Author Topic: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?  (Read 1576 times)

ansys

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BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« on: September 25, 2022, 10:16:42 PM »
The recommended iridium spark plugs are pretty expensive here for putting into my cheap daily driver fit. Has anyone put copper plugs into their L13 vtec fit?
I was thinking to go with the NGK BKR6E-11. Any reason I can't use these plugs? The iridiums are gapped to 1.3mm, should I gap the BKR6E-11's to 1.3? or leave them as is?
Thanks!

Jocko

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #1 on: September 26, 2022, 10:07:24 AM »
2002? I thought the V-TEC was only available as a 1.5 back then. There is no reason why you cannot use non-Indium plugs as long as you change them at the shorter service interval. You will have to gap any plugs you fit to 1.3 mm.

olduser1

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #2 on: September 26, 2022, 10:16:04 AM »
Pop your Jazz/Fit details into NGK catalogue online, your choice will be displayed

Ngkpartfinder co uk

ansys

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #3 on: September 26, 2022, 12:05:34 PM »
in the 2nd gen, both the 1.3L and 1.5L are vtec.  It's only the first gen 1.3 that is i-dsi I believe.  I've got a 2008, 2nd gen JDM Fit.

Thanks! the website only lists the DIFR6D13 as an option.  Those plugs go for over 50 NZ$ per plug.

Jocko

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #4 on: September 26, 2022, 12:20:07 PM »
Sorry. Your profile says 2002 and that is what I mistakenly read.

ansys

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #5 on: September 26, 2022, 01:01:53 PM »
no worries!  I did own a 2002 Fit at one point, but now we've got an '03 and '08 fit in the family.

embee

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #6 on: September 26, 2022, 01:03:38 PM »
There are various things you must match when fitting a non-standard plug. Key aspects are heat range and projection of the centre electrode.
Obviously physical stuff like thread diameter, thread length, and possibly hex size if space constrained. Some plugs have fixed terminals, some screwed, check what the cap/coil requires, usually easiest to match if it takes a terminal rather than a thread (unusual these days in a production car), you can use fixed or screwed terminal no issues.
If the heat range and projection are correct I'd say you'll be OK. Leave the plug gap at what it comes as (check but don't alter unless absolutely necessary). Precious metal electrodes are smaller diameter, concentrate charge, and thus reduce the spark voltage requirement compared to a bigger electrode. You can offset this with the bigger electrode by having a slightly smaller gap, otherwise it will tend to load the high voltage side more, with possible reliability aspects. The difference between 1.1 and 1.3mm is unlikely to result in any real perceived effect. Of course you will lose any slight benefit in combustion stability and durability of the precious metal plugs, but your reason is cost so that's your compromise.
Try it and see if you can tell any difference, I suspect you won't in real world use.

In cases where the projection is changed significantly it is quite possible to run into cold starting or fouling issues, I know of cases where people have used non-projected iridium plugs in place of projected nose standard items (due to first sight compatibility aspects) and had cold fouling even though the heat range was the same.

You could check the Denso equivalents, they are often cheaper than NGK here in the UK, possibly also in NZ? It could be a Denso K20TT or IK20TT, but you need to check for yourself.
https://www.gsparkplug.com/ignition/spark-plugs?find=honda-2008-jazz-ii-petrol-1031316089
(PS - I worked in engine design/development for 40yrs).
« Last Edit: September 26, 2022, 01:15:44 PM by embee »

nowster

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #7 on: September 26, 2022, 04:36:45 PM »
If it's the 2009 MY (what we call the Mk2 here), this is the only offered option:

https://www.gsparkplug.com/1x-denso-spark-plugs-dk20pr-d13-dk20prd13-267700-7390-2677007390-3476.html

ansys

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Re: BKR6E-11 spark plugs in a '08 GE6 1.3L vtec fit?
« Reply #8 on: September 26, 2022, 09:50:08 PM »
If the heat range and projection are correct I'd say you'll be OK. Leave the plug gap at what it comes as (check but don't alter unless absolutely necessary). Precious metal electrodes are smaller diameter, concentrate charge, and thus reduce the spark voltage requirement compared to a bigger electrode. You can offset this with the bigger electrode by having a slightly smaller gap, otherwise it will tend to load the high voltage side more, with possible reliability aspects. The difference between 1.1 and 1.3mm is unlikely to result in any real perceived effect. Of course you will lose any slight benefit in combustion stability and durability of the precious metal plugs, but your reason is cost so that's your compromise.
Try it and see if you can tell any difference, I suspect you won't in real world use.

Thanks, that's good to know about the voltage requirements.  I think I'll give those BKR6E-11 (leaving the 1.1mm gap) a go and see what happens.

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