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4BOYZDOT
03-12-2009, 02:45 PM
anyone out there know the recommended spark plug and gap when using MSD ignition with DART angle plug head ?? brand and part # ?? thanks !!
DOCCALLAHAN
03-13-2009, 06:50 AM
i use ngk plugs r5674-6 and gap them at 35 to 40
shawburn
03-13-2009, 06:58 AM
I asked the same question last year, but on 4M.net."Perfconn" which is The Performance Connection, an engine builder in Knoxville TN. helps out alot of racers on that site with engine questions. He recommended NGK R5673-8 gapped at .040" for use with Dart heads and MSD ignition. That is what I ran last season and had no complaints. Hope this helps.
4BOYZDOT
03-13-2009, 07:16 AM
OK thanks , do you know if this plug has the short threaded area or the longer type? (going into the head)
DOCCALLAHAN
03-13-2009, 11:30 AM
the ones i told ya are a long thread but it doesnt come inside the head too far ive been using these for 2 yrs so far
4BOYZDOT
03-13-2009, 02:24 PM
the ones i told ya are a long thread but it doesnt come inside the head too far ive been using these for 2 yrs so far

OK thanks doc !!
bleweyez19
03-13-2009, 02:34 PM
What if you're runnin alcohol?
DOCCALLAHAN
03-13-2009, 04:43 PM
running alcohol would require a cooler plug number and im not sure on the gap but should be pretty close
4BOYZDOT
03-13-2009, 06:59 PM
OK guys I found a DART website that had a customer service page with most asked questions. one of the most asked questions was what spark plug do I run in my DART angle plug heads. Answer did not give a brand but said to use any plug with 3/4" reach and heat range would depend on your application.
4BOYZDOT
03-15-2009, 07:28 PM
OK guys I found a DART website that had a customer service page with most asked questions. one of the most asked questions was what spark plug do I run in my DART angle plug heads. Answer did not give a brand but said to use any plug with 3/4" reach and heat range would depend on your application.

I have since found conflicting information about this on the same website.
Demon_Doctor
04-28-2009, 06:40 PM
Autolite - racing plugs

Usually it works out to be a AR 13, for gasoline in a Chevrolet engine with 5/8 plug.
http://www.autolite.com/pdf/RacingCrossRef.pdf
http://www.autolite.com/pdf/UnderstandingHeatRange.pdf

http://www.autolite.com/pdf/Autolite_HP_Apps.pdf