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Everything posted by Comedian

  1.|Model%3ARC|Cars+Type%3AF&hash=item2cbc881cdc:g:7OIAAOSwWxNYyVzl I don't know much about car wheels, anyone think these would make a good emergency spare? Between 4 of us quite cheap. Stick a nangtang widowmaker on it for £50?
  2. Awesome Sent from my STV100-4 using Tapatalk
  3. Thanks colin Sent from my STV100-4 using Tapatalk
  4. Please choose which day you are most likely to attend the 10 year F bash.
  5. No, I'm saying 13:1 is if the valve was closed (the physical dimensions). The fact it is open probably gives you 10:1 or 9:1 in actual compression. I don't know these numbers are factual - it's an assumption based on the fact your manual says "Use 95"
  6. Imagine the volume of a cylinder. If you compress a 100% of the volume into 10% of the volume you have a compression ratio of 10:1 - that's how the figure is arrived at. However if we have a valve at the top that lets air out for 50% of the piston travel we only compress the second half giving us 5:1 in reality. So the piston does less work and that's how the engine is made more efficient. Less pumping losses. Runs cooler so more thermally efficient. Doing that process just on air in a tube raises the temperature hugely - it's that heat that diesels spray fuel into for ignition. Petrol has an octane rating so it doesn't burn in that heat and it is there while compression is happening. You also don't want it igniting on hot surfaces. So if you have a hot high compression engine you use a higher octane, 13:1 would suggest you need super but the manual says 95 even though the compression figure is higher than an RCF which has to run super. So with higher octane being more resistant it also burns more slowly so your max cylinder pressure comes at a different time. That's where ignition advance comes in. You could potentially actually lose power using 98 over 95. I don't know the valve duration of the Atkinson cycle so can't give exact figures. But if the manual says to use 95 then 98 is potentially a waste of money.
  7. Deposit

    That's the reason my wife gave for wanting an SUV - she just couldn't find one she wanted to pay for until the smaller ones become a year or two older. She's not 70 though so it applies to anyone really. My inlaws also want something more like this but it's out their price range.
  8. This is JUST the attendance poll - and so people can arrange to meet and convoy etc - please see Ratty's topic for all the juicy details and updates:
  9. 2018 RC F

    I sent Davi an interesting CVT with launch gear video and he said it was boring!!!!! I watched it twice for fun. I think we will have to stick to aeroplanes.
  10. 2018 RC F

    I suspect you are correct. Most if not all usually have some smoothing. This is fine as long as both are smoothed in the same way. I though it was odd one was smoothed and one not. But if we use a GSF then the new engine has lost everywhere as I suspected. The dip at 5 looks bad. Be interesting to see if noticeable to the driver.
  11. 2018 RC F

    Colin, could you pm me the numbers please? Sent from my STV100-4 using Tapatalk
  12. 2018 RC F

    Odd. Doesn't make a great deal of sense. Power curve looks reasonable and better than I expected, good midrange, loses over 6000. But as power is a function of torque x rpm / number for nm or lbft , then a wild T curve versus a smooth P curve is hard to comprehend. It's like one is smoothed and one isn't. As dynamometer measure torque and calculates power then if this is official then the power curve has maybe been artificially smoothed (by the look of it). Interesting. Thanks for sharing. Sent from my STV100-4 using Tapatalk
  13. Deposit

    The amount of potholes we have it feels like off road sometimes. I agree with you BTW Sent from my STV100-4 using Tapatalk
  14. F friends

    Daily temptation. That's tough when you think about it! Sent from my STV100-4 using Tapatalk
  15. Deposit

    It's not marketed TO those people. It's marketed so people will feel that's what they look like when driving. Selling you the dream not the car. Sent from my STV100-4 using Tapatalk
  16. 2018 RC F

    My car doesn't care what wheels it's standing still on :D Sent from my STV100-4 using Tapatalk
  17. 2018 RC F

    That's a nice design. Easier to clean yes :) 20 spokes not much fun for that. Sent from my STV100-4 using Tapatalk
  18. F friends

    Surely he could just keep running round the desk and broker a fabulous deal? Sent from my STV100-4 using Tapatalk
  19. 2018 RC F

    I didn't use the configuration so it's probably me :) I think they look nice but at the same time aftermarket. I could buy a similar design off the shelf. I actually prefer my common Base alloys to the lexus L to spokes. Less fussy. Sent from my STV100-4 using Tapatalk
  20. F friends

    Exact same engine in a more expensive trolley. Isf has different pumps on a similar engine. You should be OK :) Denso make the pumps and from what I can deduce this is the third version issued to these engines. something internal is not up to the job. It's taken a while to come up with the recall so hopefully they identified the issue and fixed it. Most problems occurred in the USA where they have more mileage and more track use. Car feels better to me. If you want to practice your haggling skills then ratty is the man :) Sent from my STV100-4 using Tapatalk
  21. 2018 RC F

    If the emissions control is restrictive. Probably hasn't but you might be confusing my use of examples of concerns with assertions - and I'm not making any of those. Where are the official new pics? I can only see current wheels on the UK site.
  22. 2018 RC F

    That's kind of twisting the argument into another matter. 300hp is probably more than enough. I'm simply saying that the 14hp peak loss might not be the full story. The engine doesn't make 470hp everywhere, below 2000rpm probably less than a 100. So I'd be curious from a technical perspective to see how the new technical changes affect the performance more broadly - not because it matters to Billy Talltales on his way to a conference ,sat on the M6 doing 22mph I have a technical interest in engines that goes beyond 'enough for highway use'.
  23. 2018 RC F

    the 14hp might not but throttle response may be. Without knowing more ....... impossible to say if it's a problem of not. Does explain the Nurbergering testing of the disguised but identical RCF last year.
  24. 2018 RC F

    That's peak performance reduction at peak horsepower. We don't know what the reduction is across the curve (if there is one) - it could be an unnoticeable difference or it could be larger - say if they was a 30hp loss at 4000 revs they wouldn't need to mention that as they only quote the rather pointless peak figures that one rarely uses.
  25. Reminder to participate in the poll. @Flytvr has a list of people to avoid and needs to know which day is safest