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Re:Groove shape
Date: 2006/07/14 22:58
By: mpgmike
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Karma: 4
What is "GEET"? A fancy exhaust pipe. Do a search. Technology had merit, but the "inventor" didn't.
I finally got a head in with the right combustion chamber to try an idea I've been floating for awhile. 2000 Ford Ranger 2.5 liter with the twin spark plug head. Treat it like 2 individual combustion chambers, shoot for a double helical swirl, and... (details coming in about a week).
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Re:Groove shape
Date: 2006/07/20 06:18
By: finetuning
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Karma: 0
Hi all,
I made grooves in my 95 suzuki esteem 1.3 ltr....its running with lpg....I made grooves with 10cm triangular file...it were straight...pointing towards plug areas....only 3mm thick & 2 mm deep....they looks like sharp pointed knife on squish area.....only 1 groove per cylinder....
I m getting tremendous benefits.....very good initial as well as high end torque....car runs much smoother....emission so cool now...engine temparature reduced by 20% almost....also very good FE i m getting....on my full tank of LPG gas of 45liter...I got 650Km ...thats excellent FE considering I drove in city traffic.....
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Re:Groove shape
Date: 2006/07/20 10:20
By: saskwatch
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Karma: 0
By my calculations that works out to approx. 14.4 Litres per km or 41 miles per imperial gallon (34.13 miles per U.S. gallon). What was your typical fuel economy before the modification?
By LPG do you mean propane or natural gas?
-Ernest
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Re:Groove shape
Date: 2006/07/20 12:18
By: automotive breath
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Karma: 3
saskwatch wrote: By LPG do you mean propane or natural gas?-Ernest
Ernest, I’m just learning about Propane; from what I understand Propane is called LPG in other countries because of the high levels of butane and other gasses in the mixture. In the US its fairly pure propane.
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My earlier FE was 450km per full tank of 45liter means 10 KMPL.....
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Re:Groove shape
Date: 2006/07/21 11:08
By: saskwatch
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Karma: 0
That's a substantial improvement -- an increase by 44% of the old fuel economy. Or to look at from the flip side, the old FE is just over 69% of the current fuel economy.
None of us want to do the extra teardown and reassembly, but to really test the concept out correctly, one should, a)plane the head first, test it without the grooves; then groove the head and re-test;
b)Groove the head before planing; test; then plane the head and re-groove and re-test.
Have any forum participants tested it "before" and "after" in this fashion and care to describe the outcome?
-Ernest
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Re:Groove shape
Date: 2006/07/28 14:49
By: mpgmike
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Karma: 4
mpgmike wrote: What is "GEET"? A fancy exhaust pipe. Do a search. Technology had merit, but the "inventor" didn't.
I finally got a head in with the right combustion chamber to try an idea I've been floating for awhile. 2000 Ford Ranger 2.5 liter with the twin spark plug head. Treat it like 2 individual combustion chambers, shoot for a double helical swirl, and... (details coming in about a week).
Mike I got it back together. Unfortunately, I didn't get to drive it before tearing it apart. It doesn't have much power, but I was told it was a slug before. Tip-in power is reasonable, but the WOT is not what I expected. Should have mileage numbers soon. I was told he was getting 22 mpg average around his home in Mass.
Mike
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Re:Groove shape
Date: 2006/08/10 14:43
By: mpgmike
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Karma: 4
I had my brother drive the Ranger on a 200+ mile round trip to the Pic-N-Pull just to be fair. He drove 75 mph out and 65 mph back. I then drove it for another 80 or so miles. When I filled up it was 25.7 mpg, which seems a tad better. Will be driving it back to its owner in Mass. today and will have more mileage numbers then.
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Re:Groove shape
Date: 2006/08/12 05:37
By: John W. Kelly
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Karma: 0
Well I guess my VW head test has come to an end...at least on this car. The guy got a DWI and his car has been impounded. Time to groove another set.
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Re:Groove shape
Date: 2006/08/14 08:14
By: mpgmike
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Karma: 4
John W. Kelly wrote: Well I guess my VW head test has come to an end...at least on this car. The guy got a DWI and his car has been impounded. Time to groove another set. Sorry to hear that, man. Why not your driver?
mpgmike wrote: Should have mileage numbers soon. I was told he was getting 22 mpg average around his home in Mass. Running 65 average with a 5 kW generator, an 18.5 HP Briggs V-Twin engine, and a full sized truck tool box strapped in sideways I got 27.36 mpg. A marked improvement.
Mike
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Re:Groove shape
Date: 2006/08/20 10:46
By: mpgmike
Status:
Karma: 4
My friend with the Ford Ranger discovered that he had a bad MAF sensor. He told me over the phone that the power is WAY up now that the MAF is fixed. Hope to have new mileage numbers in the next couple of days.
Mike
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Re:Groove shape
Date: 2006/11/18 16:15
By: John W. Kelly
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Karma: 0
mpgmike wrote: John W. Kelly wrote: Well I guess my VW head test has come to an end...at least on this car. The guy got a DWI and his car has been impounded. Time to groove another set. Sorry to hear that, man. Why not your driver?
The heads on my driver have a modification called the "semi hemi cut". This basically removes the squish pads to lower compression. I know this sounds backwards but it does work on some air cooled Volkswagens with low volumetric efficiency. So I have no pads to groove on this one.
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