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Old 08-15-2014, 01:53 AM   #1 (permalink)
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Premium Fuel Hack

For Ecomodder Members

Just transfer an efficiency mod or fabricate your spark plugs or your new platinum plugs to increase fuel savers efficiency. Remember new platinum plugs go 100k miles before having to be inspected in most cars.

Just... If you plan this when you need new plugs you will have to pay for your new plugs and it will seem like you are risking your money but after a year or by your next oil change it won't seem like much. I am having great success with this mod in my Smart car after 1 year. Horsepower was not the goal but I can't really tell just a different feel with premium. It does have the power. But I try to save fuel with each tankful. But I am not doing that great with the bigger cars.


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Old 08-15-2014, 02:39 AM   #2 (permalink)
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Interesting.

I would like to know the thoughts behind this.
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Old 08-15-2014, 12:49 PM   #3 (permalink)
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so... this mod increases effective combustion chamber volume by removing a section of spark plug thread, thereby lowering efficiency by lowering the compression ratio. Also, there is more of a chance of incomplete combustion, due to the odd shape of the cut-out spark plug with respect to the cylinder head.

I think I'll pass.
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Old 08-15-2014, 01:04 PM   #4 (permalink)
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That diagram looks less scientifically correct than my wheel skirt installation, and one of my main tools for the installation was BEER!

Reminds me of the time machine from Napoleon Dynamite "wait, you forgot the crystals"

All fun and games until the rest of the plug breaks off and falls into the cylinder
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Old 08-15-2014, 01:55 PM   #5 (permalink)
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Old 08-15-2014, 02:08 PM   #6 (permalink)
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Quote:
Originally Posted by t vago View Post
so... this mod increases effective combustion chamber volume by removing a section of spark plug thread, thereby lowering efficiency by lowering the compression ratio. Also, there is more of a chance of incomplete combustion, due to the odd shape of the cut-out spark plug with respect to the cylinder head.

I think I'll pass.
I know but I think I should know the difference.

Update: after 15000 miles running regular unleaded. Just ok.

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Old 08-15-2014, 02:19 PM   #7 (permalink)
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A similar plug with a shorter reach might be an easier and safer alternitve to modifying the plug, and it would remove a greater volume(but still probably less than 1cc) The electrode wouldn't be as exposed, the odd shape of the combustion chamber could be an issue as noted by t vago. any way of doing this would leave the threads of the spark plug hole exposed which could cause a hot spot, creating the problem you were tring to avoid
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Old 08-15-2014, 02:21 PM   #8 (permalink)
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Quote:
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Not actually! Premium engines burn the fuel slower during detonation...because you want to avoid predetionation if you ever tried this in an old corvette.. This is just to keep from taking the heads off your engine to put a thicker gasket. The only known other way to prevent predetonation due to high compression. Therby be as exact as you want. Now that is a heads job.
... did you even READ what I wrote? "...this mod increases effective combustion chamber volume by removing a section of spark plug thread, thereby lowering efficiency by lowering the compression ratio..."

BTW, premium fuels do not "burn slower" as such - they are merely more resistant to spontaneous combustion due to elevated pressures/temperatures.
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Old 08-15-2014, 03:11 PM   #9 (permalink)
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I run regular fuel in my premium spec'd car without issue. The car retards the timing a little to compensate for the loss in octane.

I don't see how reducing the compression ratio is more efficient than letting the ECU control the timing advance.
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Old 08-15-2014, 04:18 PM   #10 (permalink)
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Quote:
Originally Posted by t vago View Post
... did you even READ what I wrote? "...this mod increases effective combustion chamber volume by removing a section of spark plug thread, thereby lowering efficiency by lowering the compression ratio..."

BTW, premium fuels do not "burn slower" as such - they are merely more resistant to spontaneous combustion due to elevated pressures/temperatures.
Well here you have it. I am getting remarkable results while driving my car through the Blue Ridge Mountains I have no pinging. It is much cheaper and I won't change my story... Though don't know why... I did. I remember that I ought to at least remember that I did.


Last edited by BikerModder; 08-17-2014 at 01:41 AM.. Reason: typo edit
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