Spark plug refence and how to read them

**biggo** · 25th December 2008, 11:24 AM

20v plugs are BKR6EYA11

16v Bigport is BCPR5/6E .8 i think
Smallport is the same cept with 1.1mm gap.

Its been awhile so i may have them mixed up?

**Trev084** · 5th January 2009, 10:52 PM

Yeah you have them mixed up.

16v Bigport is:
BCPR5E-11
BCPR6E-11

Smallport is:
BCPR5E-8
BCPR6E-8

**biggo** · 6th January 2009, 06:24 AM

cheers for that bro

**Trev084** · 6th January 2009, 10:16 AM

No probs, I still dunno why they changed them.

**KE70** · 6th January 2009, 02:55 PM

So if im running a bigport with heaps more comp (shaved head/block and thinner HG) would it be better to run the smallport plugs?

**Trev084** · 6th January 2009, 05:09 PM

The race cars at work run 1.1 plugs and they are extensively worked.

**Dylan** · 7th January 2009, 09:24 PM

wow, have always wondered what those letters and numbers mean

**driftke70** · 4th February 2009, 01:09 PM

I always knew how to read them for motorbikes, but never knew what the extra bits were for cars, cheers

**ae86runna** · 26th February 2009, 02:03 PM

are these numbers the same across diff brands?

**biggo** · 26th February 2009, 08:35 PM

no, NGK are the most popular. But you can cross referance other brands with the ngk book.

Thread: Spark plug refence and how to read them