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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,398
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I've alternated between NGK B8ES or NGK racing (don't remember the number off the top of my noggin). Both are copper. That doesn't make me an expert any more than the rest of the commentators here....but it's what I use and I use what seems to work for me. Y'all are free to use what you want, but the science of heat transfer rates can't be disputed, unless you don't "do" science 'cause you failed it in high school and settled on a career as a librarian
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. |
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Registered User
Join Date: Oct 2012
Location: Austin Texas
Posts: 133
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explain... " uh , no " gets nothing done ![]() I have never heard of anyone recommend running platinum or iridium plugs in a forced induction engine that has been modified. I know you sure as hell don't do it with nitrous or a lot of boost..... whats the point? you going to put 100K on one of these cars without changing the plugs? "uh, no"
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'77 911S Coupe 3.2 Turbo '76 911S Coupe 3.0 964 cams...no sunroof '75 911S Cabbie 3.2 SS Web cams & 46mm Webers '73 914 1.7 Webers & Header ... sold '74 VW 1303S 1600cc DP Web 110 & Solex |
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Ingenieur
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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I did the rounds talking to various individuals with practical knowledge in this area. All have had no issues with iridium plugs. Richard Clewett actually recommends NGK Iridiums for my Tec3r.
My guess on the video: Water cooled cars run WAY more boost than we do. 2 BAR isn't uncommon for a full tilt EVO with a big Garrett turbo. At that heat and pressure, thermal conductivity likely comes into play. At .8 - 1.2 BAR in a 930, not so much.
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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Ingenieur
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While pre-teen Tippy demonstrated the kind of scientific inquisitiveness that would guarantee him success in later life, his experimental technique was fatally flawed in this instance. As you bend the gaps open the electrode alignment (side to center) is messed up.
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Ingenieur
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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^ this is also what I discovered: Electrode, one material. Body, another.
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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Ingenieur
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Banned
Join Date: Nov 2001
Location: top of 3rd
Posts: 4,336
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You seem to have this bizarre hang up against Zorks - how / where did Zorks so wrong you I wonder?
![]() Yeah, because I've had soooo many people driving behind me exclaim about my spark plugs "WOW! That is EARGASMIC!!!". Oh, wait... that's exactly what was exclamated by folks following me @ der recent turboPALOOZ'er... about... my... Zork. Things that make ya go hmmm... ![]() ![]() |
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Registered
Join Date: Sep 2012
Posts: 106
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After 2 solid pages I still do not know what plugs should I use on my standard modified 1978 (Kokeln IC, Kokeln turbo 3.4 P/C, 7.5 compression and BB headers).
Are W3DO0 good or not? And, how often to change them driving aggressively on the street but no track? |
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Banned
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,559
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Quote:
![]() Oh, and be sure to post about it so Speedy Squirrel can have something good to read! Last edited by Ronnie's.930; 08-19-2015 at 03:24 PM.. |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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Quote:
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood ![]() |
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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,398
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Quote:
Originally Posted by Tippy View Post I did a science experiment in middle school on spark plugs. I did this by using my lawnmower and a rig to hold the gaps for the spark to jump. I simply moved each plug further away until no spark.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. |
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Banned
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,559
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So Cory, did you touch the plug tips, and/or wire leads, to any errr, ummm body parts to see what it felt like (when the teacher wasn't looking)?!?!
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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Quote:
I never knew my pre-teen anecdotal experiment would get so much play...... ![]()
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood ![]() |
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Ingenieur
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If you have the stock CD ignition and wires, W3DPO is for you.
This link to a previous post covers spark plugs in detail. http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/837537-best-spark-plugs.html |
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Ingenieur
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All spark plugs have copper cores, and "copper plugs" actually have a Nickel plated center electrode.
The small center electrode of modern plugs run at the same temperature as previous plugs. They have the same heat ranges available. They present a smaller area to conduct heat into the electrode, and they have a smaller mass to cool down. Actually, I think you would be hard pressed to cause pre-ignition with a spark plug in a 930. The exhaust valve is going to get you first when you push things out to the edge. Search on the late JBL930's posts for the worst pre-ignition I have ever seen in a 930. One last though, a vehicle I helped develop Is the Alfa 4C, 21.8 psi boost, 1.7L, 237HP, running NGK R 0.4mm center electrode. Quote:
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Ingenieur
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It's all good. I just wanted to yank your chain and see how many emoticons and bold font vowels you would cough up!
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Registered
Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,261
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Funny story... was pulling apart a blown up Boxster motor yesterday to start a rebuild and it had three Autolites and three Champions in it. People will use anything!!!
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JB - BreitWerks www.breitwerks.com 321-806-8664 Engine Rebuild & Restorations |
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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^ That is some Space Coast engine-uity!
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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