fruity_south Posted November 6, 2008 Share Posted November 6, 2008 quick question, i want to change my plugs what should i use when im running a nos system, something in the back of my head says cooler plugs. and where should i be looking at getting them from? Quote Link to comment Share on other sites More sharing options...
Terminator Posted November 8, 2008 Share Posted November 8, 2008 Definitely a colder plug, you also should consider non projecting electrode plug as they will not heat up too fast and should not lead to runaway det. Quote Link to comment Share on other sites More sharing options...
fruity_south Posted November 16, 2008 Share Posted November 16, 2008 any links to where i can get some? Quote Link to comment Share on other sites More sharing options...
Guest ridox Posted February 9, 2009 Share Posted February 9, 2009 Awesome thread thanks Alex. I went with the NGK - BKR7E (6097) - gap 0.7mm. Runs great! Quote Link to comment Share on other sites More sharing options...
dan4 Posted March 8, 2009 Share Posted March 8, 2009 BCR8ES are the same design as the bkr*e plugs with the exception of the "S" standing for super copper core electrode heres some reference to NGK plug codes... http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm Quote Link to comment Share on other sites More sharing options...
heather1mee Posted March 13, 2009 Share Posted March 13, 2009 (edited) why oh why, did they put the inlet maifold on top of the spark plugs in the na... ha!!! is this the same on the TT.? heres me thinking it was a tiny job. sorry i know its kinda off topic ! Edited March 13, 2009 by heather1mee (see edit history) Quote Link to comment Share on other sites More sharing options...
dan4 Posted March 18, 2009 Share Posted March 18, 2009 nope just NA, FAIL Quote Link to comment Share on other sites More sharing options...
heather1mee Posted March 19, 2009 Share Posted March 19, 2009 :pwouldnt ya know!!! Quote Link to comment Share on other sites More sharing options...
black_widow87 Posted May 30, 2009 Share Posted May 30, 2009 Hi there, thinking of changing my spark plugs but not quite sure which ones would best suite my car. I have a 93 tt with a HKS super drager, Hks front pipe and blitz sonic induction kit....what would u recommend? Cheers Quote Link to comment Share on other sites More sharing options...
dan4 Posted May 30, 2009 Share Posted May 30, 2009 NGK BKR7E change them every 5-7k or every year Quote Link to comment Share on other sites More sharing options...
black_widow87 Posted May 31, 2009 Share Posted May 31, 2009 Thanks for the advice. However im struggling to find a site on the internet which sells them! Any suggestions on where to get them from? Quote Link to comment Share on other sites More sharing options...
guye_d Posted September 8, 2009 Share Posted September 8, 2009 What to use when MAPPING? A. Use only copper plugs when mapping. Iridium plugs should be saved for an engine that is already mapped and tested on coppers. This is because the mapping process is fraught with danger and that danger is det. Detonation will ruin a copper plug, but the engine will be kept safe. An iridium plug is much more immune to det and other parts of the engine can suffer long before the plugs do. Stay safe and use copper plugs when mapping! Cont. -Alex Would it then just make sense to use copper all the time and change frequently? Quote Link to comment Share on other sites More sharing options...
dan4 Posted September 8, 2009 Share Posted September 8, 2009 yup Quote Link to comment Share on other sites More sharing options...
spartan Posted January 2, 2010 Share Posted January 2, 2010 (edited) Great info. that I don't want to detract from in any way (just come here from another thread) so I hope my input isn't confusing. I can't see the following mentioned anywhere before in this thread. I believe for a August 1997 onwards TT (I guess this means VVTi), the OEM spark plug has changed slightly: NGK BKR6EKPB-11 DENSO PK20TR11 The new plug is a 'multi-ground' (not multi-spark) design and seems very expensive (see NGK website for more details). Interestingly, the Iridium equivalent plug hasn't changed which leads me to think that the original style OEM plug would still work quite happily. I wonder why they decided to go for a different design for OEM - somehow related to VVTi engine changes? Edited January 2, 2010 by spartan Bit clearer maybe (see edit history) Quote Link to comment Share on other sites More sharing options...
tDR Posted January 3, 2010 Share Posted January 3, 2010 Multi ground = multi spark, the spark jumps from the central electrode to the ground electrode(s). http://www.sparkplugs.com/services/image.asp?path=http://www.sparkplugs.com/productImages/1/NGK4302-2.jpg&width=130&height=200 Doubt it really makes any difference (or we'd all be fitting Bosch Super-4's!) and in a modified application I'd say they're more dangerous given there's more ground electrode to break off. Iridiums would be of a multi ground electrode design if there was a benefit to be had IMO. The original style OEM plug will still fit given they're all the same fitment for the head design, so everything in this guide still holds true. Quote Link to comment Share on other sites More sharing options...
spartan Posted January 5, 2010 Share Posted January 5, 2010 (edited) Found this extra info. on multi-ground spark plugs: This is an attempt by manufacturers to increase the service life of the spark plug. The ground electrodes can wear down rapidly in some engines. Tiny particles of metal are removed from the ground electrode each time the plug fires hence they gradually wear away. There is a misconception that a multi ground plug will produce mutiple sparks - this is not true, only the nearest electrode to the centre (i.e. currenty the longest) will spark, as that becomes worn, another electrode will become the longest and replace it as the sparking electrode. So not really multi-spark (no simultaneous spark). There is also some debate as to whether the extra metal within the combustion chamber helps channel heat away/retains it, thus preventing/causing det. etc. Maybe the Toyota service interval was extended for VVTi engined cars, hence the requirement for a plug that lasted even longer? Anyway, "as you were" is the message to take forward (I'll get me coat). Edited January 5, 2010 by spartan Grammar (see edit history) Quote Link to comment Share on other sites More sharing options...
Alex Posted January 5, 2010 Author Share Posted January 5, 2010 Are you actually talking about the switch to wasted spark ignition? Where the igniter fires the spark twice per 720deg of crank rotation? Quote Link to comment Share on other sites More sharing options...
spartan Posted January 5, 2010 Share Posted January 5, 2010 (edited) I wasn't but I think you've just hit upon the reason for the change - as wasted spark ignition was introduced with the VVTi engine - each plug is igniting twice as often as before (eroding quicker) hence the need for a plug which will last longer! Does that make sense? Does it mean that owners of VVTi engined cars who aren't using this new style of plug should potentially be changing them more often? I guess not if you're already using Iridium ... Edited January 5, 2010 by spartan Iridium (see edit history) Quote Link to comment Share on other sites More sharing options...
tDR Posted January 5, 2010 Share Posted January 5, 2010 Sounds feasible to me. No idea why you'd wanna fit platinums over iridium though, given the iridiums have the longer rated service life + other benefits. Quote Link to comment Share on other sites More sharing options...
spartan Posted January 5, 2010 Share Posted January 5, 2010 No idea why you'd wanna fit platinums over iridium though, given the iridiums have the longer rated service life + other benefits. Mr Toyota you mean? Perhaps the Iridium plugs weren't available back in 1997. If they were, it does seem a bit strange as the cost of the multi-ground platinum (now) exceeds the iridium equivalent plug. Quote Link to comment Share on other sites More sharing options...
tDR Posted January 5, 2010 Share Posted January 5, 2010 Iridiums have only been generally available since circa 2003 IIRC so I can see why Toyota went that way - just meant in general now. Quote Link to comment Share on other sites More sharing options...
kill1308 Posted April 8, 2010 Share Posted April 8, 2010 After reading this to get an idea of what plugs I should use, is there a recommended torque setting to install the sparkplugs to? I always like to make sure things are torqued up correctly (I'm probably a bit too anal about this sort of thing hehe). Quote Link to comment Share on other sites More sharing options...
Brazil Posted May 25, 2010 Share Posted May 25, 2010 After reading this to get an idea of what plugs I should use, is there a recommended torque setting to install the sparkplugs to? I always like to make sure things are torqued up correctly (I'm probably a bit too anal about this sort of thing hehe). I would be interested in this too, but as there is no mention on this thread I dont think there would be...? could be wrong..! I got a bit confused with this VVTI multi spark plug, do I need different ones for my BPU '400bhp' VVTI it runs mainly on 1 bar but once in a blue moon i like it to bump it up to 1.2bar...? Should I go for either, NGK - BKR7E (6097) - gap 0.7mm NGK Iridium - BKR7EIX - leave gap alone Thanks in advance... Quote Link to comment Share on other sites More sharing options...
supra steveo Posted June 27, 2010 Share Posted June 27, 2010 just changed my plugs and now my engine is hunting for power any reason for this ? what can i do ? i am getting sick of this car now Quote Link to comment Share on other sites More sharing options...
Terminator Posted July 4, 2010 Share Posted July 4, 2010 Just found this http://www.driftworks.com/forum/fc-tuning/101095-steves-spark-plug-information-guide.html and the guy is claiming credit, his post is only 4 years after Alex posted the original in 2005. It is just a cut and paste from here. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.