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| BPR5ES or BPR6ES https://www.ausmini.com/forums/viewtopic.php?f=2&t=97769 |
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| Author: | jme [ Sun Sep 16, 2018 3:44 pm ] |
| Post subject: | BPR5ES or BPR6ES |
I'm changing the spark plugs, engine is 1275 with twin 1.25 SUs and very mild cam, what is the consensus on the best spark plugs? |
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| Author: | Stibbsy [ Sun Sep 16, 2018 4:23 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
jme wrote: I'm changing the spark plugs, engine is 1275 with twin 1.25 SUs and very mild cam, what is the consensus on the best spark plugs? Champion N9Y or N9YC cooper core and you can still buy them. |
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| Author: | DavidE [ Sun Sep 16, 2018 5:07 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
Stibbsy wrote: jme wrote: I'm changing the spark plugs, engine is 1275 with twin 1.25 SUs and very mild cam, what is the consensus on the best spark plugs? Champion N9Y or N9YC cooper core and you can still buy them. One two many "o"s and one too few "p"s? |
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| Author: | AEG163job [ Sun Sep 16, 2018 8:03 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
Are these any good? https://www.ebay.com/itm/CHAMPION-SPARK ... 2749.l2649 |
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| Author: | drmini in aust [ Sun Sep 16, 2018 9:29 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
NGK BPR5ES these days. Rumour has it resistor plugs give a hotter spark, BP recommend 1 heat range hotter for unleaded fuel, NGK plugs are made in Japan, not Mexico or elsewhere. |
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| Author: | 850 GT [ Sun Sep 16, 2018 10:01 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
NGK all the way, have used them in race cars for years. no probs. |
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| Author: | Matt I [ Sun Sep 16, 2018 11:35 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
NGK BP5ES over here, 10:1cr 1275 with a cam. |
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| Author: | simon k [ Mon Sep 17, 2018 9:23 am ] |
| Post subject: | Re: BPR5ES or BPR6ES |
yeah, 5's are what you want |
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| Author: | jme [ Mon Sep 17, 2018 12:43 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
I previously had problems with plug fouling in the queue for the motorkhana where it idles for ages (maybe 15-30 minutes) and only has a 30 second or less run before waiting another 15-30 minutes in the queue. Is it worth going one heat range hotter (i.e. BP6ES)? |
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| Author: | gtogreen1969 [ Mon Sep 17, 2018 12:51 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
5 is hotter than 6 Attachment: ngk chart.jpg
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| Author: | AEG163job [ Mon Sep 17, 2018 1:06 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
jme wrote: it idles for ages (maybe 15-30 minutes) and only has a 30 second or less run before waiting another 15-30 minutes in the queue. Not sure letting an A series idle for prolonged periods is such a good idea. Less/insufficient splash lubrication for the bores/pistons at low engine speeds. But waiting in a 'khan queue maybe no options, unless you push it along! |
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| Author: | GuamMini [ Thu Feb 28, 2019 3:27 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
I was using a BP6ES and it fouls after idling for a while so now I am going to try a BPR4ES. My question is on my 1973 Clubman GT do I use 91 or 87 unleaded fuel or do I use a lead additive and which octane fuel rating? thanks |
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| Author: | gtogreen1969 [ Thu Feb 28, 2019 3:35 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
GuamMini wrote: I was using a BP6ES and it fouls after idling for a while so now I am going to try a BPR4ES. My question is on my 1973 Clubman GT do I use 91 or 87 unleaded fuel or do I use a lead additive and which octane fuel rating? thanks Use 95 or 98 fuel. Why are you jumping BP5 and going straight to BP4? |
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| Author: | timmy201 [ Thu Feb 28, 2019 4:23 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
I think Guam would use the same octane rating as the US: 98 RON (AUS) is about the same as 93 AKI (US) 95 RON (AUS) is about the same as 91 AKI (US) |
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| Author: | GuamMini [ Thu Feb 28, 2019 4:51 pm ] |
| Post subject: | Re: BPR5ES or BPR6ES |
gtogreen1969 wrote: GuamMini wrote: I was using a BP6ES and it fouls after idling for a while so now I am going to try a BPR4ES. My question is on my 1973 Clubman GT do I use 91 or 87 unleaded fuel or do I use a lead additive and which octane fuel rating? thanks Use 95 or 98 fuel. Why are you jumping BP5 and going straight to BP4? I am tired of buying plugs so I thought 4 should be better. The 6 lasted for a few months. Yes we have 87 and 91 AKI. No 93. Do I need to add a lead substitute? I have not been using one. |
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