4AGE 20v shallow electrode spark plug

**4000GT** · 01-10-2011, 02:07 PM

So we are running a lot of compression in the 20v, and the stock plugs are slightly interfering, does NGK or similar do a spark plug with an electrode that doesnt protrude as much? I heard there is, but looking for a part number, cheers!

**oldcorollas** · 01-10-2011, 05:38 PM

stock is NGK bkr6ep?
NGK Spark Plugs Australia

NGK code guide is linked here
NGK Spark Plugs USA

B=14mm
K= 5/8" hex AND projected tip.

to remove projected tip, you need BCR type..
like this? NGK SPARK PLUGS / NGK SPARKPLUGS - BCR8ES - 5430 :: £2.72 :: NGK Spark Plugs & Denso Sparkplugs :: NGK SPARK PLUGS - BCR ::

**4000GT** · 01-10-2011, 06:14 PM

Ah ok, I thought it may have been the "E" which would need to be different, Ill have a look at those. How did you come by that information? Do you use them?

**oldcorollas** · 01-10-2011, 06:32 PM

E is 19mm thread reach. you don't really have any option on reach, except for maybe using washer between plug and head (like used to be done for "indexing" )

I don't use em and have no idea, just going by the codes.

here, NGK says BKR5EYA-11 or BKR5EIX-11 for iridium (edit, BKR is same as the old BCPR.. just the C and P are combined into K)
NGK Spark Plugs Australia

YA is special design V groove centre with 2.5mm insulator
IX is high performance iridium

no idea at all if they make a bcr in the type you need.
ford fiesta seems to use BCR8ES Spark Plug for FORD FIESTA (89-->96) 1.6l 1600cc from 6 / 1990 to 2 / 1992 5430 BCR8ES: Amazon.co.uk: Car & Motorbike

**fixeruperer** · 01-10-2011, 06:55 PM

i run bcpr6es in my 4age with a haltech. bcr6es is with the non projected tip. how much room do you need ? i think if you need that much youll need to use a washer under the plug and go up a heat range on the plug. but due to the amount of compression, you could probably leave the 6's in there.

**dnegative** · 01-10-2011, 07:46 PM

Shim them up?

**4000GT** · 02-10-2011, 09:02 AM

Apparently there is a "Racing" plug which sits flat in the chamber, Ill have to do some more hunting...

**4000GT** · 02-10-2011, 09:04 AM

Originally Posted by fixeruperer

i run bcpr6es in my 4age with a haltech. bcr6es is with the non projected tip. how much room do you need ? i think if you need that much youll need to use a washer under the plug and go up a heat range on the plug. but due to the amount of compression, you could probably leave the 6's in there.

Yeah I might have to run the BCP's and then run a brass shim washer, im running 15:1 compression.