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2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
7th Apr, 2009 at 02:16:19pm
Yamaha have revived the use of the cross plane crank in this year's R1 it basicaly gives an inline 4 the power delivery characteristic of a V twin. Could t his principle be of benifit in a car engine? Own the day
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Site Admin  9407 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
7th Apr, 2009 at 02:41:54pm
is this like a big bang engine? On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? one extra month free for all Turbo minis members, PM me for detials |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
7th Apr, 2009 at 02:48:37pm
I think so. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
7th Apr, 2009 at 03:09:05pm
The big end's form a cross around the main journals, gives a totaly different power delivery which allows the R1 to punchout of corners like a twin with smoother power delivery.
Edited by Mr Joshua on 7th Apr, 2009. Own the day
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
7th Apr, 2009 at 03:54:41pm
I've never got my head around how a BIG bang and possibly be a smoother delivery than a std 4 cylinder layout! AlexF |
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 2406 Posts Member #: 341 aka T2clubby South Staffs |
7th Apr, 2009 at 04:05:33pm
I dont think it is bing bang, quite the opposite really, good video! |
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4314 Posts Member #: 700 Formerly British Open Classic The West Country |
7th Apr, 2009 at 04:06:17pm
as far as I can see there is at least one piston in motion all the time, removing the harmonic traditionally associated with straight 4s. Isambard Kingdom Brunel said:
Nothing is impossible if you are an Engineer |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
7th Apr, 2009 at 04:33:21pm
Thats going to be horrid from a balance point of view...
AlexF |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
7th Apr, 2009 at 05:06:30pm
I think it's safe to say they don't believe they know exactly how to address any balancing. You wouldn't have heard anything if they didn't have a solution already... On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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 2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
7th Apr, 2009 at 05:20:25pm
inteesting power delivery,
turbo 16v k-series 11.9@118.9 :)
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 1497 Posts Member #: 100 Parisien Turbo Expert Paris\' suburb |
7th Apr, 2009 at 05:50:19pm
sound logical like this!
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 6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
7th Apr, 2009 at 05:50:34pm
Hmm wonder uf sounds funny? Like its missing type of thing. 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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3006 Posts Member #: 2500 Post Whore Buckinghamshire |
7th Apr, 2009 at 05:59:33pm
They do sound off-beat,of course.The principal objective was to reduce the propensity of the normal straight four to spin the rear wheel on acceleration,by allowing the tyre to hook up between power strokes.Remember,these sports bikes are dispensing over 180 bhp through a tiny contact patch,especially when cranked over.It was developed for racing and is an undoubted overkill for road use but - fashion dictates. |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
7th Apr, 2009 at 08:28:27pm
That's not a big bang engine.. That's two cylinders igniting at the same time..
Edited by Vegard on 7th Apr, 2009. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
7th Apr, 2009 at 08:37:35pm
PMSL!
On 7th Apr, 2009 fab said:
sound logical like this! girls know this since eternity, bang pause bang pause bang bang pause  On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
7th Apr, 2009 at 08:42:40pm
Didn't we discuss this a while back when someone proposed doing it on an A-series? Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
7th Apr, 2009 at 09:15:21pm
i remember someone talking about a big bang cam for an a-series to get around charge stealing issues!? or i could have imagined it! turbo 16v k-series 11.9@118.9 :)
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 6274 Posts Member #: 509 Post Whore Isle of Man |
7th Apr, 2009 at 10:05:16pm
wasnt that a chap in vizards book?
"Turbo's make torque, and torque makes fun"
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 6965 Posts Member #: 507 Fastest A Series Mini in the World leeds/wakefield. |
7th Apr, 2009 at 10:21:45pm
On 7th Apr, 2009 joeybaby83 said:
wasnt that a chap in vizards book? something was discussed on here a while back, but i think it was immediately ruled out as the centre main might fuck off to spain? no, that crank just altered the firing order, |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
8th Apr, 2009 at 09:46:02am
I posted some pictures up with some VERY different crank designs....
AlexF |
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6274 Posts Member #: 509 Post Whore Isle of Man |
8th Apr, 2009 at 12:48:06pm
i think thats what i mean, 2&3 firing simultaneously?
"Turbo's make torque, and torque makes fun"
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2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
9th Apr, 2009 at 09:48:53am
On 7th Apr, 2009 tadge44 said:
They do sound off-beat,of Remember,these sports bikes are dispensing over 180 bhp through a tiny contact patch,especially when cranked over.It was developed for racing and is an undoubted overkill for road use but - fashion dictates. This is the crank fitted to the road going 2009 R1 or else it would not be alowed in a world super bike. There is no pause at TDC or BDC the crank seems to be working all the time. Well it seems this was firsted pioneered back in the thirties but no one created a patent for it. But now Yamaha have. Own the day
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