Careless Posted December 7, 2006 Share Posted December 7, 2006 Hi, I just got my z running, as some of you may know, so I'm looking to change the 25 year old plugs. They don't look fouled at all, but I'm just curious to see if it would help my low idle at all. I bought Champion Copper Plus RN12MC4 plugs, then noticed that alot of people go with the NGK BPR6ES-11, and I was wondering if anyone has a current setup like mine that has tried a couple of different sets. I have a BONE STOCK L28E in my 1976 280z. No turbo, No mods, nothing. I ask this question because I've searched for about 40 minutes now, on google as well, and all I find is turbo/l28et gap settings. Can someone shed some light on a plug/gap combo for a STOCK motor that has yielded better idle/acceleration than what is listed in the FSM or other Datsun documentation? Im not sure if I should go with the BPR6ES, BPR7ES because of the heat range. But it is a stock car with all the devices and electronic/mechanical components working fine. The only problem I have is a lumpy idle, due to a semi-faulty alternator that will most likely be replaced with the GM Delco-Remy unit. (refer to my other thread to comment on that, please) EDIT: The engine also only has 47000 km on it, and I've been looking to swap an RB25 (later to be changed to RB30), so I want to get my L28 running smoothly, and then out of the car, so I can sell it and get the money to put aside for chassis work. I've come to the conclusion of getting the engine, and doing the wiring so that it starts up, then pulling the wiring and doing some cleanup, and building the chassis around the engine in the front section, and beefing up the rear section of the car. I believe for me, that this is the best route. So getting this engine running well could benefit myself, as well as anyone who is interested in an L engine with only 50,000 k on it. For a 76, I think that's sorta scarce Thanks Z'ers Raffaele Quote Link to comment Share on other sites More sharing options...
z-ya Posted December 7, 2006 Share Posted December 7, 2006 If it is a stock setup, always use the OEM plug. Always use NGK in L6 motors. Use the NGK BPR6ES and gap them between 40 and 45 thousands. Quote Link to comment Share on other sites More sharing options...
mom'sZ Posted December 7, 2006 Share Posted December 7, 2006 I'm going to agree with Pete... use the NGKs, don't use the champions. Quote Link to comment Share on other sites More sharing options...
nismopick Posted December 7, 2006 Share Posted December 7, 2006 NGK's only brah! Quote Link to comment Share on other sites More sharing options...
JSM Posted December 8, 2006 Share Posted December 8, 2006 .0044 Quote Link to comment Share on other sites More sharing options...
Careless Posted December 9, 2006 Author Share Posted December 9, 2006 thanks everyone. now this thread will have a place on the forums for people who were just looking for factory/general information regarding the plugs/gap, and not any "mod friendly" info =) good stuffs! Quote Link to comment Share on other sites More sharing options...
johnc Posted December 10, 2006 Share Posted December 10, 2006 Champion projector tips give you .1 more compression. Also, indexing the plugs helps a little. Quote Link to comment Share on other sites More sharing options...
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