Harvey Posted January 28, 2003 Share Posted January 28, 2003 Looking for advice on which "NGK" plug for a x flow in a moderate state of tune. TIA Link to comment Share on other sites More sharing options...
eric Posted January 28, 2003 Share Posted January 28, 2003 BP7ES are the good one for a sprint engine eric Link to comment Share on other sites More sharing options...
Anthony Posted January 28, 2003 Share Posted January 28, 2003 B8ECS fitted to all steel cross flow Link to comment Share on other sites More sharing options...
Jan Wulfsberg Posted January 28, 2003 Share Posted January 28, 2003 Bosch WR91 (Super4) does a much better job in my 158 bhp X-flow than NGK B8ECS (no track driving) Wulf (Viking) Link to comment Share on other sites More sharing options...
puremalt Posted January 28, 2003 Share Posted January 28, 2003 Wish you told me that before I bought new NGK s recently.. When is it Summer? Link to comment Share on other sites More sharing options...
Graham Perry Posted January 28, 2003 Share Posted January 28, 2003 Something that surpises me, is that of all the topics we debate or argue about on here , I cannot remember spark plugs ever proving contentious, and indeed the subject rarely comes up. The only thing that annoys me about them is that they are often expensive, even at trade prices. Agree on the NGK choices for moderate tune and all steel BTW Link to comment Share on other sites More sharing options...
Michael Peterson Posted January 28, 2003 Share Posted January 28, 2003 What do you consider expensive Graham? Link to comment Share on other sites More sharing options...
edmandsd Posted January 28, 2003 Share Posted January 28, 2003 I always swore by the extended nose platinum tipped Escort Cossy plugs. Home of BDR700 Link to comment Share on other sites More sharing options...
Graham Sewell Posted January 29, 2003 Share Posted January 29, 2003 I found that the B8ECS fouled quite badly in a SuperSprint engine if used on the road and in traffic. I tend to use BP7ES's as per the Sprint engine with fewer problems. Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
Harvey Posted January 29, 2003 Author Share Posted January 29, 2003 Thanks to all who have replied. Link to comment Share on other sites More sharing options...
Klaus Loske Posted January 29, 2003 Share Posted January 29, 2003 Hi, I was running BP7ES in my 145hp X-flow. The problem was that the plugs were constantly fouling due to the rich mixture at low rpm. Since one year I am trying the Platinum version of the NGK plugs. So far, they work really good. Very little fouling of the plugs and they have excellent self cleaning capabilities. They are much more expensive (about 4x) but I hate to clean the plugs every week and therefore it is acceptable. Don´t have the ident code at hand but can look it up if anybody is interested. Klaus 1700+ X-flow Combustion is not a secret Link to comment Share on other sites More sharing options...
Graham Sewell Posted January 29, 2003 Share Posted January 29, 2003 Klaus - yes please, I am due for a service in a month or so, and would like to try something different Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
eric Posted January 31, 2003 Share Posted January 31, 2003 BP7EVX are platinium ones However they foul more at idle speed than BP7ES But they are very good, I have kept them 6 months on my sprint Caterham. They are now on my Golf GTI mk1 I prefer BP 7 ES for the Caterham I have also tested Champion N6YCC , CC = cooper core for competition and the engine is less smooth than with BP7ES eric Link to comment Share on other sites More sharing options...
Klaus Loske Posted January 31, 2003 Share Posted January 31, 2003 Hi, Eric was quicker than me to look up the number... With respect to fouling, I have the opposite experience. With BP7ES, I had a lot of trouble driving at heavy traffic (e.g. city, slow, low revs). They were heavily fouling an I constantly had to clean them, sometimes 3-4 times a week... With the Platinum ones, I have no problem so far, I have never taken them out since I put them in and no sign of misfire. Klaus 1700+ X-flow Combustion is not a secret Link to comment Share on other sites More sharing options...
Harvey Posted January 31, 2003 Author Share Posted January 31, 2003 Klaus/Eric, How much more expensive were the Platinum ones? Link to comment Share on other sites More sharing options...
Graham Sewell Posted January 31, 2003 Share Posted January 31, 2003 According to Burton's web site, the Platinum ones are £6 each where the standard ones are £2 each (excluding VAT and P&P). No doubt Halfords can reduce the cost of a pack of 4 standard ones even further. However, looking the other way, it is only an additional £16 to get the benefits of reduced fouling (depending on who you believe). Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
Joe 90 Posted February 1, 2003 Share Posted February 1, 2003 One of the nice things about NGK plugs is that the numbering scheme makes sense. BP represents the basic thread and seat and the next number is the temperature. The higher the number, the colder the plug. If the plugs are fouling, you can try a warmer, lower number plug. As you might expect, a steel XFlow will probably be highly tuned and need a colder, higher number plug. 99,000 miles so far Link to comment Share on other sites More sharing options...
andy couchman Posted February 2, 2003 Share Posted February 2, 2003 I asked the 'which plug?' question of the NGK people at the Autosport show and they have a CD-ROM which tells them the answer. For my engine (Kent 244 cam; twin 40s) they recommended B8ECS plugs. The key is apparently to look at the plug colour to see whether your plugs are too hot or cold. Perhaps one of our techies could explain what to look for - I can't quite remember it! Seem to think there's something on this in the Dave Walker book on engine management too. Andy Couchman 1988 1700 crossflow Link to comment Share on other sites More sharing options...
Graham Sewell Posted February 3, 2003 Share Posted February 3, 2003 When I had my 1700 xflow rolling roaded by Dave Walker, we popped the plugs after a few full power runs to check on colour. Based on the following caveats: 1. we were using unleaded fuel as I wanted a failsafe setup 2. I had BP7ES plugs We got a nice even matt grey finish which showed that the plugs were about right. However, this sort of testing is the only one valid for tuning by plug colour. It says nothing about how the plugs will foul when caugght in traffic/idling. Therefore, as the 7's are not too hot and they are better at self-cleaning that the 8's I would not move to a colder plug (I have even tried the 6's and with my driving style I noticed very little diffrence). Obviously for track days where the engine is a full throttle for much longer periods of time, the cooler 8's may be beneficial. Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
jlhinte Posted March 25, 2022 Share Posted March 25, 2022 Klaus, I have a '93 Super Sprint probably in the 138ho range. The NGK B8ECS are now hard to find in the US.I heard a suggestion to replace with NGK Iridium IX Spark Plugs : BR8EIX. Is the plug you were thinking of? Thanks, JL Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted March 25, 2022 Share Posted March 25, 2022 I would think a BR7ES plug would be a better plug for a fairly low output engine (i.e, less than 100bhp per litre), unless you are only running flat out on the track in high ambient temperatures. An '8' heat range makes the engine more difficult to start, more prone to fouling and less able to provide a steady idle than a '7' heat range, so less suitable for general purpose road and track use. You can get the BR7ES plugs from pretty well any auto parts outlet. Link to comment Share on other sites More sharing options...
OldAndrewE Posted March 25, 2022 Share Posted March 25, 2022 Plugs with an R in the designation have built in resistance. Those without don't. I assume this will make a difference if it is only the plugs that are changed.I ran BP7ES in my X-flow when it was last running and will do so again when it is back on the road Link to comment Share on other sites More sharing options...
Jonathan Kay Posted March 25, 2022 Share Posted March 25, 2022 Where are you, please?There's a fair bit of discussion in the archives:https://duckduckgo.com/?q=site:caterhamlotus7.club+B8ECS(link is external)Alternatives seem to depend on whether yours is running hot or cold. See aerobod's comments above.JonathanPS:The B8CS is available from SparkPlugs.co.uk:https://www.sparkplugs.co.uk/catalogsearch/result/?q=B8ECS(link is external) Link to comment Share on other sites More sharing options...
Jonathan Kay Posted March 25, 2022 Share Posted March 25, 2022 Klaus' last post in this thread was in 2003...Jonathan Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted March 25, 2022 Share Posted March 25, 2022 Re #22. Andrew, if you are running points and no ECU, then non-resistor plugs would be advisable, in JL's car with it being a 1993 model, if electronic ignition and especially if running an ECU, then resistor plugs are advisable, although appropriate resistor wires may alleviate the need for resistor plugs. Link to comment Share on other sites More sharing options...
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