Hi,
Seems I picked up some BR7ES plugs instead of BPR7ES... will this cause much a problem?
Thanks!
Br7Es Vs Bpr7Es
Started by
crackfoo
, Jun 22 2015 12:26 AM
7 replies to this topic
#2
A-Cell
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Posted 22 June 2015 - 07:18 AM
Yes. The ones you have bought have a recessed tip so firing pattern and heat range will be wrong. Likely to be a hotter running plug and could cause pre-ignition (pinking).
Standard plug is BPR6ES in any case, the BPR7ES is a colder running plug for higher compression tuned engines.
Standard plug is BPR6ES in any case, the BPR7ES is a colder running plug for higher compression tuned engines.
#3
Dusky
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Posted 22 June 2015 - 07:34 AM
I Would dissagree on this one, as I think the heatrange is still the same, the recessed tip should be already acounted for by the manifacturer
#4
A-Cell
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Posted 22 June 2015 - 07:45 AM
Dusky, have a look at pictures of 2 plug types! The BR7 is sold for small cc 2 stroke engines. The BPR7 has an extended nose to run cooler.
#5
Guess-Works.com
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Posted 22 June 2015 - 08:05 AM
The R signifies that it has built in resistance for use with electronic ignition and rf suppression. You'll be fine.
#6
Swift_General
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Posted 22 June 2015 - 08:16 AM
Dusky, have a look at pictures of 2 plug types! The BR7 is sold for small cc 2 stroke engines. The BPR7 has an extended nose to run cooler.
+1. I don't think I'd be happy using the recessed tip of the BR7ES.
#7
Dusky
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Posted 22 June 2015 - 08:52 AM
yes, but the heat range of a plug is also because of the internals of the plug, this recessed nose plug will probably have like the internals of a heat range 9 plug, granting a total heat dissipation of a range 7 plug, atleast thats what ngk told me when i was asking about multispark plugsDusky, have a look at pictures of 2 plug types! The BR7 is sold for small cc 2 stroke engines. The BPR7 has an extended nose to run cooler.
#8
crackfoo
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Posted 22 June 2015 - 11:39 AM
I have been running the BPR6ES's and now since it's summer I seem to be running warm. Was fine in the cooler weather last fall so I figured I'd try a cooler plug and had a moment of dyslexia and didn't notice they were wrong. I do have a 1380 276 kent cam but I'm not sure the actual compression ratio but I'm sure it's pretty high so I think I should probably be running the 7's regardless.
I did search the BR7 plug and did notice there were a lot of results for small cc engines. So I think perhaps I'll try and get back for an exchange.
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