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Old 08-21-2005, 05:47 PM   #1
dgaseven
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Default Update: Mr. Singh's Innovations in Engine Technology

Last year I read/posted a very interesting article from Popular Science about
Mr. Singh's grooved cylinder heads which resulted in cleaner/cooler engine
operation. He now has a website for anyone interested in this little techique.


http://somender-singh.com/



Without grooves, the combustion is incomplete and
unburned fuel remains in the cylinder. This unburned
fuel is still expanding during the exhaust stroke. At
the end of the exhaust stroke, the expanding unburned
gases flow past the intake valve into the intake manifold,
causing poor idle.




With the grooved cylinder heads, combustion is
more complete leaving little unburned fuel behind,
more of the fuel is used to generate power and less
is used to generate heat. (Thatís also why the engines run cooler)

With the modified heads little or no unburned fuel
remains during the exhaust stroke. With less unburned
fuel to expand during the overlap period, the gasses
flowing past the intake valve are reduced, resulting
in improved idle quality.




This image depicts the flame front (dotted line)
and a gas jet created by the groove (yellow arrow)

What is more difficult to show is the multi-point
flame front and increased turbulence within the
cylinder leading to more efficient combustion.
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Old 08-21-2005, 05:51 PM   #2
whoosh
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try it on your car and let us know how it works.


so it's like breaking a wave and mixing it back up?
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Old 08-21-2005, 07:05 PM   #3
Bill The Butcher
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Old 08-21-2005, 07:09 PM   #4
whoosh
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if the car burns almost all hydrocarbons then the exhaust would be cleaner.

if it's cleaner then you wouldn't need cats.

no cats= mo' power.

so. if you did this to subie heads could you pass emissions with no cats?
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Old 08-21-2005, 07:29 PM   #5
Hazdaz
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How is this idea that much different than the HEMI engine, and it using a hemispherical combustion chamber?

I mean I realize that one involves grooves and the other reshaping of the chamber itself, but the ideas are sort of similiar, yet seems that everyone is quick to discredit Singh's idea because it is "too simple".

Maybe I don't know enough about engine internals (and I will be the first to say that I am not a 'greese monkey'), but Singh's idea sounds quite interesting. Seems to me that some of the best ideas are very simple and make people go "why didn't I think of that".
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Old 08-21-2005, 08:12 PM   #6
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I enjoyed reading the article. I hope one of the tuners here tries it and reports.

thanx for the link

Carl
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Old 08-21-2005, 08:22 PM   #7
whoosh
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i see the connection...pulsating TITTIES!

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Old 08-21-2005, 08:35 PM   #8
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25071
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Old 08-21-2005, 09:27 PM   #9
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He needs to build a prototype. Something simple. Maybe a motorcycle that can get 200 miles/gallon. Then he can show the world, that he is right.
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Old 08-21-2005, 09:39 PM   #10
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I hear the tornado works too!
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Old 08-21-2005, 09:42 PM   #11
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Quote:
Originally Posted by DoctorNick
I hear the tornado works too!
Supercharge any car: 49.95! 40 hp on stock cars! Increased gas mileage! Cures cancer and AIDS!
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Old 08-21-2005, 09:42 PM   #12
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Maybe he needs to test it on a modern engine that already has pretty efficient combustion. The fact that he can make anitquated carbureted motors more efficient with his method doesn't have much relevance to modern fuel injected motors. With a motor running in closed-loop mode maintaining 14.7:1 stoichiometric A/F ratio, there isn't a lot (if any) extra gas leftover when the combustion cycle is done, so what difference are his grooves going to make?
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Old 08-21-2005, 09:43 PM   #13
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Never had a condom with grooves? it just feels better!
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Old 08-21-2005, 09:51 PM   #14
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Quote:
Originally Posted by DoctorNick
Never had a condom with grooves? it just feels better!
Do you wear the grooves on the inside or outside?
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Old 08-21-2005, 09:52 PM   #15
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Don't ask me, I don't wear condoms when I'm banging my woman
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Old 08-21-2005, 10:51 PM   #16
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Quote:
Originally Posted by DoctorNick
I hear the tornado works too!
Vortex Valve OWNZ. Especially after both of their Pikes Peak cars failed to finish.
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Old 08-21-2005, 11:11 PM   #17
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i would be worried about those ridges causing detonation due to the heat and introduction of new fuel and air on intake..

IE

those ridges are going to be marginaly hotter then the valleys after the exhaust stroke.

meaning on the compression stroke you might get some detonation as the fuel hits those hotter regions of the chamber..


just some thoughts.. prob why dude goes with larger "ridges" then smaller ones.. would make a huge difference on a FI setup i would assume.
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Old 08-22-2005, 12:12 AM   #18
dgaseven
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Old 08-22-2005, 12:23 AM   #19
dgaseven
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Quote:
Originally Posted by Chuck H
Maybe he needs to test it on a modern engine that already has pretty efficient combustion. The fact that he can make anitquated carbureted motors more efficient with his method doesn't have much relevance to modern fuel injected motors. With a motor running in closed-loop mode maintaining 14.7:1 stoichiometric A/F ratio, there isn't a lot (if any) extra gas leftover when the combustion cycle is done, so what difference are his grooves going to make?

here's my take on that situation... What companies have spent millions of
dollars on research to achieve, Singh has matched with a few grooves inside
a cylinder head.
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Old 08-22-2005, 04:13 AM   #20
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Quote:
Originally Posted by dgaseven
here's my take on that situation... What companies have spent millions of
dollars on research to achieve, Singh has matched with a few grooves inside
a cylinder head.
How many of them have tried something as wacky as cutting grooves into the head?
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Old 08-22-2005, 04:23 AM   #21
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Quote:
Originally Posted by skywatchersti
Supercharge any car: 49.95! 40 hp on stock cars! Increased gas mileage! Cures cancer and AIDS!
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Old 08-22-2005, 04:32 AM   #22
Davidss
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I tried his idea twice.

Once on a 5hp go cart and it worked... It was almost night and day. It was quieter, the exaust was cooler, and it had more low end torque!

Then we tried it on a 89 240sx. The results were unconclusive. Sometimes it seemed more powerfull and sometimes it seemed slower. I think part of the problem was that it needed a standalone to nail down the timing...
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Old 08-22-2005, 09:24 AM   #23
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Someone introduce Mr. Singh to Larry Windmer. Larry's "Roller Wave" pistons, his "soft head" configurations, and these head notches may be a good match.

Ditto on the concerns about the edges of the grooves causing hot-spotting in the head though.

[edit]Okay, I read TFA and looked at the pictures. No more hotspotting concerns, this looks quite interesting. I wonder if the decreased temps can be attributed partially to the increased combustion chamber volume the groove creates?[/edit]

Last edited by Chromer; 08-22-2005 at 09:33 AM.
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Old 08-22-2005, 09:34 AM   #24
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If it worked, then the major manufacturers would already have in in their cars. You know, since they are always looking out for the best interests of their customers and all.
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Old 08-22-2005, 10:08 AM   #25
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Yeah, our best interest, that's what they're always looking out for.
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