| View previous topic :: View next topic |
| Author |
Message |
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
 Posted: Tue Sep 11, 2007 4:57 am Post subject: wild machine work concept - Singh groove? |
 |
Found this link:
http://somender-singh.com/content/view/97/52/
From mpgresearch.com forums (those guys are insane they have a lot of crazy new ideas)
What are YOUR thoughts on this idea? looks kinda crazy
found a few generic diy-er posts that seem to have good results. Seems to really be all 2 valve 70s engines that are posting their results (which are also good ones)
Before you say if it was good it would be done by manufacturers dont forget to read hes been doing it over 10 years and has a patent.
_________________
 Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
 |
Ihiryu
Encyclopedia-Nissan
Joined: 16 Oct 2005
Posts: 1143
Location: Tx
|
| Posted: Tue Sep 11, 2007 11:09 am Post subject: |
|
i'm sorry, but the way they did that FAQ or whatever was confusing, this has to do with the block and head being o-ringed right?
_________________
Anyone down for some online robotech battles? http://robotechvoxp.freeforums.org/index.php |
|
| Back to top |
|
|
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
| Posted: Tue Sep 11, 2007 11:19 am Post subject: |
|
not at all
This has to do with cutting a specific groove aiming towards the spark plug and the cylinder walls to promote jetting and turbulence increasing power and gas mileage while lowering bsfc. . The more squish area an engine has the more it may benefit. There are people with old 2v v8's claiming a 5mpg 10hp change.
_________________
Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
|
Ihiryu
Encyclopedia-Nissan
Joined: 16 Oct 2005
Posts: 1143
Location: Tx
|
| Posted: Tue Sep 11, 2007 11:29 am Post subject: |
|
Ah, ok my bad, the faq thingy just didn't make sense, there's too many odds and ends to it. This may be better for a V-styled motor, considering that we are I4's I don't think cutting a groove would actually help us, because the plug sits right a top of the cylinder.
but only an assumption.
_________________
Anyone down for some online robotech battles? http://robotechvoxp.freeforums.org/index.php |
|
| Back to top |
|
|
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
| Posted: Tue Sep 11, 2007 11:44 am Post subject: |
|
depends, some engines have better results. I dont think the DE would be a great candidate but the sohc is possibly one...
_________________
Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
|
FandZ
Dreams of owning a 240!
Joined: 26 Aug 2007
Posts: 56
|
| Posted: Tue Sep 11, 2007 1:03 pm Post subject: |
|
I think it has so to do with getting a more complete mixture of gas and air along with having the A/f directed to the spark plug. I don't think it would be as drastic with a Dohc vs sohc but I'm willing to give it a try. I'm going to be running NA till my car is broken in after my rebuild so I'll be able to tell if it makes a difference on gas millage. City driving at least. It makes since and heads are cheap enough so I think I'll try it on my DE.
Any suggestions on where to place the slit? BTW here is a link of a guy in Spain doing to a head. http://www.youtube.com/watch?v=Ss7slCT0Vpw |
|
| Back to top |
|
|
dopeassjackson
Belongs To The TOP CONTRIBUTING MEMBERS!
Joined: 30 Nov 2005
Posts: 2537
Location: hudson valley NY
|
| Posted: Tue Sep 11, 2007 2:04 pm Post subject: |
|
so you hack a slot in between ur valves and its suposto gain you more complete combustion?
_________________
rebuilt KA24E, port and polish, secondaries removed, stage3 clutch, fidanza flywheel, JGS MM, 3inch cat back with high flow cat, cherry bomb vortex muffler, B&M short shifter,ST sways,nismo brase
KA24ET RB20 turbo, 460cc |
|
| Back to top |
|
|
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
| Posted: Tue Sep 11, 2007 2:11 pm Post subject: |
|
thats the gist of it. You aim the slot to the spark plug. Its supposed to make the mixture direct at the plug and direct the combustion at areas that would create turbulance, or areas that normally would have incomplete combustion to improve total burn.
_________________
Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
|
Ihiryu
Encyclopedia-Nissan
Joined: 16 Oct 2005
Posts: 1143
Location: Tx
|
|
| Back to top |
|
|
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
| Posted: Tue Sep 11, 2007 4:34 pm Post subject: |
|
not a clue, its experimental technology at this point. You can do it yourself with a hacksaw blade if you want...
_________________
Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
|
dopeassjackson
Belongs To The TOP CONTRIBUTING MEMBERS!
Joined: 30 Nov 2005
Posts: 2537
Location: hudson valley NY
|
| Posted: Tue Sep 11, 2007 5:35 pm Post subject: |
|
how much does it cost he says. lol they show you how to do it on the video. i wouldnt bother, it may make your head crack and i doubt it actualy works.
_________________
rebuilt KA24E, port and polish, secondaries removed, stage3 clutch, fidanza flywheel, JGS MM, 3inch cat back with high flow cat, cherry bomb vortex muffler, B&M short shifter,ST sways,nismo brase
KA24ET RB20 turbo, 460cc |
|
| Back to top |
|
|
PSi
Knows Some Stuff About 240's!
Joined: 07 Sep 2007
Posts: 244
Location: NC
|
| Posted: Tue Sep 11, 2007 5:55 pm Post subject: |
|
Im a bit sceptic on this idea, Im all for enginuity but i dont really care about the gas milage in my cars made for power....
I dont see how this could in anyway be an advantage to power so im gonna leave it at that...
_________________
Forced industries the home of hybrid performance
1983 280ZXT
1989 240sx KA24DET
1987 RX7 Lima 2.3t (project) |
|
| Back to top |
|
|
FandZ
Dreams of owning a 240!
Joined: 26 Aug 2007
Posts: 56
|
| Posted: Wed Sep 12, 2007 9:47 am Post subject: |
|
Well in a month or 2 I should be able to post some results.  |
|
| Back to top |
|
|
LigouriRd.
Encyclopedia-Nissan
Joined: 19 Oct 2004
Posts: 1051
Location: Edgerton Wi.
|
| Posted: Thu Sep 13, 2007 4:13 am Post subject: |
|
This concept has been around for a little while, I remember reading about it in CAR magazine some years ago. Since this is a turbo forum I would like to note that this modification is only for NA applications. Gooves like this create hot spots in the cylinder which can cause detonation in turbo applications. My $.02
_________________
"There is no such thing as too much boost. You could have too little rod, piston, sleeve, head gasket or timing. But never too much boost."
'91 Nissan 240SX
'96 Nissan 240SX KA-T(<link)
'04 Mazda 6s, 5 door
'85 Honda Nighthawk 450SC |
|
| Back to top |
|
|
tastyratz
Dont Question My Nissan Knowledge
Joined: 27 Sep 2004
Posts: 873
|
| Posted: Thu Sep 13, 2007 4:32 am Post subject: |
|
that much makes me wonder, because a larger benefit is the complete combustion and shorter time for flame propagation resulting in less cylinder heat absorption and the ability to run later timing in higher compression. This ultimately would benefit in gas mileage as well as horsepower simply by just allowing more timing. I haven't found enough examples to be truly convinced enough to try it so far but its intriguing
_________________
Click sig for Tastyratz.com to get my tech articles and car progress updates |
|
| Back to top |
|
|
FandZ
Dreams of owning a 240!
Joined: 26 Aug 2007
Posts: 56
|
| Posted: Thu Sep 13, 2007 1:32 pm Post subject: |
|
| LigouriRd. wrote: | | Gooves like this create hot spots in the cylinder which can cause detonation in turbo applications. My $.02 |
It isn't an issue because of aluminum heads. The heat is transfered far to quickly for there to be any kind of "hot spot" . The only part to be concearned with would be the very tip end of the edge and it shouldn't be left sharp. Nothing more than a little sanding needed. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Timeslips
Register
Profile
Log in to check your private messages
Log in
