Home  
Site Partners: SpotterGuides Veloce Books  
Related Sites: Your Link Here  

Go Back   TenTenths Motorsport Forum > Racing Talk > Racing Technology

Reply
 
Thread Tools Display Modes
Old 28 Nov 2007, 14:24 (Ref:2077295)   #1
knighty
Veteran
 
knighty's Avatar
 
Join Date: Nov 2005
England
Essex
Posts: 1,406
knighty should be qualifying in the top 5 on the gridknighty should be qualifying in the top 5 on the grid
Grooved cylinder heads

check this link out

http://somender-singh.com/content/view/7/31/

and this one

http://www.gofastnews.com/board/engi...9.html#post552

looks like a nice little cheap tuning modification for 2 valve per cylinder engines
knighty is offline  
Quote
Old 28 Nov 2007, 17:33 (Ref:2077430)   #2
Alex Hodgkinson
Veteran
 
Alex Hodgkinson's Avatar
 
Join Date: Aug 2004
England
Derby
Posts: 1,010
Alex Hodgkinson should be qualifying in the top 10 on the grid
Crikey they look a bit unsitely don't they! Seems like it could be a worker though. Not too sure about it myself. I can think of nicer ways which would have the same effect.
Alex Hodgkinson is offline  
__________________
Keep living the dream!
Quote
Old 28 Nov 2007, 18:59 (Ref:2077484)   #3
GORDON STREETER
Veteran
 
GORDON STREETER's Avatar
 
Join Date: Nov 2006
Spain
Kent+Mojacar Spain, but not always ?
Posts: 9,400
GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!
Looks like one of Zef's modded heads after a night in the pub !
I'd like to see some "real" back to back tests on this one.
GORDON STREETER is offline  
__________________
Balls of steel (knob of butter) They're Asking For Larkins. ( Proper beer) not you're Eurofizz crap. Hace más calor en España. Me han conocido a hablar un montón cojones! Send any cheques and cash to PO box 1 Lagos Nigeria Africa !
Quote
Old 29 Nov 2007, 09:07 (Ref:2077798)   #4
knighty
Veteran
 
knighty's Avatar
 
Join Date: Nov 2005
England
Essex
Posts: 1,406
knighty should be qualifying in the top 5 on the gridknighty should be qualifying in the top 5 on the grid
Quote:
Originally Posted by GORDON STREETER
Looks like one of Zef's modded heads after a night in the pub !
I'd like to see some "real" back to back tests on this one.
you want real back-to-back results, here you go

http://somender-singh.com/content/section/4/37/

scroll down, if the page is blank
knighty is offline  
Quote
Old 29 Nov 2007, 09:50 (Ref:2077830)   #5
Chris Y
Nature's servant
Veteran
 
Chris Y's Avatar
 
Join Date: May 2000
United Kingdom
Over there, over here
Posts: 4,380
Chris Y has a real shot at the championship!Chris Y has a real shot at the championship!Chris Y has a real shot at the championship!Chris Y has a real shot at the championship!Chris Y has a real shot at the championship!Chris Y has a real shot at the championship!
His site doesn't help much. There's a lot of 'seems to do this' and 'we think' that.. Smells a lot like snake oil or tiger repellant

However, it does link in with an idea I had a while back but just don't have the resources to follow up on - tapered squish pads. I thought about tapering the squish areas in towards the valves slightly - thought it may direct more of the mixture towards the plugs under compression, and help spread the flame front a bit wider. I'm probably wrong in several ways
Chris Y is offline  
__________________
This planet is mildly noted for its hoopy casinos.
Quote
Old 29 Nov 2007, 16:10 (Ref:2078008)   #6
knighty
Veteran
 
knighty's Avatar
 
Join Date: Nov 2005
England
Essex
Posts: 1,406
knighty should be qualifying in the top 5 on the gridknighty should be qualifying in the top 5 on the grid
snake oil.......one bloke has tried it on his briggs and stratton lawn mower engine via hacking a groove with a 1/4 inch file, and reported it now uses a 1/4 of the fuel and idles much better ........surely thats a credible enough thread for all us and all big motor manufacturers to jump on board!.........but joking aside, if someone like briggs and stratton said "yep, we''ll have it" you can have 10 cents royalty per engine, he will be a very very rich man........their engine production volumes are well into the millions.

but seriously, I think he has something, it seems to work better on some engines and not so well on others, main benefit is improved idle behaviour and emissions.......with small improvements in mid-range and max power.......I think its best suited to high compression race engines with big piston intruders that mask the other side of the chamber.

it would be interesting to see how it would perform on a highly strung 2-valve motor like a nascar engine........we shall see
knighty is offline  
Quote
Old 29 Nov 2007, 16:43 (Ref:2078036)   #7
AU N EGL
Veteran
 
AU N EGL's Avatar
 
Join Date: Jul 2006
United States
Raleigh, North Carolina
Posts: 4,418
AU N EGL should be qualifying in the top 10 on the gridAU N EGL should be qualifying in the top 10 on the grid
Its a FORD engine . . . They need all the help they can get.



Just Kidding . . . .
AU N EGL is offline  
__________________
"When the fear of death out weighs the thrill of speed, brake." LG
Quote
Old 30 Nov 2007, 23:13 (Ref:2079060)   #8
THR
Veteran
 
Join Date: Jun 1999
United Kingdom
Wolverhampton, England
Posts: 727
THR has a lot of promise if they can keep it on the circuit!
sounds logical really... no proof above tho, its an extra op to machine in an engine, hence costs more to make, hence manufacturers aint done it!
F1 engines must have this sort of technology already, it would be something that they do all the time, esp with the camera in engine video.
THR is offline  
Quote
Old 3 Dec 2007, 01:25 (Ref:2080215)   #9
Notso Swift
Veteran
 
Notso Swift's Avatar
 
Join Date: Apr 2006
United Nations
37deg 46'52.36" S 144deg 59' 01.83"E
Posts: 1,908
Notso Swift should be qualifying in the top 10 on the grid
4 valve motors don't have the same issues with swirl and flame path and all that
Notso Swift is offline  
__________________
Contrary to popular opinion, I do have mechanical sympathy, I always feel sorry for the cars I drive.
Quote
Old 3 Dec 2007, 01:59 (Ref:2080223)   #10
kelvin88
Veteran
 
kelvin88's Avatar
 
Join Date: Oct 2006
United Kingdom
south east
Posts: 943
kelvin88 should be qualifying in the top 10 on the grid
Surely NASCAR teams has tried this already?
kelvin88 is offline  
Quote
Old 3 Dec 2007, 02:09 (Ref:2080230)   #11
gttouring
Veteran
 
gttouring's Avatar
 
Join Date: Jan 2003
Location:
USB 3.0
Posts: 4,536
gttouring should be qualifying in the top 10 on the grid
if this was really this great, pay for the patent use would have been done by any and all manufacturers- it is such a simple idea and easy to do why not..then testing all the shapes of grooves and number of cut..hmm hmm
gttouring is offline  
__________________
SuperTrucks rule- end of story.
Listen to my ramblings! Follow my twitter @davidAET
I am shameless ...
Quote
Old 3 Dec 2007, 09:42 (Ref:2080453)   #12
phoenix
Veteran
 
phoenix's Avatar
 
Join Date: Jul 2005
European Union
Posts: 1,981
phoenix should be qualifying in the top 5 on the gridphoenix should be qualifying in the top 5 on the grid
I can see how it might achieve the claimed results.

With a two valve head and an offset spark plug, squirting a high-speed jet of mixture from the squish area across the chamber directed at the plug could give some improved mixing, increase turbulence and result in a faster flame front. This could lead to a faster and a more complete burn, equalling more power and better economy. Less ignition advance would be required to give the (higher) peak cylinder pressure just after TDC.
phoenix is offline  
Quote
Old 3 Dec 2007, 21:33 (Ref:2080942)   #13
dtype38
Race Official
Veteran
 
dtype38's Avatar
 
Join Date: May 2004
England
East London
Posts: 2,479
dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!
Quote:
Originally Posted by THR
F1 engines must have this sort of technology already, it would be something that they do all the time, esp with the camera in engine video.
I've seen footage of how Ferrari do it... they have a complete cylinder built of clear high pressure crystal and they just watch it with a high speed camera from outside. Nice to have that sort of money eh?
dtype38 is offline  
Quote
Old 10 Dec 2007, 09:55 (Ref:2085374)   #14
zefarelly
Veteran
 
zefarelly's Avatar
 
Join Date: Apr 2002
European Union
Posts: 9,710
zefarelly has a real shot at the podium!zefarelly has a real shot at the podium!zefarelly has a real shot at the podium!zefarelly has a real shot at the podium!
so If I just do chambers with a 4 1/2" cutting disc will I get 120 BHP/litre ?
zefarelly is offline  
Quote
Old 10 Dec 2007, 19:04 (Ref:2085910)   #15
SidewaysFeltham
Racer
 
Join Date: Jun 2007
United Kingdom
UK and France
Posts: 419
SidewaysFeltham should be qualifying in the top 5 on the gridSidewaysFeltham should be qualifying in the top 5 on the gridSidewaysFeltham should be qualifying in the top 5 on the grid

Nope!

With such sharp edges they will start to glow and cause awful pre-ignition!

One of the reasons one tries to arrive at clean and carefully rounded head contours is to avoid precisely that.

The greater the power output: the greater the BMEP: and the higher the operating temperature inside the combustion chamber.

Of course, you could consider changing the FoMoCo mill for a Briggs and Stratton........................................
SidewaysFeltham is offline  
Quote
Old 14 Jan 2009, 20:04 (Ref:2371551)   #16
gttouring
Veteran
 
gttouring's Avatar
 
Join Date: Jan 2003
Location:
USB 3.0
Posts: 4,536
gttouring should be qualifying in the top 10 on the grid
i have read more on this and it seems to effect 2 valves mostly and if that-
very little research is done in the way of single modification and without rounded edges the pre-ignition would be a worry.
neat idea for the emission related rpogress but multivalve engine are the norm more so than nascar and i am sure some one in NASCAR has tried this... at WOT i am guessing this is more of a non issue rather than at idle.
gttouring is offline  
__________________
SuperTrucks rule- end of story.
Listen to my ramblings! Follow my twitter @davidAET
I am shameless ...
Quote
Old 14 Jan 2009, 21:00 (Ref:2371598)   #17
tristancliffe
Veteran
 
tristancliffe's Avatar
 
Join Date: Dec 2005
United Kingdom
Norwich, UK
Posts: 1,164
tristancliffe should be qualifying in the top 10 on the gridtristancliffe should be qualifying in the top 10 on the grid
I don't believe it based on that website. Why believe any website that claims that moving the ignition point closer to TDC by running less advance gives more power, when in fact you want to run more advance to get more power (up to limits of course). And that's just one bit that's utterly wrong.

It might be true. It might work. But they haven't got a clue why, and so I will not take their word.
tristancliffe is offline  
__________________
Dallara F307 Toyota, MSV F3 Cup - Class and Team Champion 2012
Monoposto Champion 2008, 2010 & 2011.
Quote
Old 14 Jan 2009, 22:07 (Ref:2371659)   #18
GORDON STREETER
Veteran
 
GORDON STREETER's Avatar
 
Join Date: Nov 2006
Spain
Kent+Mojacar Spain, but not always ?
Posts: 9,400
GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!GORDON STREETER is going for a new world record!
Being the sceptic that I am I won't believe anything unless it is proved beyond doubt, under controlled conditions !
GORDON STREETER is offline  
__________________
Balls of steel (knob of butter) They're Asking For Larkins. ( Proper beer) not you're Eurofizz crap. Hace más calor en España. Me han conocido a hablar un montón cojones! Send any cheques and cash to PO box 1 Lagos Nigeria Africa !
Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Martin cylinder heads don randel Historic Racing Today 4 30 Oct 2007 10:39
Gas flowing cylinder heads zefarelly Racing Technology 10 6 Feb 2004 11:47
First 4 cylinder to win? pink69 Bike Racing 10 1 May 2002 09:22
Grooved tyres - do they improve safety in F1 or not? R Formula One 5 14 Jan 2001 10:22
Grooved planks Sparky Racing Technology 7 17 May 2000 20:03


All times are GMT. The time now is 06:38.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Original Website Copyright © 1998-2003 Craig Antil. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2004-2021 Royalridge Computing. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2021-2022 Grant MacDonald. All Rights Reserved.