jonziggy Posted June 29, 2022 Report Share Posted June 29, 2022 What are the best all round spark plugs for the TR6, with electronic ignition. Champion or NGK or something else, and or what number , ie Champion N9YC etc ? Quote Link to post Share on other sites
Jonny TR6 Posted June 29, 2022 Report Share Posted June 29, 2022 (edited) Did some research a couple of days ago and bought NGK BP6ES. Got them from the Green Spark Plug co on eBay. £14 ish delivered for 6. Edited June 29, 2022 by Jonny TR6 Quote Link to post Share on other sites
FatJon Posted June 29, 2022 Report Share Posted June 29, 2022 bp6eRs if they are on an electronic ignition system. The R means resistor and that prevents interference in the electronics. If I use non resistor ones one mine it gets very upset. Quote Link to post Share on other sites
Mike C Posted June 29, 2022 Report Share Posted June 29, 2022 NGK BUR 6ET's- they're expensive but they give me far easier starting. Quote Link to post Share on other sites
andyb633 Posted June 29, 2022 Report Share Posted June 29, 2022 i find that bosch wr78 work the best for me, they never foul up even in lots of slow moving traffic Quote Link to post Share on other sites
Nigel Triumph Posted June 29, 2022 Report Share Posted June 29, 2022 5 hours ago, Mike C said: NGK BUR 6ET's- they're expensive but they give me far easier starting. +1 Multi electrode plugs, NGK BUR6ET or Bosch WR78. Better starting, smoother idle, resistant to fouling and last forever (almost). What's not to like!? Nigel Quote Link to post Share on other sites
Macleesh Posted June 29, 2022 Report Share Posted June 29, 2022 18 minutes ago, Nigel Triumph said: +1 Multi electrode plugs, NGK BUR6ET or Bosch WR78. Better starting, smoother idle, resistant to fouling and last forever (almost). What's not to like!? Nigel I went over to BUR6ETs at a recent service. Definitely smoother, scored a cheap set of 6 on Ebay being sold as NOS for a Golf VR6 Quote Link to post Share on other sites
Z320 Posted June 29, 2022 Report Share Posted June 29, 2022 Hi, I use the Bosch WR78G (short threat) with 4 electrodes on my 4 cylinder, they work without any conspicuousness. Ciao, Marco Quote Link to post Share on other sites
StuartG Posted July 1, 2022 Report Share Posted July 1, 2022 I also use the NGK BUR6ET type which have been in the car for two years now (obviously remove and clean them at service time) and they seem good. Just be aware that there are fake NGK plugs of all types out there on the internet ! (See below) So use a reputable supplier..... https://www.ngkntk.com/newsroom/blog/emea/fake-or-not/ Quote Link to post Share on other sites
astontr6 Posted July 1, 2022 Report Share Posted July 1, 2022 On 6/29/2022 at 12:52 PM, FatJon said: bp6eRs if they are on an electronic ignition system. The R means resistor and that prevents interference in the electronics. If I use non resistor ones one mine it gets very upset. The R type plugs also cut down the strength of the spark which are usually rated at 5000 ohms. Bruce. Quote Link to post Share on other sites
RobH Posted July 1, 2022 Report Share Posted July 1, 2022 On their own, resistor plugs don't make any appreciable difference to spark energy except to reduce the sharp rise-time - which is why they reduce radio-frequency noise. Problems come if you have resistive HT leads plus resistive spark plug caps plus resistive plugs as then the cumulative series resistance does start to make a difference. You really only need one of those components to be resistive, for effective noise suppression. Quote Link to post Share on other sites
FatJon Posted July 1, 2022 Report Share Posted July 1, 2022 2 minutes ago, RobH said: On their own, resistor plugs don't make any appreciable difference to spark energy except to reduce the sharp rise-time - which is why they reduce radio-frequency noise. Problems come if you have resistive HT leads plus resistive spark plug caps plus resistive plugs as then the cumulative series resistance does start to make a difference. You really only need one of those components to be resistive, for effective noise suppression. Correct, but the plug and cable resistance is negligible in comparison to the air gap. 99.99% of the energy is dissipated there in the spark. P=I^2R Quote Link to post Share on other sites
RobH Posted July 1, 2022 Report Share Posted July 1, 2022 Correct but remember P isn't energy Jon - Joules is P x time and it is energy that makes the spark hot. An instantaneous transient power peak has negligible energy. Quote Link to post Share on other sites
FatJon Posted July 1, 2022 Report Share Posted July 1, 2022 Rob, Correct, it’s been a long time since my school physics lessons. I suppose if we are getting into the depths of the physics t=RC so the resistance increases the ramp time but not the energy released and so reduces the noise. But now we’re getting a long way from TR6ology! Quote Link to post Share on other sites
RobH Posted July 1, 2022 Report Share Posted July 1, 2022 As you say Jon massive thread drift It's a bit of an esoteric subject because the whole thing is a dynamic system which can't really be described properly in simple linear terms. I guess it's best to keep it in layman's language so as not to turn folks off. Quote Link to post Share on other sites
CP26309 Posted July 1, 2022 Report Share Posted July 1, 2022 When I got my Pi version in 1972 the recommended plugs were Champion N9Y, I found these often oiled up, or got wetted with fuel after starting up, and rarely cleared themselves when the engine was up to working temperature. Which meant pulling over to hunt for the culprit! I would then wipe it dry and swop it with a hot clean one from another cylinder! Not something that these days would be acceptable when driving. Over the years I changed to NGK BP6ES, and despite many more miles on the clock the NGK's have never let me down like the Champions did when the car had hardly any miles on the clock! Quote Link to post Share on other sites
Andy Moltu Posted July 1, 2022 Report Share Posted July 1, 2022 Beware fake NGKs. A lot on the market. Quote Link to post Share on other sites
Mk2 Chopper Posted July 2, 2022 Report Share Posted July 2, 2022 I would say having tried NGK, Bosch (4 electrode) and Champion, my set up seems to prefer NGK. NGK BP6ES or BP5ES (or a combination of both) depending on how rich/ lean your set up is, and type of driving you do. So I think it's a case of trying the different types available and see how they perform in your own real world situation. Gareth Quote Link to post Share on other sites
Steve-B Posted July 18, 2022 Report Share Posted July 18, 2022 As a new owner of a TR-6 I'd like to put in new plus as part of setting a good baseline in a 48yr old car. I thanks everyone for the information, and want to make sure I don't use a dodgy vendor. Is a reliable vendor to order plugs from to not get knock offs? Quote Link to post Share on other sites
stuart Posted July 18, 2022 Report Share Posted July 18, 2022 53 minutes ago, Steve-B said: As a new owner of a TR-6 I'd like to put in new plus as part of setting a good baseline in a 48yr old car. I thanks everyone for the information, and want to make sure I don't use a dodgy vendor. Is a reliable vendor to order plugs from to not get knock offs? These are the preferred suppliers https://www.gsparkplug.com/ Stuart. Quote Link to post Share on other sites
Nigel Triumph Posted July 18, 2022 Report Share Posted July 18, 2022 20 minutes ago, stuart said: These are the preferred suppliers https://www.gsparkplug.com/ Stuart. Green Spark Plug also get my vote, I use them for classic car and bike plugs, never had a problem. Nigel Quote Link to post Share on other sites
Steve-B Posted July 18, 2022 Report Share Posted July 18, 2022 48 minutes ago, stuart said: These are the preferred suppliers https://www.gsparkplug.com/ Stuart. Many thanks Stuart, I'll give them my custom! Quote Link to post Share on other sites
Andy Moltu Posted July 18, 2022 Report Share Posted July 18, 2022 As far as I know NGK don't make a non-resistor version of the BUR6ET. These are a step up in fouling resistance compared to the BP6ES and BP6EV plugs. The resistor is more to do with radio-frequency interference supression and has not significant impact on the spark in terms of performance. Quote Link to post Share on other sites
poolboy Posted July 18, 2022 Report Share Posted July 18, 2022 I learned about those NGK triple electrode plugs and Green Spark Plug Co.from this Forum...I think about 7 years ago. I went with the #6's but I couldn't get what I considered a clean burn, so I went with the 5's...They seem to be just right...Here's a recent picture of plugs from cylinders One and Six with the ZS carbs fueling them Quote Link to post Share on other sites
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