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09-21-2009, 10:38 AM
| #1 (permalink) |
| 2nd Gear Member Join Date: Nov 2005
Posts: 476
| Heat range for spark plugs in big bore engines??
Hey guys I run a 8 heat range in my takegawa 124 engines but I wasnt sure about these big engines (177cc and up). Do you guys run a 7 or an 8.. It is going to be used for road racing if that makes any difference..
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09-21-2009, 05:59 PM
| #2 (permalink) |
| Super Moderator Join Date: Feb 2005 Location: Windham, ME
Posts: 8,301
| Re: Heat range for spark plugs in big bore engines??
I've been running 8's, sometimes 9's? I haven't run anything larger than a 151cc mill though.
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09-21-2009, 07:17 PM
| #3 (permalink) |
| 1st Gear Member  Join Date: Jul 2009 Location: edmonton alberta canada
Posts: 170
My Mood:  | Re: Heat range for spark plugs in big bore engines??
im running a 7 maybe ill try an 8 tomo and see wat difference it makes. do the bigger bores need this?
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09-22-2009, 07:47 AM
| #4 (permalink) |
| 2nd Gear Member Join Date: Nov 2005
Posts: 476
| Re: Heat range for spark plugs in big bore engines??
The bigger the # the cooler the plug runs... So you are helping it stay a little cooler with the higher #plug is all.. You wouldnt notice a difference in performance just being a little easier on the engine is all.. And here in NC its in the 90s most of the summer...  |
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