hmm funky head mod...
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Hmm...very interesting. It's got a bit of a snake oil feel to it because it's so simple, but he's not selling anything, so who knows?
After looking through all his examples, it looks like the basic idea is to cut a groove from the main combustion chamber into the thin "squish" area. On our heads, you'd probably want two grooves - one starting between the exhaust valves, and one starting between the intake valves.
Like this Celica head, which was the only 4 valve example I could find that was similar to our heads: http://somender-singh.com/content/view/42/37/
I wonder though, if a sharp edge on the groove might make for a hot spot in the combustion chamber and make the head less boost-friendly? Maybe if you smoothed out the edges...
After looking through all his examples, it looks like the basic idea is to cut a groove from the main combustion chamber into the thin "squish" area. On our heads, you'd probably want two grooves - one starting between the exhaust valves, and one starting between the intake valves.
Like this Celica head, which was the only 4 valve example I could find that was similar to our heads: http://somender-singh.com/content/view/42/37/
I wonder though, if a sharp edge on the groove might make for a hot spot in the combustion chamber and make the head less boost-friendly? Maybe if you smoothed out the edges...
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but he IS selling, he has patented it so any use of it would have to be purchased (rights) from him.FWombat said:
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I dunno...from what I gather, he'd like to sell his idea to large companies. But he's got a forum going where he actively gives out free advice to folks and laying out his ideas. Usually snake-oil type stuff (like that damn tornado intake thing!) works the opposite way: they try to sell straight to individuals.Import Power said:
From a conceptual level, I can maybe see the grooves helping to create turbulence on the compression stoke, as the squished gasses flow through the channels. Maybe not though; who knows? It's just one of those free simple mods that are always so tempting.
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Interesting.
I like how they tested on an old school engine design to come up with a bigger improvement # afterwards.
"After this simple design change - Obsolete Side Valve engines which feature large quench areas - when fully loaded to the max at 2000 rpms on a dyno have shown a reduction of 42.5 % fuel consumption ( BSFC) and further producing more torque & power at lower operating temperatures in comparison to a stock engine. ( ARAI results)"
Obviously your not gonna se a 42% reduction in fuel consumption if you cut grooves in one of our DOHC mitsu heads.
I like how they tested on an old school engine design to come up with a bigger improvement # afterwards.
"After this simple design change - Obsolete Side Valve engines which feature large quench areas - when fully loaded to the max at 2000 rpms on a dyno have shown a reduction of 42.5 % fuel consumption ( BSFC) and further producing more torque & power at lower operating temperatures in comparison to a stock engine. ( ARAI results)"
Obviously your not gonna se a 42% reduction in fuel consumption if you cut grooves in one of our DOHC mitsu heads.
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Yea, he admits that this works best on older engines with large quench areas (he doesnt have any newer engines to try it on), I have the actual mag. Nice idea, just doesn't have much potential for engines with very small quench areas because the chamber is filled with valve.
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This was my biggest "no" factor: that we don't have much of a quench area in our heads to begin with, and the area we do have is split on opposite sides of the chamber. If these grooves really do what he thinks they do, we wouldn't see nearly the gains that older platforms see.
But...it's essentially a free mod, and any gains at all would be cake as long as there weren't any drawbacks.
But...it's essentially a free mod, and any gains at all would be cake as long as there weren't any drawbacks.
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Sharp edges create hot spots, which lead to detonation.....thats the one drawback I see.
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interesting indeed. yeah our cars don't seem to be a good model for it though. I wonder how much it would lower compression? barely? not at all? or noticable. I'd love to try it.. but not on a 3S
I also wonder if it would give our headgaskets a shorter life under high boost... directing energy outward perhaps?
I also wonder if it would give our headgaskets a shorter life under high boost... directing energy outward perhaps?
i talked to someone about this. they had heared of the idea quite awhile ago, and basicalytold me if you were to run really REALLY crappy gas, it would make a very large difference, buit since the quality of gas is so great in the US, there will be very small benefits to doing this..
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Bringin back a thread from the dead!
Who reads Spanish?
YouTube - Haciendo Sing Grooves a las culatas de un 3000GT VR4
Don't suppose this guy is on 3si?
Max
Who reads Spanish?
YouTube - Haciendo Sing Grooves a las culatas de un 3000GT VR4
Don't suppose this guy is on 3si?
Max
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1,737 Posts
Like blowing out chunks of your block, trasnfer case and bell housing werent enough. This guy wants you to carve grooves into the head, to provide yet another explosion point.
The idea might be great, for n/a vehicles or like a honda or something.
Give him a turbo and see if he can carve grooves in it to spool faster and displace more air. Then I'd jump on the bandwagon.
The idea might be great, for n/a vehicles or like a honda or something.
Give him a turbo and see if he can carve grooves in it to spool faster and displace more air. Then I'd jump on the bandwagon.
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1,737 Posts
Just saw the vid, using a dull saw blade with no handle is probably much more efficient than using a new 2$ blade. I suppose he also bored out his cylinders with sandpaper and welded his center diff with JB Weld. This shows you to never buy a car from another country.
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What if you made the grooves, blended the edges so no sharp spots and coated the combustion chamber and piston? Then you would not have the hot spots on the edges and would still have a channel for gases to follow. Trick flow heads have small diverters in the chambers to promote swirl and I think a stock Mitsu head has a little triangle bump cast into the head as well which probably does something to help combustion. I am just wondering why no head porters do anything like this if this has been known for some time and is beneficial with no down sides?...seems simple enough if it works
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I don't know if that's the same guy, but I know there is someone who was putting grooves similar to that in the head to improve the air/fuel mixture for motorcycles.
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