Tham Posted May 17, 2006 Report Share Posted May 17, 2006 Since converting to full electronic ignition after the installation of an electronic distributor, I note that the engine runs somewhat hotter than before. I am using standard "hot" plugs, such as Bosch W8DC, Nippondenso W16EX-U or NGK BP5ES. I wonder if switching to "cold" plugs, such as Bosch W7DC, Nippondenso W20EX-U or NGK BP6ES, might lower operating temperature ? Link to comment Share on other sites More sharing options...
Rolla__Boy Posted May 17, 2006 Report Share Posted May 17, 2006 I never noticed any difference when I changed to elec dizzy. Maybe something else has caused it and it's a coincidence that it happened to be around the time u put the elec dizzy in? Link to comment Share on other sites More sharing options...
Felix Posted May 18, 2006 Report Share Posted May 18, 2006 the timing curve in the dizzy is most likely different. Link to comment Share on other sites More sharing options...
thomo Posted May 20, 2006 Report Share Posted May 20, 2006 and no, running a colder plug wont make a difference, it will oil or carbon up faster, likewise a hotter plug will last longer in an oil burner, but makes no real difference to fuel and definatly no difference to timing or temp Link to comment Share on other sites More sharing options...
Tham Posted May 21, 2006 Author Report Share Posted May 21, 2006 Thanks for the info. I think the engine runs hotter possibly because the electronic ignitor tends to fire a hotter spark ? Link to comment Share on other sites More sharing options...
Corolla_Kid Posted May 23, 2006 Report Share Posted May 23, 2006 I'm pretty sure the temperature of the spark has no direct correlation with the operating temperature of the engine. Correct me if I'm wrong. Link to comment Share on other sites More sharing options...
Xany Posted May 23, 2006 Report Share Posted May 23, 2006 (edited) I'm pretty sure the temperature of the spark has no direct correlation with the operating temperature of the engine. Correct me if I'm wrong. yes.....correct. :lmao: I'd say its just a coincidence that it is running a little hotter than normal......definately check timing.... Edited May 23, 2006 by Xany Link to comment Share on other sites More sharing options...
Trev Posted May 23, 2006 Report Share Posted May 23, 2006 It does and it doesnt, all depend how you have the car in tune. Link to comment Share on other sites More sharing options...
Trev Posted May 23, 2006 Report Share Posted May 23, 2006 (edited) Taken from NGK's Technical information section. NGK's Technical Information Heat Range With modified engines (those engines that have increased their compression) more heat is a by-product of the added power that normally comes with increased compression. In short, select one heat range colder for every 75-100 hp you add, or when you significantly raise compression. Also remember to retard the timing a little and to increase fuel enrichment and octane. These tips are critical when adding forced induction (turbos, superchargers or nitrous kits), and failure to address ALL of these areas will virtually guarantee engine damage. An engine that has poor oil control can sometimes mask the symptom temporarily by running a slightly hotter spark plug. While this is a "Band-Aid" approach, it is one of the only examples of when and why one would select a hotter spark plug. "© 2005 NGK Spark Plugs Pty Ltd | site by Echo Reality " Edited May 23, 2006 by Trev Link to comment Share on other sites More sharing options...
Redwarf Posted May 23, 2006 Report Share Posted May 23, 2006 To save copyright infringement, could you please reference where you lift information wholesale from, or please link to it. R Link to comment Share on other sites More sharing options...
Tiger Posted May 23, 2006 Report Share Posted May 23, 2006 OK.... I'm putting this one on ice! Link to comment Share on other sites More sharing options...
Tham Posted May 23, 2006 Author Report Share Posted May 23, 2006 Sorry about that NGK copyright infringment misunderstanding in my earlier post under "Cold Plugs". I didn't mean to cause that argument between Trev and Redwarf with my post. Thanks for the info, Trev, it was quite informative. Hardly any mechanic in Malaysia bothers to tighten spark plugs with a torque wrench (hardly any has one, for that matter). That's something important I noted years ago. Link to comment Share on other sites More sharing options...
Tiger Posted May 23, 2006 Report Share Posted May 23, 2006 Thank you for showing concern. There really wasn't a need to apologise though.. these things do happen occasionally on forums so it's just something that needs time to time reminding. No harm meant at all and we thank all for understanding the seriousness of this. Now... to all members.. PLEASE take note next time you make any form of referrals from other sites, that you clealy mark where you sourced the acquired information from and/or provide a link. Thank you :lmao: Link to comment Share on other sites More sharing options...
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