| Author |
Message |
Warren E. Smith (Magoo)
| | Posted on Monday, February 26, 2001 - 11:33 pm: | |
Ditto Bob, After installing NGK BPR6EVX Plugs and two high output coils I set the gap at .040 reset the carbs and I couldn't believe the difference in my 79 308 GTS. MAGOO P.S. I don't have black soot in my tailpipes,the plugs are burning redissh brown, and the excessive rich smell is gone. You're right it works. |
Robet Johnson
| | Posted on Friday, February 09, 2001 - 10:35 pm: | |
James,
I have a '79 308 GTB with the Crane XR700 and the matching Crane coils. I set my plugs at .035. Runs great, no fouling or pre-ignition and the plugs read fine (clean and light tan in color). Remenber, the XR3000 set up is a much hotter spark than the XR700. In reality, we are only talking .010 over stock at two or three times the voltage. No worries, set them at .030 or .035 and enjoy!
Robert |
Steve Magnusson (91tr)
| | Posted on Friday, February 09, 2001 - 11:14 am: | |
Per the NGK website, your thinking is not off-base, but they're only recommending a .002"~.005" increase:
http://www.ngksparkplugs.com/techinfo/spark_plugs/faq/faqpregap.asp
also some more stuff from them on this subject at:
http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp
Steve M.
was: '78 308GTS (with Crane XR3000s and using the stock ~.025" plug gap)
is: '91 TR
PS the stock "recommended" plug heat range is cold assuming you're able to drive "as Enzo intended" -- my experience is that realistic US driving can benefit from stepping up at least 1 heat range. For example:
NGK BPR7EVX -- the (later) stock recommendation (I've even seen references to the colder "8s")
NGK BPR6EVX -- probably the most popular choice for "normal" US driving
NGK BPR5EVX -- if you're doing a lot of short, frequent trips and/or have some oil fouling too. |
James
| | Posted on Friday, February 09, 2001 - 10:27 am: | |
Should a person open the plug gap to say .040 if running these hi output coils and electronic ignitions. It seems to me the more gap you have the longer spark and the better burn you will have in the cylinder. The hotter coil you have the wider gap you should be able to have. However, I could be all wet on my thinking. This is on my 78 308 GTS. |
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