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Old 04-08-2019, 10:10 AM   #5
Need For Speed
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Join Date: Feb 2013
Location: Funville
Posts: 2,112
Originally Posted by Racer Boy View Post
Whatever the heat range of your spark plugs, they have no affect on the water temperature of your engine.
Why is the heat range even being mentioned? Both plugs have the same heat range. It's the physical difference in the plugs that I am referring to.

Now, from what I feel, the engine is running smoother. It appears to me that the NKG plugs are doing a better job at igniting the air/fuel mixture and doing it at a more proper time. This is allowing a more complete burn and the timing at which it's doing it at is allowing the more of the combustion to escape the cylinder when the exhaust valve open, which allows more heat to escape the engine.

We are not talking a huge difference here, probably around 4 cooler.

2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |

Last edited by KRAM36; 04-08-2019 at 11:53 AM.
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