Spark Plugs for 930, NGK?

[RarlyL8]

I went to several auto parts stores in a vain attempt to find the coveted Bosch W3DPO plugs I have used for years in the turbo. No luck except one store that cross referenced them to NGK Iridium BR8EIX 5044.

Have you guys used these? Are they as good as the Bosch plugs? They are 1/2 the price and have this tiny tip that looks easy to foul.

Thanks for the help!

[PrimeMvr]

I've been using plain ol NGK R5671A-8 with good success. These are non resistor though as I have MSD ignition. The only thing I don't like is they are the smaller form factor and I can't use the Porsche plug tool which I think is an ingenious little bugger

[Ronnie's.930]

WOW - sparkplugs.com shows the same crossreference!

Sparkplugs.com - Cross Reference Search Results

[proffighter]

BP8ES(or BPR8ES if needed resistor). Used this for years without issues on my 930 with CIS

Iridums of course will last longer...

Here are the NGK recommondations:

911 Turbo 3.3 300 221 1978 - 1980 930.60 Gap 0,7 BPR9EIX 6853
911 Turbo 3.3 300 221 1981 - 1989 930.66 Gap 0,6 BP8EVX 2671

Conversion according NGK: W 3 DP0 = BP8EVX

[RarlyL8]

Thanks guys, that's the same cross reference we came up with. So these plugs worked well for you, that's what I needed to know. I'll give 'em a try.

[wjfk32]

www.kennebell.net/techinfo/general-info/SPARKPLUGS.pdf

I use W24ESR-U copper plug with great success. gapped 28-32 out of box. $2/change each.

My mechanic 996tt-24/18g-EPL-Tuned used ngk iridums-constant miss on top end...Changed to Bosch-Copper no problems since.


Walt

[mark houghton]

Been using NGK R5671A-7 for the last 3 years, prior was using NGK BPR8ES. No issues with either.

[wjfk32]

Originally Posted by mark houghton

Been using NGK R5671A-7 for the last 3 years, prior was using NGK BPR8ES. No issues with either.

Greetings-Mark

Has your boost been holding on Top-End with a hotter plug than the colder 8?
Any difference?


Thxs

Walt

[mark houghton]

Originally Posted by wjfk32

Greetings-Mark

Has your boost been holding on Top-End with a hotter plug than the colder 8?
Any difference?


Thxs

Walt

Honestly Walt, I haven't noticed any difference. I went with the slightly hotter range since I felt the 8's were a little more "sooty" than I liked, because my car sees mostly docile city and highway miles and likes to run a tad on the rich side. Running .04" gap with a good strong MSD deliverd spark.

[cellison]

Originally Posted by proffighter

BP8ES(or BPR8ES if needed resistor). Used this for years without issues on my 930 with CIS

do these particular NGK plugs fit the porsche spark plug spring socket?

[xbmwguy]

the iridiums are great for higher boost cars and efi, even smoothed out my idle, but i ran the bp8es for many years with no problems before efi

[RarlyL8]

To follow up, the NGK Iridium BR8EIX 5044 were installed a couple months ago. The idle is not as smooth as I would like but that may be no fault of the plugs as this fuel system has not been rebuilt yet. Overall I would say at this point they seem to be doing as well as the Bosch plugs in this stock engine.

[proffighter]

Originally Posted by cellison

do these particular NGK plugs fit the porsche spark plug spring socket?

These come (at least here in Europe) with the clip top, actually a nut

[Hirevtuner]

Brian I use and like the W3DPO plugs but they are $$
I have tried and had great luck also with Denso Iridium IW24 plugs. Just FYI
Cheers

[MarkRobinson]

ngk BKR6EK Is factory cool plug for '94 3.6 turbo: I use those. In my race-turbo cars I use a NGK BKR7E as they're cheap and one heat range cooler.

Used these plugs for years, hundreds of thousands of high-performance turbocharged miles w/o a hickey.

mark

[David]

I run the NGK iridium plugs in my 930 and I think they're OK but lately I have an issue above 6,000 but I think it's the CDI.

[WERK I]

Street or Track?
IMHO, NGK's are very good for street applications, but for track and constant high combustion chamber pressures, I would recommend the Iridiums. Adjust your heat ranges according for street or strip.