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Finally, just to add some more info and thoroughly beat this horse senseless  …...

I also made a call to NGK USA headquarters and talked to a tech who after looking up NGK ILFR7B8, told me that if I want a plug with the identical specs (as to heat range, gap, projection, etc.) and that is readily available , I can go with NGK's LFR7AIX plug.  The only difference is that the "IX" series plugs do not use a platinum tip on the ground, hence the shorter recommended life span of 40-50K miles.

By way of comparison, NGK's representation for the "Laser Iridium" series (stock) plug life span is  80-100K miles, as it uses platinum as well as iridium.

I know ….. TMI   :D

Jack
2008 2-Eleven
2015 Exige V6 CupR
Track videos ... http://www.youtube.com/jackcup
2010 Lotus Challenge Series ULTRA Class champion
2012 Lotus CUP USA OPEN Class champion

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After much digging around I think I understand the spark plug story with the V6 SC. The plug used is an NGK ILFR7B8 This is a plug that is specific to lotus. Currently unavailable on the aft

OEM from DENSO - go to Elise-Parts where they are around 1/3 of the price that Lotus will charge you (circa Euro 105 for 6).

@MartynB--that's been my problem as well, as I'd like to get an extra set of plugs in hand.  I did find this (finally) searching for ILFR7B8...... http://japansparkplugs.com/boutique/en/denso/65-

Much appreciated Dave

Yes, that style of tool is fine, I was thinking of the coin style, like this...

https://www.amazon.co.uk/Silverline-202148-0-5-2-55-0-02-0-1-Inches/dp/B00865SXQ4

...but it's horses for courses. The coin ones spread the load over more of the ground electrode and shove less metal into the nose area, so give me a slightly warmer feeling.

I reckon you'll be fine, as not everyone is cool with gapping their own plugs, as you say it's a technical job and not everyone is technical.

:thumbup:

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  • 1 year later...

NGK also makes a racing plug that will work.....R7438-8 (same heat range as stock, I believe) or 1 step colder....R7438-9.  Lotus supplies the latter in their GT4 Evoras.

Monkeywrench has these ....... https://www.monkeywrenchracing.com/product/ngk-spark-plug-1-2gr-fe-1-step-colder-iridium/

Jack
2008 2-Eleven
2015 Exige V6 CupR
Track videos ... http://www.youtube.com/jackcup
2010 Lotus Challenge Series ULTRA Class champion
2012 Lotus CUP USA OPEN Class champion

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Forgive me if already spelt out in this thread and I haven't been able to uncover it... but what is the exact spec of the Lotus ones?

These HKS ones have the following spec and trying to understand if a good option if we find Lotus continue to be on back order! Thank you in advance to anyone who can help :)

HKS (50003-M45-iL)

Long Reach Type

Thread Size: 14×26.5mm

Wrench Size: 16mm

Heat Range: NGK #9

0.6mm Iridium Alloy Center Electrode

https://www.part-box.com/hks-super-fire-racing-m45il-spark-plug-50003-m45-il

https://www.hks-power.co.jp/en/product/plug/m_series/index.html

www.alias23.com

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What part number are you looking at Imran, I'll check the ETA for you. 

88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

Evora NA

For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. 

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21 hours ago, alias23 said:

These HKS ones have the following spec

There is no reason at all to go for HKS over NGK, unless you just like to pay some more for nothing. I'd not be surprised is HKS spark plugs are OEMed by NGK.

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=http://ngkntk.co.uk/wp-content/uploads/2011/03/NGK-Press-Releases-2011-Lotus-Evora.pdf&ved=2ahUKEwio36vK5sTcAhVrJMAKHQXADzEQFjASegQIBxAB&usg=AOvVaw0TAXMBCNcbxghzWUq-DMMk

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1 hour ago, vd9 said:

The HKS ones are actually cheaper than what Lotus is quoting. 

www.alias23.com

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11 hours ago, alias23 said:

The HKS ones are actually cheaper than what Lotus is quoting

So most likely it is possible to buy NGK spark plugs in three different boxes (Lotus, HKS and NGK), and Lotus is more aggressive with markup / carry higher overheads than HKS.

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1 hour ago, vd9 said:

So most likely it is possible to buy NGK spark plugs in three different boxes (Lotus, HKS and NGK), and Lotus is more aggressive with markup / carry higher overheads than HKS.

As per the earlier comments in this thread... folks can not source the NGK specific spark plug at the specific specification recommended here in the UK. It appears to be an exclusive to Lotus hence the HKS question to understand how different it is from the lotus spec given it’s recommended by a lotus team.

www.alias23.com

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21 hours ago, alias23 said:

Thanks @Bibs part number I believe is A132E6503F

Coming back into stock at the end of this week! 

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88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

Evora NA

For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. 

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  • 7 months later...

So summarizing everything where I can order 6 spark plugs iridium and better than OEM?

Any help is really appreciated.

 

Thanks in advance 

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4 hours ago, FF said:

So summarizing everything where I can order 6 spark plugs iridium and better than OEM?

Any help is really appreciated.

 

Thanks in advance 

Give Dave @Seriouslylotus a call or @Bibs who may be able to get them via the TLF store 

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www.alias23.com

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