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#1
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spark plug heat range advice
Interested to know what heat grade plug is recommended for a meth injection setup, im currently running a 8 grade instead of a standard 6 grade and my plugs elctrodes are very clean and slightly white whilst the rest has a sooty coating.
Im aware allot can affect spark plugs but am keen to find out if others run standard heat grade plugs or colder ones like me |
#2
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Re: spark plug heat range advice
Here's a pic off my plug
Engine is a highly modified 2 litre turbo running 60/40 water meth mix at approx 15% to fuel, 23 psi boost, stand alone ecu mapped for meth etc.... |
#3
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Re: spark plug heat range advice
I have a toyota yaris engine converted to turbo with 8.5 compression instead of 10.5. Running 18psi on a gt2560r turbo. Stock aspirated plugs are heat ranged 5. I used stock plugs for a year and worked fine. Now I am on heatrange 6 for safety.
Yours seems iridium and seem rich. I use standard plugs |
#4
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Re: spark plug heat range advice
Id not thought about the tip material, is iridium not suitable for contact with methanol?
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#5
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Re: spark plug heat range advice
Mainly due to cost. I do not saw difference between stock vs iridium. Some claim that iridiums tend to blow the spark by boost
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#6
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Re: spark plug heat range advice
So to sum up, the fact that water meth is in cylinders cooling the charge doesnt affect the heat grade of a spark plug by cooling the plug directly?
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#7
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Re: spark plug heat range advice
Quote:
So when cooling the charge by means of extra fuel or water the plugs result cooler. Too much cool charge and you foul the plug ! |
#8
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Re: spark plug heat range advice
It would not be exposed for a long time compared to total running time without water/meth injection.
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