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View Poll Results: Should steel crankshafts be used. | |||
Steel crankshafts...yes | 117 | 75.48% | |
Steel crankshafts...no | 9 | 5.81% | |
Leave it the way its always been | 29 | 18.71% | |
Voters: 155. You may not vote on this poll |
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25 Oct 2007, 15:05 (Ref:2051185) | #876 | ||
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.......... I can say no more
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25 Oct 2007, 15:08 (Ref:2051189) | #877 | ||
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Join Date: Aug 2003
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aye?
shouldnt you be asleep? |
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25 Oct 2007, 15:15 (Ref:2051202) | #878 | ||
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Join Date: Feb 2002
Posts: 680
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Nah been out with the Japanese, hence not being able to say what I mean in coherent words, Even these little dudes can drink more then me!
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25 Oct 2007, 15:17 (Ref:2051206) | #879 | ||
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Join Date: Aug 2003
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Brooklyn Beckham can drink more than you......
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25 Oct 2007, 15:20 (Ref:2051208) | #880 | ||
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Join Date: Feb 2002
Posts: 680
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Who? never heard of her! Stop reading HEAT magazine and fit some skid plates!
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25 Oct 2007, 15:39 (Ref:2051226) | #881 | ||
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25 Oct 2007, 15:44 (Ref:2051231) | #882 | ||
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or a smaller/lighter flywheel might do it?
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25 Oct 2007, 18:21 (Ref:2051353) | #883 | |
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Join Date: Jun 2003
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I'm sure it would, but then you have the issue of performance gains from a lighter flywheel.
Perhaps you can only have a lighter flywheel if your a big tall person. Oh, that means you could be well in there Justin. Nope. Sorry, keep it to steel cranks, it's simpler. |
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25 Oct 2007, 21:32 (Ref:2051539) | #884 | |
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Join Date: Dec 2003
Posts: 1,818
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Neil Bold has done some tests this year With Phil Austins crank to see if the power out put is the same as the Hilton ones.
Does any one know what the outcome was ? |
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26 Oct 2007, 06:57 (Ref:2051714) | #885 | ||
Racer
Join Date: Nov 2004
Posts: 201
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According to Mike Waite all was the same as both Neil & I expected that was last November and I've still not got the crank back!! Unfortunately I now understand that a new batch of cranks is needed and it will be coming from the original source Don Hilton. Mike Waite is supposed to be sorting thing now so I will just put my head back in the sand.
The lighter flywheel was also supposed to have been tested and again according to Mike no extra power was developed that could be noticed by Neil but Neil cannot measure the acceleration curve which if any thing would only be expected to change by a midges amount. As the overall car weight is not to change and an easy thing for all to do if details are made public why not do doth, you can save more rotating weight by swoping to alloy bell's & Disc set up! A smaller Dia flywheel is a non starter unless you all want to buy new bell housings and/or adaptor plates as the starter motors will not reach the ring gear. |
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26 Oct 2007, 07:20 (Ref:2051726) | #886 | ||
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26 Oct 2007, 08:37 (Ref:2051771) | #887 | |||
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26 Oct 2007, 08:40 (Ref:2051778) | #888 | |||
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Quote:
Surely a lighter flywheel has got to be soem advantage, I am sure the curve would be small, but wheel to wheel it could well be noticable. Clearly there is always going to be an increase in performance, it is unavoidable, but it would be good to keep it to a minimum so that people with old flywheels can still compete, and then just change to the new parts when the can afford to or need to. |
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26 Oct 2007, 08:52 (Ref:2051794) | #889 | |||
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Quote:
I think the standard clutch and flywheel for a Ford is about 13.5kg our lightweight one with AP racing clutch is about 4kg I think. So big saving. So no need to make it any smaller just don’t use a cast one. I am sure more cranks will last a lot longer without that 13.5kg of cast rubbish flying round on the end at 6,800 rpm.... |
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26 Oct 2007, 10:07 (Ref:2051844) | #890 | |
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I'm sure you are correct. Can we change the regs then or what?
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26 Oct 2007, 10:34 (Ref:2051870) | #891 | |||
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__________________
Built and Engineered FFZetec 2006 festival winner. 3rd 2009 & 2012 FFZetec festival final |
26 Oct 2007, 10:44 (Ref:2051884) | #892 | |||
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26 Oct 2007, 10:55 (Ref:2051886) | #893 | |||
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26 Oct 2007, 10:57 (Ref:2051888) | #894 | |||
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At the death 5 litres of fuel would sort it, or a stainless floor. |
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26 Oct 2007, 11:18 (Ref:2051899) | #895 | |||
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__________________
Built and Engineered FFZetec 2006 festival winner. 3rd 2009 & 2012 FFZetec festival final |
3 Nov 2007, 22:25 (Ref:2058872) | #896 | ||
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I've had to pull out of the Walter Hayes due to a running over the start of the kerb at Becketts - the apex of the kerb ran up the centre of the car, hit the skid plate and (being a point load) bent it out the way and then, unfortunately, hit the flywheel hard and sent me airborne ( http://www.youtube.com/watch?v=M2npFtEdzhc ). The ring gear has damaged teeth and is heavilly distorted, and the runout on the flywheel puts the flywheel itself under query. God knows whats happened to the nose of the crank but a strip, measure and crack test will provide all the answers. Of course, this means that my interest in this thread has gone markedly up!
If the weight/inertia of the crank is kept the same and the cost of the crank is reasonable (i.e. now iron cranks are not cheap either) then I think it's crazy not to allow a sanctioned steel alternative. There is no performance advantage, minimal cost difference, just a longevity and reliability improvement which is in everyones interest. I bought my car from a work colleague who had suffered crank failure in it at Brands - the damage was enormous and damn near split the block in two so it's certainly not something I'm keen to experience first hand. The only reasonable argument I see against it is whether anyone believes that it will allow an increase rpm but I suspect not. Flywheel size/inertia is something a bit different, because depending on the change it will have an impact both on transient performance and, if you were to take it right back to first principles and could run smaller ring gears then presumably it would allow lower engine installation height on new cars (certainly thats what it looks like on my RF88). Apologies if I've missed some retorts or counter-arguments to the above, but I've only read about a dozen pages of this thread and couldn't face all 60! |
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6 Nov 2007, 12:12 (Ref:2061092) | #897 | ||
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I'm guessing the limiting factor on revs is in the valvetrain?
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Ding dong....... |
6 Nov 2007, 13:11 (Ref:2061162) | #898 | |
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It is with the standard valve springs....
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6 Nov 2007, 16:58 (Ref:2061322) | #899 | |||
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Quote:
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__________________
Built and Engineered FFZetec 2006 festival winner. 3rd 2009 & 2012 FFZetec festival final |
6 Nov 2007, 22:43 (Ref:2061614) | #900 | ||
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Chris,
Are you suggesting an alternative on cost grounds or durability? Not sure a titanium crank would have survived that! |
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