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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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 Posted: Sat Aug 01, 2015 2:06 am Post subject: My spark plugs are pink!! |
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Ha, I've never seen that before..
I did a bunch of frantic searching and it turns out that a light pink hue on spark plugs is most likely from additives in octane boosters (techron?) and additives in gasoline.. Surprise surprise..
I'm running BP invigorate premium.. I'm guessing it's from the gas and I've never seen it before because I've never run premium in any car before, I have in a 15k rpm 10.5:1 comp 2 stroke I built but that's about it..
Plugs look awesome other than pink on the insulator, no dents dings chips or anything from detonation and no deposits really, little medium tan on the electrode ground part that the spark hits. No deposits tells me I can go colder..
The plugs are BPR7ES NGK and I am replacing them with colder BP8ES without a resistor.. I do not want a radio in the Porsche and no resistor should give me a bit hotter spark..
Or should I go even colder at BP9ES? I do not mind a shorter maintenance interval (fouling faster) in trade off for more engine safety.. What do you think?
Recommendations pros/cons for gapping?
On another note I'm sick of having to blow out and clean my spark plug holes before removing my plugs, they are always full of crap down in there and I don't want that in my cylinders..
Is there any trick to doing this or keeping this from happening? It seems especially problematic on this car in particular..
_________________
80 Turbo - Slightly Modified
Last edited by Fasteddie313 on Sat Aug 01, 2015 9:08 am; edited 1 time in total |
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jason c
Joined: 13 Jan 2014
Posts: 1018
Location: Nwi
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| Posted: Sat Aug 01, 2015 7:34 am Post subject: Re: My spark plugs are pink!! |
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| Fasteddie313 wrote: | Ha, I've never seen that before..
I did a bunch of frantic searching and it turns out that a light pink hue on spark plugs is most likely from additives in octane boosters (techtron?) and additives in gasoline.. Surprise surprise..
I'm running BP invigorate premium.. I'm guessing it's from the gas and I've never seen it before because I've never run premium in any car before, I have in a 15k rpm 10.5:1 comp 2 stroke I built but that's about it..
Plugs look awesome other than pink on the insulator, no dents dings chips or anything from detonation and no deposits really, little medium tan on the electrode ground part that the spark hits. No deposits tells me I can go colder..
The plugs are BPR7ES NGK and I am replacing them with colder BP8ES without a resistor.. I do not want a radio in the Porsche and no resistor should give me a bit hotter spark..
Or should I go even colder at BP9ES? I do not mind a shorter maintenance interval (fouling faster) in trade off for more engine safety.. What do you think?
Recommendations pros/cons for gapping?
On another note I'm sick of having to blow out and clean my spark plug holes before removing my plugs, they are always full of crap down in there and I don't want that in my cylinders..
Is there any trick to doing this or keeping this from happening? It seems especially problematic on this car in particular.. |
The color is from additives, either in the fuel or octane booster (if you're using it). The color may change with the seasons due to changes in summer & winter blends.
If you're going to use the visual look of the plugs as a tuning tool, you should run the car under full throttle & boost, shut it down and then check the plugs. I know its not a popular thing to do to a turbo, but running at idle after runs can affect the appearance.
That's partly why they have AFR gauges now.
How are you looking at the plugs? You should me using a magnifying glass, some of the deposits, possibly small round balls of spatter, will be difficult to see with the naked eye.
I had a problem running non resistor plugs on my 951, it didn't run like it should even though it felt OK at Lower speed, it was down on power and I couldn't get the car over 100mph with them. The 951 has motronic but the coils are similar. I'm not sure if non resistor plugs will have an affect on the 931, I don't remember ever trying it, it may depend on the wires you run as well.
Some plug wires have dust covers to keep the holes clean, the hood insulation is usually a good contributor to the crap under the hood.
You should go as cold as possible as long as the plugs don't foul out, once they do, they won't work as well no matter how good you clean them. |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Sat Aug 01, 2015 9:02 am Post subject: Re: My spark plugs are pink!! |
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| jason c wrote: |
The color is from additives, either in the fuel or octane booster (if you're using it). The color may change with the seasons due to changes in summer & winter blends.
No boosters used..
If you're going to use the visual look of the plugs as a tuning tool, you should run the car under full throttle & boost, shut it down and then check the plugs. I know its not a popular thing to do to a turbo, but running at idle after runs can affect the appearance.
That's partly why they have AFR gauges now.
I hope to have one soon.
How are you looking at the plugs? You should me using a magnifying glass, some of the deposits, possibly small round balls of spatter, will be difficult to see with the naked eye.
Naked eye only then into the parts washer and blown out.. I'll remember that next time
I had a problem running non resistor plugs on my 951, it didn't run like it should even though it felt OK at Lower speed, it was down on power and I couldn't get the car over 100mph with them. The 951 has motronic but the coils are similar. I'm not sure if non resistor plugs will have an affect on the 931, I don't remember ever trying it, it may depend on the wires you run as well.
Some plug wires have dust covers to keep the holes clean, the hood insulation is usually a good contributor to the crap under the hood.
My plug wires have the metal shields around the plugs, they look like the upgrade ones that used to be on ideola's garage but I forget the brand name..
You should go as cold as possible as long as the plugs don't foul out, once they do, they won't work as well no matter how good you clean them.
Great, I'll go NGK 9s and see what happens, copper plugs.. |
Thank you jason..
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80 Turbo - Slightly Modified |
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jason c
Joined: 13 Jan 2014
Posts: 1018
Location: Nwi
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| Posted: Sat Aug 01, 2015 10:03 am Post subject: |
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Ok. No problem.
Keep in mind washing plugs in solvent or anything really, isn't good for them. We use to use a small sandblaster to clean them, you can also use a wire brush, just keep solvent off them. |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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