I wouldn't lose too much sleep over it. | ||
| Dom Vitarella (Dom)
New member Username: Dom Post Number: 11 Registered: 11-2002 |
Hi Mitchell, This months Forza has a nice article on spark plugs. Recommends NGK, but offhand, I don't remember which NGK. Also describes what all the letters stand for, etc. From what I remember, BP6ES is not a resistor plug. Sorry I wasn't able to help much, but if you can get a hold of that forza article... Dom | ||
| Mitchell Le (Yelcab1)
Member Username: Yelcab1 Post Number: 465 Registered: 11-2001 |
I put in new NGK BP6ES (from GT Car Parts) at the rebuild time, and it is now 1000 miles later. Half the plugs are quite black so I want to change the plugs. I went to the Pepboys and ask for BP5ES, and they said they have BPR5ES (The R stands for resistor). Questions: 1. I thought the BP6ES is already a resistor plug and therefore my black plug extenders do not have resistance in them. 2. Will moving to the BPR5ES, a hotter heat range, help in reducing the black soot? 3. Someone said way back that the Bosch-4 plugs also reduced the HC left over on the fender, what plug model is that? |