Richard Crawley Posted February 26, 2022 Author Report Share Posted February 26, 2022 Decided to stick with standard NGK plugs in the end as cylinders 1-4 never seem to have a problem so have ordered 4 x BP6ES & 2 x BP5ES for cylinders 5 & 6. Thanks to all for your input. Quote Link to post Share on other sites
ntc Posted February 26, 2022 Report Share Posted February 26, 2022 1 hour ago, Richard Crawley said: Decided to stick with standard NGK plugs in the end as cylinders 1-4 never seem to have a problem so have ordered 4 x BP6ES & 2 x BP5ES for cylinders 5 & 6. Thanks to all for your input. One presumes you have cleaned the plenum chamber inside? Quote Link to post Share on other sites
Z320 Posted February 26, 2022 Report Share Posted February 26, 2022 (edited) The gap on all of my Bosch WR78G is about 0.8 mm and it is not designed to adjust, and it is OK this way Edited February 26, 2022 by Z320 Quote Link to post Share on other sites
Richard Crawley Posted February 27, 2022 Author Report Share Posted February 27, 2022 17 hours ago, ntc said: One presumes you have cleaned the plenum chamber inside? Not sure what that would do as it's the clean air side of the throttle bodies so just clean & filtered air comming through there! I do keep the air filter in good order though. Quote Link to post Share on other sites
Richard Crawley Posted February 27, 2022 Author Report Share Posted February 27, 2022 On 2/24/2022 at 4:54 PM, stuart said: Welcome back Richard. They would be fine for your car. Stuart. Thank's Stuart. Quote Link to post Share on other sites
ntc Posted February 27, 2022 Report Share Posted February 27, 2022 2 hours ago, Richard Crawley said: Not sure what that would do as it's the clean air side of the throttle bodies so just clean & filtered air comming through there! I do keep the air filter in good order though. It’s fact by design that oil mist and condensed vapour collect at the low point you don’t have this problem with Weber’s or SUs Quote Link to post Share on other sites
rogerguzzi Posted February 27, 2022 Report Share Posted February 27, 2022 18 hours ago, Z320 said: The gap on all of my Bosch WR78G is about 0.8 mm and it is not designed to adjust, and it is OK this way Hello Marco They are probably ok on standard coil system at 0.030" to 0.035" but the 1.1mm (0.040" to 0.044") would probably miss fire. I run a VW Bosch type coil pack which gives higher voltage as all moderns do Roger Quote Link to post Share on other sites
Martin50 Posted February 27, 2022 Report Share Posted February 27, 2022 Neil, Richard, Just to help my understanding:- the oil mist and condensed vapours come from the rocker cover connection to the plenum chamber?. I have got the arrestor set up so it drains back as much as it can to the rocker but even with that I can see there will be vapours / mist that will carry into the air plenum. I did last year clean up / set up the throttle and air systems. The air plenum was dirty inside and gave it good clean but probably first time its been cleaned in 20 + years so not too bad I thought. I also change air filter pretty regularly as I do get dust although it is mainly on one side of filter. But hadn’t linked carry over from rocker cover with plug condition - useful to know. Quote Link to post Share on other sites
ntc Posted February 27, 2022 Report Share Posted February 27, 2022 Martin Your understanding is correct however the cars are not used as they use to be add to that the rear of the engine does not run hot lack of use and short journeys will magnify the the problem Quote Link to post Share on other sites
Richard Crawley Posted February 27, 2022 Author Report Share Posted February 27, 2022 2 hours ago, ntc said: It’s fact by design that oil mist and condensed vapour collect at the low point you don’t have this problem with Weber’s or SUs I understand the rocker cover breather is attached but there is an in-line arrestor & in all the years I've had the car, I've never had problems with emulsification inside the plenum. Thre plenum was fine inside when cleaned, refurbished & rebuilt @ 82k miles & the car still hasn't reached 90k miles since but that's another story! Quote Link to post Share on other sites
Richard Crawley Posted March 9, 2022 Author Report Share Posted March 9, 2022 Following on from my original post; I have a "Lumenition" electronic ignition system fitted with a Lucas Sports coil, what do you guys recommend for plug gaps & should I set the gap on the 2 x BP5ES plugs the same as the BP6ES? Quote Link to post Share on other sites
SpitFireSIX Posted March 10, 2022 Report Share Posted March 10, 2022 I personally would not recommend a hotter plug in #5 & #6. Fix the problem? If i had a "Lumenition" system, I would buy the lowest Ohmic coil it could drive. If it can only drive a "Lucas Sports coil", then not much more energy than OEM. Quote Link to post Share on other sites
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