sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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Right my spark plugs are NGK BKR6EK's or near enough but got new one's and they are NGK BKR5EK's they work fine but can't remember if for NGK's they burn hotter the higher the number or lower the number.
anyone know? and should i get the proper 6EK's?
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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yo
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johnhara1
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Registered: 19th Oct 06
Location: Newcastle upon Tyne
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Higher the no the colder they run.
2 = Hottest
10 = Coldest
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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good so mine are hotter which means about 200bhp extra i know some companies do it the other way around iirc
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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You want to use the coldest plug you can get away with without it fouling up, too hot a heat range plug can cause pre ignition 
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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no sign of that yet, i thought the hotter the better so the gas expands faster?
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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Not really, a hot plug sends less of its heat into the cylinder head which means the tip stays hotter. Too hot and it will ignite the fuel/air mix on its own without having a spark sent to it....while your piston is still on its way up... causing damage
A colder plug sends more heat to the head meaning it runs cooler so wont ignite the mix by its self but if it stays too cool carbon can build up on it causing it to fail.
Normally you stick with the same heat range the manufacturer recommends unless you have tuned it a fair bit
[Edited on 19-12-2007 by luke85]
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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do you think i will be lossing power just now then? i can't notice the difference.
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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Its unlikely your losing power but you cant "gain" power by changing the heat grade. What engine is it and what state of tune is it? if the plug is too hot you have to listen out for pre ignition which is an engine killer
[Edited on 20-12-2007 by luke85]
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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it's just a x12xe but no noises it's running fine, i was given them for this car by an autospares shop so must have come up in their computer.
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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6 are the correct ones for that engine but you will be ok with 5s, just didnt want to hear you were running them on a high boost LET!
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sand-eel
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Location: carluke/braidwood--IRNBRULAND
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cheers anyway
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
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sooo what are the best plugs fro a x14xe with just full exhaust and de restricted air box run on as i have a kind of pinking noise at 3k
using bosh supers at the mo
[Edited on 20-12-2007 by Richardhhha]
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
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anyone?
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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Ill have a look when i get home for you mate, working till 10. The NGK BKR6EK's that sand eel has are awesome plugs, but you need them gapped correctly and the right heat range. NGK will say on their website
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by Richardhhha
sooo what are the best plugs fro a x14xe with just full exhaust and de restricted air box run on as i have a kind of pinking noise at 3k
using bosh supers at the mo
[Edited on 20-12-2007 by Richardhhha]
standard bosch or ngk plugs.
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
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hmm its trying to get ngk's to fit lol. i normally get me plugs from halfords and well if i go NGK i cant get the right ones, every time they are to big....... so i have to go bosh supers to fit...
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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How do you mean they dont fit exactly? NGK reccomend the BKR6EK for that engine so they should be a straight swap
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
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if i go for the plugs they say in the book they dont fit. Got to go halfords tonight to get oil so will pick up the 6 ones
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