Spark Plugs

VoodooMaster · Post by **VoodooMaster** » Tue Nov 14, 2006 10:32 am

What spark plugs are recommended and why?
Or what plugs works the best on CA18?

Draco · Post by **Draco** » Tue Nov 14, 2006 11:22 am

The standerd plug is NGK BCPR6ES (hot) BCPR7ES (cold)
I am currently using BCP8ES but I am looking for BCPR9ES, the colder s/plugs help against heat and detonation sothat you don't burn pistons so easily with higher boost.

VoodooMaster · Post by **VoodooMaster** » Tue Nov 14, 2006 11:33 am

I also heard about BCPR7ES but not BCPR8ES. I found that my car is fitted with those triple spark but I think those plugs are catching on the world of SH!T. The car seems to break down under heavy load.

I'll try new plug tonight and see if there is a difference. Does that plugs need to set with a specific gap, cause I was told to set it 0.8, any view points on this.

Daniel · Post by **Daniel** » Tue Nov 14, 2006 11:50 am

a colder plug can handle more boost without its spark being 'blown out'. Im running the BCPR7ES and theyr good till 300 brake

VoodooMaster · Post by **VoodooMaster** » Tue Nov 14, 2006 11:56 am

So technically Derek-SON would be the have better option there with BCPR8ES. Not that I am pushing out more than 300k.

Daniel · Post by **Daniel** » Tue Nov 14, 2006 3:51 pm

I wouldnt recomend running too cold of a plug. Theres a good chance the plugs would foul up

The heat range of a plug is the amount of protrusion of the insulator - if the plug is too hot it cracks the ceramic white bit, too cold and the carbon doesn't burn off and the insualtor becomes a conductor = no spark.

Draco · Post by **Draco** » Wed Nov 15, 2006 8:08 am

Daniel could be right but I have not seen any of these problems on my car and I am also running a 0.6mm gap, no probs with plugs and and....

VoodooMaster · Post by **VoodooMaster** » Thu Nov 16, 2006 9:08 am

Gentleman I am a believer.
NGK BCPR7ES Damn those plugs are good. Changed my plugs and the devils came out. Clean throughout the rev range and boosting 0.9bar.

Took the car against Merc C320 (chipped) and Golf GTi Mk5 and it was neck and neck from the word GO.

Moral of this story: DON"T USE TRIPLE SPARK.

Dislex666 · Post by **Dislex666** » Thu Nov 16, 2006 9:26 am

BCPR7ES - yep - that's the stuff.

Had them in my car right up till the bearing went *BOOM* putting heat range 7 NGK iridium's now

The Calibrator · Post by **The Calibrator** » Wed Nov 22, 2006 7:08 am

a colder plug can handle more boost without its spark being 'blown out'. Im running the BCPR7ES and theyr good till 300 brake

The heat range of a plug is the amount of protrusion of the insulator - if the plug is too hot it cracks the ceramic white bit, too cold and the carbon doesn't burn off and the insualtor becomes a conductor = no spark

Both of the above statements are incorrect. A colder plug has a shorter INTERNAL heat path this allows the electrode to run cooler a hotter plug has a longer internal path and thus the electrode runs hotter.

The reason for this is to allow the electrode to be kept at the correct temperature to burn off carbon deposits.
Running things like 8's and 9's on road cars will lead to hard starting and missfiring once they start to foul.

Running too hot a plug will allow the electrode to become a hotspot promoting detonation and preignition.

The bigger the plug gap the bigger the spark but the more easily the spark will be snuffed out at high boost and rpm.
Most stock coils also cannot produce a spark strong enough to ignite the mixtures under boost with a big plug gap.

Running smaller than .55mm will cause poor idling on most cars due to the small spark so run the biggest gap your combination can handle without missfiring under boost at high rpm.

ChemCool · Post by **ChemCool** » Wed Nov 22, 2006 10:02 am

Hit them

They dont want to listen

Draco · Post by **Draco** » Wed Nov 22, 2006 11:22 am

I am not contesting anybody, all I am saying is I was and am still driving on BCR8ES plugs and tha car has no idling probs, no boost probs no starting probs no nothing but good stuff.

The way I see it, if any plug fouls up it is broken and will cause probs wheather it is a hot cold cheap expensive....., obviosly eridiems will last longer.

Charl · Post by **Charl** » Sat Sep 29, 2007 1:31 pm

you can get the same heat range in both plugs, but one comes without the resister which makes it BCP7ES do we need the resistor if we run coil packs? Or does that not have anything to do with it?

ChemCool · Post by **ChemCool** » Sat Sep 29, 2007 11:41 pm

you can get the same heat range in both plugs, but one comes without the resister which makes it BCP7ES do we need the resistor if we run coil packs? Or does that not have anything to do with it?

Me understand it this way: Also got it from internet reading:
Resistor prevent induction and noise into nearby electronics like ECU.
If not for that possability, it would be great running sparkplugs without those resistors. Less resistance better spark. I still need to be put at ease with the electronics interference. So , I am still not that sure.

Phinx · Post by **Phinx** » Sat Sep 29, 2007 11:58 pm

Bcp7es all the way