hello somender singh uncle. Namaste. I live in America and I read your article in Popular Science. I want to help you achieve the recognition you deserve. I'm going to do a science project for school and compete against other students in the United States. Unfortunately I just read your article couple days back and the project id due by November. Is it possible to carry a "mini experiment?" I can get the materials and tools to perform this experiment but I will need your assistance in learning and performing this experiment. I have a friend who has pretty much built his own car. He and his grandfather took a junkie and restored it. He works part time at a car mechanic store. He will help me perform this experiment. However, I would like to understand your project in more simpler terms? Do you have any guides or internet links which help me understand the combustion chamber. Please reply back as soon as possible.
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Re:science project???
Date: 2005/08/08 23:24
By: Interested
Status:
There is a place in the uS that can cut the grooves for you.
You will need two identical cars or one car that will be tested before and after the new head is placed on the car.
The groove is placed in each cylinder on the head. A small block Chevy should be an easy car engine to modify.
You can also do this with lawnmower engines.
Good Luck
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Re:science project???
Date: 2005/08/30 03:10
By: sharad
Status:
yeah but according to the article, the emissions were worse with new head than stock.
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Re:science project???
Date: 2005/09/13 02:39
By: singh
Status:
Karma: 3
If only 50% of the fuel was used, how could the emissions be worse?
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Emissions…
Date: 2005/09/13 19:17
By: Silverback
Status:
Karma: 0
I missed that in the article, did it list any specifics?
For one thing it’s well known that increased crevice volume (space between the top of the piston ring an the top of the piston), space between the head and block deck surfaces and the gasket bore and even increased quench distances all result in pockets that hold mixture that doesn’t add to the combustion event and basically ends up “emissions.” I wouldn’t be that surprised if either the taller quench distance or the groove “hold” some unburned or partially burned byproducts under some conditions.
It also really depends on the type of emissions. A hotter, more efficient burn tends to increase NOx emissions, an incomplete burn increases HC, and an incomplete burn will increase CO. You can give a pretty good argument for any of these happening.
Also, just because MPG goes up doesn’t mean that emissions go down. Efficiency could be much better with the fuel that is correctly burned covering up the inefficient combustion. Alternatively, a hotter, more efficient burn will greatly increase NOx
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Re:Emissions…
Date: 2005/09/14 23:12
By: Automotivebreath
Status:
Karma: 1
I know very little about emissions, my plugs run clean; my guess is a hotter, more efficient burn with a tendency to increase NOx. The carbon content in my oil is drastically reduced so I don’t believe HC and CO will be a problem.
Don't use the emissions results from a flat head as an indicator of potentials.
Post edited by: automotivebreath, at: 2005/09/14 23:14
Post edited by: automotivebreath, at: 2005/09/14 23:43
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Re:Emissions…
Date: 2005/09/15 14:06
By: Jim Wilson
Status:
So, increased NOx is exactly what is going on. See ARAI report. Is that a huge problem? What about catalytic converters?
Obviously this combustion being more efficient would produce a hotter and faster burn, exposing the cylinder to less heat. I have seen this posted elsewhere too.
What does that mean? Can something be done with the NOx that is of any advantage?
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