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Crotchety Old Bastard
 
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Spark Plugs for 930, NGK?

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!

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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 04-19-2012, 05:36 PM
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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
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Old 04-19-2012, 08:36 PM
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WOW - sparkplugs.com shows the same crossreference!

Sparkplugs.com - Cross Reference Search Results
Old 04-19-2012, 09:31 PM
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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
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Roland

930 Turbo '81 Too many modifications to list
Old 04-20-2012, 01:29 AM
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Crotchety Old Bastard
 
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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.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 04-20-2012, 04:41 AM
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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

Last edited by wjfk32; 04-20-2012 at 05:13 AM..
Old 04-20-2012, 05:11 AM
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Been using NGK R5671A-7 for the last 3 years, prior was using NGK BPR8ES. No issues with either.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 04-20-2012, 05:47 AM
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Quote:
Originally Posted by mark houghton View Post
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
Old 04-20-2012, 06:00 AM
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Quote:
Originally Posted by wjfk32 View Post
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.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 04-20-2012, 11:34 AM
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Quote:
Originally Posted by proffighter View Post
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?
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Old 06-24-2012, 01:20 PM
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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
Old 06-24-2012, 02:36 PM
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Crotchety Old Bastard
 
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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.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-24-2012, 02:56 PM
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Quote:
Originally Posted by cellison View Post
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

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Roland

930 Turbo '81 Too many modifications to list
Old 06-24-2012, 04:12 PM
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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
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Old 06-24-2012, 04:59 PM
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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
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Old 06-25-2012, 11:04 AM
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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.
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Old 06-25-2012, 04:33 PM
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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.

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Old 06-25-2012, 06:19 PM
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