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  1. cossey3

    How relevant is BHP per tonne

    1900Nm @1800 rpm is ~480bhp and that is ultimately why it has the effect. you would get the same effect with 950Nm @3600rpm or even 190Nm @1800rpm. the reasons HD engines go for low revs big torque is that of longevity and fuel economy. the number that relevant is the power at the rpm the...
  2. cossey3

    Normally aspirated or forced induction?

    having driven a turboed car for 4 months now i am starting to see the real benefit. it gives the same or better performance than many v6s would but with genreally better fuel consumption, with the hughly wide torque band its perfect for a day to day car. but sports cars should still be N/A
  3. cossey3

    DPF Equipped Cars

    it gets worse, come euro 6 , we will have emissions for life requirements so if the emissions are outside "acceptable" levels then the car will not restart if it is not fixed promptly:eek:
  4. cossey3

    Impressive bike control

    http://www.youtube.com/watch?v=h_16O5rT4KY still my favorite
  5. cossey3

    How many percent of your salary do you spend on fuel?

    12.9% of, 375 miles per week in a car that gets 25mpg on super gets quite expensive. its suprisingly hard to find a vaguely practical ( ie 4 seats) real world fast car that will do 25mpg (my self imposed limit to try and keep fuel cost acceptable)
  6. cossey3

    RS4 Rolling Road Numbers - Another View

    they will make 414bhp when tested in an engine test cell at the relevant DIN/ISO standard, it is vey hard to cheat these figures and ou are in a lot of trouble if you do get caught. however it diesnt mean that if the engine isnt tested the same way you will get the same result. we struggle to get...
  7. cossey3

    Cars which just couldn't be improved by modding

    The 917's fame is mostly due the fact that it brought Porsche it's first win at Le Mans, the death of John Wolfe and the general lack of drivability comapred to the olde 908 of the pre kurzcheck cars has added to the myth but ultimately if it hadnt have gone on to become a winner if would have...
  8. cossey3

    Cars which just couldn't be improved by modding

    the ferrari came ready modified as it is a P3 chassis with a p4 body and the 917 only really became famaous after they had the tails chopped off to sort out the aero.
  9. cossey3

    Diesel cash guzzlers: It can take 28 years for them to be cost-effective

    NO if look at how many people drive then in gear acceleration is very relevant. for manual cars most people arent in the optimum gear for acceleration. the manufacturers have huge amounts of data showing that low down torque is prefferred, ideally this would be a wide and flat torque band as...
  10. cossey3

    Diesel cash guzzlers: It can take 28 years for them to be cost-effective

    there are separate arguments for fleet vehicles vs private sales. for fleets the cars are only usually kept for 2-3 years and tend to do high mileage. in this case diesels tend to make sense, low tax, better fuel consumption, similar maintenance costs and slightly higer residuals with the...
  11. cossey3

    Long rod question

    right for the rod: assuming the rod is made out of a normal material that conforms to all usual physical laws as you pull the rod the force you apply creates tension in the rod as you are accelerating the end the bit next to the end also needs to be accelerated for the rod to stay in one...
  12. cossey3

    Clarkson fires a broadside at the new Ka

    the impression i got from it was not so much about how bad the ka was but that it didnt live up to what he was expecting compare with the rest of the range. he has given very positive reviews to the focus mondeo and recently the fiesta. every other review ive seen has basically said the ka...
  13. cossey3

    How Porsche made billions..

    Porsche said has said fairly recently before this happened that whilst they were not planning to buy VW they were not going to buy 75% at that time so the market thought that there were going to be shares still available when they shorted. As porsche was buying these through options the market...
  14. cossey3

    How Porsche made billions..

    it was not quite as simple as that. porsche owned ~42% of VW and had arranged undisclosed option to buy nearly 32% more to make a total of just over 74%. the hedge funds knew porsche was buying shares but did not expect them to be able to buy that much in one go which was largely true as they...
  15. cossey3

    Ford Official Focus RS Press Release **£24,995**

    the volvo systems is the haldex setup used in the kuga. the focus was never going to have a proper 3 diff 4wd drivetrain.
  16. cossey3

    Nice sounding four pot?

    millington diamond http://www.youtube.com/watch?v=b43pqfbwLCM&feature=related
  17. cossey3

    Dodge Viper ACR runs the 'ring in 7:22

    wasnt the original development of the viper engine done at lamborghini? it was a cast iron truck engine that they redesigned in aluminium to cut weight but whilst the italians wanted to make it into a 4vdohc Chrysler decided to leave it as a 2v ohv to reduce cost.
  18. cossey3

    When does a polluting car become Green?

    The figures for lifetime I gave were ones from OEM vehicle specs ie the design life, I obviously cant post these as they are confidential. your LCA is hopelessly inaccurate and misses off the vast majority of energy that goes into a new car. I have read your other post and they are grossly...
  19. cossey3

    When does a polluting car become Green?

    thats is way off of true. for an average modern car the complete lifetime of the car is around 300-350,000 km for most manufacturers and they still take more energy to produce than they do in use. that is total production energy as in raw material creation, turning the material into parts...
  20. cossey3

    Anyone here own a bike powered kit car?

    the chain drive is the final drive on the bike ie the front sprocket has less teeth than the back so the gearbox output shaft turns faster than the back wheel of the bike. most superbikes have a chain drive drop of around 2.5-3.0 where as in a kit car you would use 3.2-4.0. when combined with...
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