cliff.b Posted January 29, 2023 Report Share Posted January 29, 2023 Will be giving the Spitty a service shortly and thought I might replace the plugs. Some time ago I read recommendations for Bosch W78 but then read they are now hard to find. So just wondered, can you still get then, if so where, and if not, are there any other recommendations? Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 29, 2023 Report Share Posted January 29, 2023 this came about because many makes stopped glazing the ceramic isolator and they dont clean up well with carb fueling the general was ngk 5-6 bpes but they can noe suffer W78 seem discontinued the main snag is poor running on choke coats the ceramics with carbon ?? and the plug breas dwn early life so get the fast idle set quite high and get it up to temp by brisk driving not tootling round on choke and most plugs of the correct range will work i have never had a problem with the base NGK and my view is never use a plug with an R in the suffix our HT is not enough to work them at best Pete Link to comment Share on other sites More sharing options...
cliff.b Posted January 29, 2023 Author Report Share Posted January 29, 2023 30 minutes ago, Pete Lewis said: this came about because many makes stopped glazing the ceramic isolator and they dont clean up well with carb fueling the general was ngk 5-6 bpes but they can noe suffer W78 seem discontinued the main snag is poor running on choke coats the ceramics with carbon ?? and the plug breas dwn early life so get the fast idle set quite high and get it up to temp by brisk driving not tootling round on choke and most plugs of the correct range will work i have never had a problem with the base NGK and my view is never use a plug with an R in the suffix our HT is not enough to work them at best Pete I haven't had any problems with the existing plugs, just thought it might be time to change them and seem to remember some claiming the Bosch plugs performed better than the traditional type. Not even sure I need to replace the old ones yet. How long do they usually last in our cars if all set up ok? Link to comment Share on other sites More sharing options...
Clive Posted January 29, 2023 Report Share Posted January 29, 2023 5 minutes ago, cliff.b said: I haven't had any problems with the existing plugs, just thought it might be time to change them and seem to remember some claiming the Bosch plugs performed better than the traditional type. Not even sure I need to replace the old ones yet. How long do they usually last in our cars if all set up ok? Err, 20K? More? I can't remember the last time I replaced plugs. In my spitfire with teh ford engine they were in the engine befor eI rebuikt it, and done 30K more with me. But they are about £40 a set I think. In my TR7 engine in my toledo, again reused the plugs that did 25K, all still fine. I did get some Bosch plugs to fit, but never got around to it. Just carry some spares. Link to comment Share on other sites More sharing options...
cliff.b Posted January 29, 2023 Author Report Share Posted January 29, 2023 4 minutes ago, clive said: Err, 20K? More? I can't remember the last time I replaced plugs. In my spitfire with teh ford engine they were in the engine befor eI rebuikt it, and done 30K more with me. But they are about £40 a set I think. In my TR7 engine in my toledo, again reused the plugs that did 25K, all still fine. I did get some Bosch plugs to fit, but never got around to it. Just carry some spares. Maybe I will save my money then. Nowhere near that sort of mileage yet. Link to comment Share on other sites More sharing options...
dougbgt6 Posted January 29, 2023 Report Share Posted January 29, 2023 On the other hand I had a misfire which turned out to be a plug, only done 2K! I considered myself unlucky and replaced all with NGK. Doug Link to comment Share on other sites More sharing options...
NonMember Posted January 29, 2023 Report Share Posted January 29, 2023 41 minutes ago, cliff.b said: Not even sure I need to replace the old ones yet. How long do they usually last in our cars if all set up ok? 19 minutes ago, dougbgt6 said: On the other hand I had a misfire which turned out to be a plug, only done 2K! I think it depends a lot on the car. Of my three, the only one that "gets through" plugs is the GT6. That's also the only one that's been properly set up. It also won't run at all on Champion - it must be NGK and they must be renewed annually. The other two really don't care and keep going just fine on whatever they had fitted five years ago. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 29, 2023 Report Share Posted January 29, 2023 1 hour ago, cliff.b said: How long do they usually last in our cars the service schedule used be 10,000 miles for a plug change of the day the ngk bpes in the 2000 fitted in 2015 and still going fine with a re gap every year Pete Link to comment Share on other sites More sharing options...
cliff.b Posted January 29, 2023 Author Report Share Posted January 29, 2023 1 hour ago, Pete Lewis said: the service schedule used be 10,000 miles for a plug change of the day the ngk bpes in the 2000 fitted in 2015 and still going fine with a re gap every year Pete I'm not experiencing any problems 🤞 so I think I will just inspect and gap them this year. Link to comment Share on other sites More sharing options...
Chris A Posted January 29, 2023 Report Share Posted January 29, 2023 1 hour ago, Pete Lewis said: the ngk bpes in the 2000 fitted in 2015 and still going fine with a re gap every year My 13/60 came with NGKs, back in 2015, I fitted replacements in 2018 which have done 5K miles and have been regapped once maybe twice. The originals are in my spares kit as known working replacements in case of need. Link to comment Share on other sites More sharing options...
PeteH Posted January 29, 2023 Report Share Posted January 29, 2023 No idea what mine are in the P-107, suppose I should look, but they work fine all 3 of them. The generator is the worst, that is an NGK and has just had a replacement, allegedly should be OK but (pull) starting is still a BIG issue. Lately my Chain saw has been playing up as well. It soots the plug, but reducing the Oil might be the cure 40:1 rather that the recomended 20:1?. I think the ones in the 13/60 engine are NGK or Champion, either way they are only finger tight and there to stop the crap getting in. Whats the alleged issue with "irridium"? plugs?. Pete Link to comment Share on other sites More sharing options...
Chris A Posted January 29, 2023 Report Share Posted January 29, 2023 1 hour ago, PeteH said: No idea what mine are in the P-107 Can't find them in my Yeti. But there is a clue why - I fill it with Gasoil Link to comment Share on other sites More sharing options...
PeteH Posted January 29, 2023 Report Share Posted January 29, 2023 26 minutes ago, Chris A said: Can't find them in my Yeti. But there is a clue why - I fill it with Gasoil Ahh?. Part time Glow pluggy things?. Pete Link to comment Share on other sites More sharing options...
cliff.b Posted April 17, 2023 Author Report Share Posted April 17, 2023 Just as a follow on to this, I had all the plugs out today to do a compression test, as I had access to a gauge, and noticed they are NGK BP6ES, which is what I was sold for a Spitfire, but I now see the 1500 engine specifies a BP5ES. Just wondered if anyone knows why it is different to the 1300s and what, if any, difference it might make. Seems to run ok but that is what has been in there since I bought the car. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 17, 2023 Report Share Posted April 17, 2023 the 5 withstands hotter temperatures than the 6 overall not really a major difference both would be pretty much OK all due to emmisions the 1500 would by design run leaner/hotter and also had a 88C coolant stat pete Link to comment Share on other sites More sharing options...
cliff.b Posted April 17, 2023 Author Report Share Posted April 17, 2023 1 hour ago, Pete Lewis said: the 5 withstands hotter temperatures than the 6 overall not really a major difference both would be pretty much OK all due to emmisions the 1500 would by design run leaner/hotter and also had a 88C coolant stat pete Ok, changes due to meeting emissions requirements makes sense. I try to ensure my car doesn't run hot so if that's the reason, it's probably not an issue anyway. Link to comment Share on other sites More sharing options...
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