Jord Posted August 8, 2013 Share Posted August 8, 2013 (edited) Sorry if it's been asked before. I've read the FAQ and done a load of searches and maybe I've missed it but I can't seem to find any definite answer to this. I'm looking at working my way up to BPU gradually but it's currently completely stock and I'm looking at getting everything in good running order. With the longer lifespan and ability to go BPU I'm looking at NGK Iridium - BKR7EIX. Basically can I fit them and would there be any downside to fitting these on a non-BPU TT? Or should I just got with NGK Iridium - BKR6EIX-11? Cheers! Edited August 8, 2013 by Jord (see edit history) Quote Link to comment Share on other sites More sharing options...
tony tt Posted August 8, 2013 Share Posted August 8, 2013 If it was me I'd be putting the colder grade plugs in fresh for bpu mate. I'd gather all the parts and get it all done because you could fit the plugs and by the time you get round to full bpu the plugs might need changed again. Quote Link to comment Share on other sites More sharing options...
Jord Posted August 8, 2013 Author Share Posted August 8, 2013 If it was me I'd be putting the colder grade plugs in fresh for bpu mate. I'd gather all the parts and get it all done because you could fit the plugs and by the time you get round to full bpu the plugs might need changed again. I was thinking that to be honest. Is there any point/difference running colder (grade 7) plugs on stock? Quote Link to comment Share on other sites More sharing options...
tony tt Posted August 8, 2013 Share Posted August 8, 2013 I don't think so mate they should work fine for stock boost levels. I could be wrong so wait till a couple more people reply before you buy anything. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 8, 2013 Share Posted August 8, 2013 No need to change plug grade if stock, also no point in fitting iridium's, the is no advantage other than extended life, and a big disadvantage in the price, just fit copper core and change every 5-6K for 1/4 of the price, more resistant to det than iridium as well. Quote Link to comment Share on other sites More sharing options...
Jord Posted August 8, 2013 Author Share Posted August 8, 2013 Cheers! Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted August 8, 2013 Share Posted August 8, 2013 I run copper core plugs in my BPU'd 1JZ to a boost pressure of 1.2 bar. Reason being if something happens and the car runs lean the plugs should be the first thing to disintegrate and should, in theory, save the cylinder & piston. Or at least that's how I read it. Quote Link to comment Share on other sites More sharing options...
Nic Posted August 8, 2013 Share Posted August 8, 2013 http://www.mkivsupra.net/vbb/showthread.php?41927-FAQ-Spark-plugs&highlight=spark Fit a set of standard copper plugs now, when you do the BPU mods then fit cooler grade plugs. I've always used Iridium plugs on my turbo cars over many many years without any problems. Quote Link to comment Share on other sites More sharing options...
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