Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 914 & 914-6 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
HMeeder's Avatar
 
Join Date: Sep 2000
Location: San Diego, CA, USA
Posts: 619
Garage
Question Quick Spark Plug Survey

Chance for everyone to sound off. What plugs do you use and why do you favor them over the others? Some guys swear by Bosch, but I suspect that may be more out of loyalty and a desire to be as original as possible.

I Auto-X my stock '72 1.7 and I need to use every advantage available to me to squeeze every last erg of energy out of my fuel.

NGKs? Split-Fire? Platinum? Why?

Many TIA

------------------
Herb
'72 1.7 Tangerine 'Teen
'74 2.0 Red Rustmobile
Old 10-28-2001, 05:07 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
John Rogers's Avatar
 
Join Date: Dec 1969
Location: chula vista ca usa
Posts: 5,208
Post

Hi Herb, hows the car doing? We use Bosch Platinums in our Turbo and NGKs in both 914s. The NGKs seem to burn a little cleaner if the mixture is off a little.
Old 10-28-2001, 03:30 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
3D914's Avatar
 
Join Date: May 2001
Location: Benson, AZ
Posts: 817
Garage
Post

Herb,

I would have to go with the NGK's also. I'm not usually that picky about such things, but when I was working with a local Independent Porsche garage, he replaced my fresh, but weak, Bosch plugs with NGK's and I was quite surprised by the difference. As someone who has been doing Porsche's/VW for over 30 years, he found the Bosches to often faulting. And I get the impression that he was real reluctant to stay with the NJK's (may have something to do with where they're made), but they seem to do the job.

My $.02


------------------
Gerard
74-914 2.0L
3D914
rodrigos6@juno.com
Old 10-28-2001, 06:28 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
Join Date: Oct 2001
Location: Gautier Ms
Posts: 1,582
Garage
Post

Car came with Bosche platinum. As I have not driven yet they plug the holes fine. Actually just put the Uni-syn on the carbs and was really patting myself on the back for getting thewm so close by ear. Now the engine runs pretty smooth. As soon as my buddy finishes my Air/Fuel ratio meters I will be able to get the jets just right. Carbed 74 2.0 getting better everyday
Old 10-29-2001, 05:14 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Pillow's Avatar
 
Join Date: Jan 2001
Location: Warrenton, Virginia USA
Posts: 803
Post

Bosch or NGK copper core, whichever is fine by me.

I just advise against anything platinum tipped because they can easily foul if you burn oil. Also they do not work well unless you have a really strong spark, better for high RPM applications than idling around town.




------------------
Adrian Pillow
1979 911 SC
1966 VW Microbus
PCA - Peachstate Region
Old 10-30-2001, 11:16 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
HMeeder's Avatar
 
Join Date: Sep 2000
Location: San Diego, CA, USA
Posts: 619
Garage
Anyone else have a thought they'd like to share??
Old 11-01-2001, 10:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
Registered User
 
DSPTurtle's Avatar
 
Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,259
Post

I use the Bosch Plat quad tip is all my cars and have not had a sparkplug related injury to date. Well once when my 944 broke the insulator off of the plug. Replaced it and everything came out okay. Although, I am of the opinion that Rice plugs should go in Rice cars. Maybe I am missing the boat but I sure hope the $5.00 plugs I use are worth the extra bucks over NGK. My 1.8L seems to like Bosch. This will be an interesting post to follow. I wonder what Jake puts in his motors?
Old 11-01-2001, 11:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Stay away from my Member
 
campbellcj's Avatar
 
Join Date: Aug 1999
Location: Agoura, CA
Posts: 5,752
Post

NGK's in both cars; never had any problems.

------------------
Chris C.
73 914 2.0
70 911E Targa
campbell.chris@gte.net
Old 11-01-2001, 12:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Join Date: Jan 2001
Location: KS
Posts: 708
Send a message via AIM to josh912
Post

Bosch Super. Never had a problem with them.

------------------
Joshua Harrison
Porsche owner at heart
Old 11-01-2001, 01:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
roadtrp204's Avatar
 
Join Date: Oct 1999
Location: Boulder City, NV, USA
Posts: 339
Garage
Post

Most of the people I have talked to that use NGK do so for their comprehensive selection of heat ranges. Having had access to books from all the major manufactures I found Bosch to do the same, only problem is most parts stores tend to have a better selection of NGK plugs. Bosch platinums actuall help to stable the idle because less voltage is required for the spark to jump the gap at the needle size electrode. The platinum electrode is also self cleaning at a lower temperature, it one of the properties of platinum. All of the above mentioned plugs have worked well for me in my dual 40IDF 2.0 914. On the other hand I got a set of Bosch platinums for my 97 2.0L VW Golf when I broke a stock Bosch silver and they lasted about 6K miles and the engine developed a bad hesitation, the center platinum electrode was lightly erroded on 3 of them and the forth one was comepletely gone. The only difference is that the Golf uses a high energy ignition system and factory 10:1 compression. I found a shop that had the stock silver plugs and haven't had any problems with them in the last 70K miles, by the way they are about $7 a piece. The only power you might gain out of a set of plugs is the fact that you are replacing worn out ones. Bosch Platinum -4s make me laugh each time I'm at the parts store, do about as much good as a 5 inch exhaust tip! As I recall the original platinums were also $5-$6 when they came out, add three more ground electrodes and bam its worth $6 again.

------------------
Chris
75 914 2.0L
Old 11-01-2001, 07:16 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Administrator
 
Dave at Pelican Parts's Avatar
 
Join Date: Dec 1969
Location: Silly-Con Valley
Posts: 14,064
Garage
Send a message via AIM to Dave at Pelican Parts Send a message via Yahoo to Dave at Pelican Parts
Porsche Crest

There are two different types of Bosch Platinum plugs that I know about. The older style have a lot more platinum in the electrode, and are more expensive. The newer style are the ones that all auto parts stores carry and push on people all the time.

QC on the latter ones has been iffy. There have been a number of cases where the speck of platinum has slid out of the rest of the electrode. In some cases it has closed the point gap completely, while in others it has simply disappeared into the engine. Oops. Also, according to my mechanic they seem to foul more easily on older cars with non-closed-loop fuel systems. (This includes 914s.)

The "+4" plugs are the second (cheap) style with three extra electrodes. I assume, but have not verified for myself, that they have the same kinds of problems as the other cheapie platinums.

I use Bosch Copper plugs. NGKs should be a very acceptible substitute; they are a good quality plug.

--DD

------------------
Pelican Parts 914 Tech Support

A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling
Old 11-04-2001, 02:40 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:01 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.