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09-03-2008, 03:11 PM
| #1 (permalink) |
| 1st Gear Member Join Date: Nov 2005 Location: Texas
Posts: 243
| spark plug for R head what plug is everyone using in their r heads. we have a 150 and 165 |
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09-03-2008, 03:35 PM
| #2 (permalink) |
| 3rd Gear Member  Join Date: Dec 2005 Location: Just south of hell, FL
Posts: 4,594
| Re: spark plug for R head I believe they use stock plugs... cr6hs I think. One step cooler wouldnt hurt (cr7hs) |
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09-03-2008, 03:49 PM
| #3 (permalink) |
| 3rd Gear Member  Join Date: May 2005 Location: michigan
Posts: 1,533
| Re: spark plug for R head cr8hsa is what we run on anything bigger than stock. |
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09-03-2008, 04:03 PM
| #4 (permalink) |
| 3rd Gear Member  Join Date: Mar 2004 Location: CT
Posts: 2,100
| Re: spark plug for R head what is the point of running a cooler spark. I've never had anyone explain that. |
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09-03-2008, 04:03 PM
| #5 (permalink) |
| 2nd Gear Member Join Date: Jun 2008 Location: new york
Posts: 377
| Re: spark plug for R head yes i run a cr8hsa in my+r |
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09-03-2008, 07:20 PM
| #6 (permalink) | |
| 3rd Gear Member Join Date: Dec 2005 Location: Just south of hell, FL
Posts: 4,594
| Re: spark plug for R head Quote:
A cooler plug makes for less of a chance for pre-ignition (yes, not detonation)! actually, just found a great write up on NGK's site... Tech Info - Spark Plugs Overview For the people who think cooler is better... go get you a surface gap plug! | |
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09-03-2008, 07:50 PM
| #7 (permalink) |
| 1st Gear Member Join Date: Nov 2005 Location: Texas
Posts: 243
| Re: spark plug for R head [quote=xr1million;989072] So is it safe to run a 6 in a 150+R ? |
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09-03-2008, 07:58 PM
| #8 (permalink) | |
| 2nd Gear Member  Join Date: Sep 2006 Location: Hudson, NH
Posts: 640
| Re: spark plug for R head [quote=MX81;989118] Quote:
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09-03-2008, 08:10 PM
| #9 (permalink) | |
| 3rd Gear Member Join Date: Dec 2005 Location: Just south of hell, FL
Posts: 4,594
| Re: spark plug for R head [quote=MX81;989118] Quote:
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09-03-2008, 08:21 PM
| #10 (permalink) |
| PM Newbie  Join Date: May 2008 Location: Marshallville,OH
Posts: 41
| Re: spark plug for R head I have always ran an 8 in my +R with no problems |
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09-04-2008, 07:47 AM
| #11 (permalink) |
| 3rd Gear Member  Join Date: Jan 2004 Location: Kissimmee,FL
Posts: 5,717
| Re: spark plug for R head I have a 6 in my 172+R |
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09-04-2008, 08:53 AM
| #12 (permalink) |
| 3rd Gear Member  Join Date: Jan 2007 Location: punxsutawney PA.
Posts: 1,292
| Re: spark plug for R head i run a 6 in my 150 R |
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09-04-2008, 12:08 PM
| #13 (permalink) |
| 2nd Gear Member Join Date: Sep 2007 Location: so cal
Posts: 310
| Re: spark plug for R head [quote=xr1million;989072]most people dont know why, they think it makes the motor run cooler! But it doesnt!!!!! It all has to do with heat dissipation from the core (the white ceramic part around the electrode) to the plug case (the metal threads). The lower the number, the deeper the core goes into the casing before connecting with it (hints less heat dissipation). the higher the number the more the core is in contact. The difference between a 6 a 7 and an 8 isnt (usually) noticeable by eye. A cooler plug makes for less of a chance for pre-ignition (yes, not detonation)! actually, just found a great write up on NGK's site... Tech Info - Spark Plugs Overview 100% TRUE. IVE ALWAYS RAN A 8 WITH A BBK ON MY 50 & 110 |
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