260ZRED Posted January 17, 2003 Share Posted January 17, 2003 ok guys, i took my spark plugs and used some sandpaper to get the crud off of them, car runs better now, but i was wondering: who has had good luck with what spark plugs in their L motors? any outstanding, good brands i should try to get? Quote Link to comment Share on other sites More sharing options...
Synlubes Posted January 17, 2003 Share Posted January 17, 2003 NGK Would need info on your setup to recommend a particular NGK plug. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted January 17, 2003 Share Posted January 17, 2003 I read a sprkplug test awhile back and NGK came in second over all. Only plugs that was better was Champion plugs. Quote Link to comment Share on other sites More sharing options...
Synlubes Posted January 17, 2003 Share Posted January 17, 2003 Sorry,(edit) NGK for the Nissan/Datsun. IMO I`ve never replaced a "bad" NGK plug in over 22 years of use. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted January 17, 2003 Share Posted January 17, 2003 Yap, I'm all about NGK plugs. And have had good result with them. BTW, do you get (more like can I) discount on Amsoil stuff Doug? I'll be intested if you can get me a discount. I would like to try the 10w-30 synthetic in my turbo engine. I also like to know the part # for an oil filter to go with that synthetic oil. Something equevilant of Motorcraft FL1 Quote Link to comment Share on other sites More sharing options...
Mudge Posted January 17, 2003 Share Posted January 17, 2003 Actually, your not supposed to use sandpaper on plugs because it can leave deposits behind, just use a file... Quote Link to comment Share on other sites More sharing options...
Synlubes Posted January 17, 2003 Share Posted January 17, 2003 Send me your e-mail address. Quote Link to comment Share on other sites More sharing options...
Cruez Posted January 17, 2003 Share Posted January 17, 2003 NGK for sure... After building my engine it ate a set of Bosch Platinum and a set of Bosch supers... both within 15 minutes... Put in a set of cold range NGK's and put 1000s of miles on them.... Quote Link to comment Share on other sites More sharing options...
johnc Posted January 17, 2003 Share Posted January 17, 2003 Here's an old BSP/IT racer trick: Use a projector tip spark plug and index it using the Moroso washer kit part # 71910. I ran Champion 412 RC12LYC plugs and they gave my shaved N42 head, dished piston combustion chambers a .1 compression ratio increase. Quote Link to comment Share on other sites More sharing options...
jeffp Posted January 17, 2003 Share Posted January 17, 2003 The newer NGK platinum plug from Nissan works very well in my turbo application bcpr6es-11 (bcpr6vx-11 for the platinum plug). I was thinking of going with a size colder on the plugs to see what that will do for my boost on pump gas. I just may be able to squeeze some more boost out of the engine with acolder plug. Quote Link to comment Share on other sites More sharing options...
260ZRED Posted January 17, 2003 Author Share Posted January 17, 2003 johnc: what do you mean when you say "index it using the Moroso washer kit part # 71910"? what do u mean by 'indexing'?? how would that raise the compression ratio? (safely?) thx for the tips. Quote Link to comment Share on other sites More sharing options...
260ZRED Posted January 17, 2003 Author Share Posted January 17, 2003 learn something new everyday... found this interesting article that explains exactly what indexing is... indexing spark plugs has anybody done this on their Ls? notice a difference? Quote Link to comment Share on other sites More sharing options...
David K Posted January 17, 2003 Share Posted January 17, 2003 NGK ack! I have used NGK 2 times. The first time, 2 plugs broke and ended up in the cylinder and i had to change the head gasket to get the peices out. The second time, the spark was jumping from the boot to the outside of the block because the little tip would vibrate loose on the threads and the spark wire would always wiggle off. Ive started using Denso, and they are the best for me so far! They sell them in most parts stores. Quote Link to comment Share on other sites More sharing options...
Guest HIGHRPM Posted January 17, 2003 Share Posted January 17, 2003 Everyone recommends what has worked for them and dishes the rest. After 31 years of racing, everything from motocross to stockcar to drag racing. I've tried all the brands, under similar conditions, and I have to say without a doubt that NGK was the BEST, and believe it or not, Autolite came in second best. This was based solely on performance and consistantcy based on heat ranges and by plug breakdown under load. Champion, AC, Bosch, Prestolite and even Slpitfire, tended to show Uneven heat ranges and premature breakdown.I found that with the last mentioned plugs, we were changing plugs quit often because of reliability, but with NGK and then Auotlite plugs, we changed them mainly for the sake of having something Fresh installed, also because they were sponcered and we had to make sure we used our complete inventory in the season, which gave us a fresh inventory for the next race seasn. All the plugs out there are very good, some just give more confidence than others. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted January 18, 2003 Share Posted January 18, 2003 I have read articles saying plugs are made out of different materials. I remember them saying Autolites use harder material and thus live longer. Champions are softer and lose metal quicker. But some people feel plugs ignite the mixture when small bits of the plug electrode vaporize. They theorized plugs are a lot like tires. Use a softer plug for better performance but shorter life. But I did try Bosch Platniums in my stock 240 and the engine did not like them. Have run NGK's ever since. Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted January 18, 2003 Share Posted January 18, 2003 Well i didn't particularly like the two sets of NGK plugs,not saying they were bad, just didn't like them. I use bosch P-4's now, before that i tried some Splitfires-hated em'... but they sparked no matter how dirty they were. But doesn't it make sense to use a bosch plug on a bosch fuel injection system? just my thought. But then again just about every sensor i've replaced i've replaced it with Bosch. german technology on a jap car. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted January 18, 2003 Share Posted January 18, 2003 Originally posted by Nismo280zEd:Well i didn't particularly like the two sets of NGK plugs,not saying they were bad, just didn't like them. I use bosch P-4's now, before that i tried some Splitfires-hated em'... but they sparked no matter how dirty they were. But doesn't it make sense to use a bosch plug on a bosch fuel injection system? just my thought. But then again just about every sensor i've replaced i've replaced it with Bosch. german technology on a jap car. No, bosch plugs on bosch EFI doesn't really matters. What matters it how low resistant the plugs are and how long the spark can ark. IMO Quote Link to comment Share on other sites More sharing options...
johnc Posted January 18, 2003 Share Posted January 18, 2003 > has anybody done this on their Ls? > notice a difference? I do and yes, there is a difference that is noticeable on an engine dyno - assuming the rest of the engine is in perfect condition. Quote Link to comment Share on other sites More sharing options...
Synlubes Posted January 18, 2003 Share Posted January 18, 2003 I`ve been using the regular NGK plugs, Anyone have any insite on the NGK platinum plugs?(for performance use) Quote Link to comment Share on other sites More sharing options...
WHP Posted January 19, 2003 Share Posted January 19, 2003 I too have to endorse the NGK. However, the first 240Z I purchased used in 1975 had a set of ESSO or EXXON plugs that were much superior to anything else I have ever used. I would put in new Champions, AC, etc... only to end up sandblasting the ESSO plugs and putting them back in. They were better worn out than anything else new. Anyone know who was the manufacturer of these? Quote Link to comment Share on other sites More sharing options...
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