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The writing on the wall is getting visible ? ! Or better understood !
Grooved Forever !!!
God help those ............ who ............ ? Realize what is comming !
This is the second individual who has attempted to shed some light on the effects of the Groove using two configurations of a test engine before and after using a Grooved cylinder head.
There are some critical caveats to this test in particular and we think Garrett says it best in his actual report. To wit: (emphasis ours)
"One of the biggest considerations with this testing was to test the idea as completely as possible while keeping within a reasonable budget. In doing so, some components were chosen that would accomplish that task even if there were some drawbacks to using them.
In terms of loading, a water brake would have been a better choice, but the cost of a suitable water brake exceeded the cost of the entire dynamometer as shown in Appendix B. Therefore the hydraulic load cell was determined to be a more cost effective approach.
The main drawback with a hydraulic load cell is that the loading is a function of two items, the restriction valve setting and the temperature of the hydraulic oil. As hydraulic oil becomes hotter, its viscosity decreases and will cause the load cell to load less. Since ambient conditions cannot always be kept the same, keeping the load cell oil temperature constant is very difficult. As we increase the load on the engine and increase the power output of the engine, this power is converted into heat in the oil. The best that can be accomplished is that the oil temperature is left to rise to where it becomes stable (the point where the heat exchanger is removing all excess heat) and then the tests run. During the analysis of the results, one can see this was not always accomplished and in the tests where there was a difference in the oil temperature, we cannot compare torque, power or any numbers based on these between tests as the loading is not exactly the same.
Additionally these tests are only looking at the effect of the added groove. Nothing else has been done to tune the engine in terms of spark timing, fuel mapping or camshaft setup. One of the claims of the groove patent is that it allows a higher compression ratio without exhibiting the effects of higher NOx and detonation that normally becomes an issue. Since the stock and modified heads both have the same combustion chamber volume, the testing did not explore the effects of this either. The bottom line is to start by just looking at the groove and what the effects from it are, without having any other factors come into play."
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Comments
Result Written by herning on 2008-01-06 15:32:08Hi, the tests were done with only a groove added. No increase in compression or any other changes. Idle had lower EGT and pollution numbers on the grooved head. On moderate loads, EGT was always lower, HC were generally lower, NOx was higher except for moderate RPM were it was lower. CO was lower except for moderate RPM where it was higher. At high loads, EGT was again always lower, HC was generally lower, Nox was lower until you got to moderate to high rpm, then it was higher and CO was generally higher. Combustion signature plots were also done using ionization current across the spark plug, the grooved heads plots showed characteristics of what you would normally see when buring a higher octane fuel. The fuel used for all tests was standard 87 octane Citgo gasoline. If you click on the link to the above page you should be abel to download PDF files of both tests as well as see pictures of the test setup. Thanks, Garrett Herning
well??? Written by lavaman on 2007-12-11 11:22:20since I can't get the article to open what was your observation? Did it work? I know it worked on my Toyota 22re engine and since the one you have pictured seems to be a geo 3 cyl. I'm really curious as that is the same engine I'm putting in my homebuilt airplane. I hope to hear from you thanks gene
Testing Results 
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