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  1. #51
    Non-member Markey Mark (BD)'s Avatar
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    Re: gordini heads??

    Quote Originally Posted by allanr5gtt View Post
    what do you mean by scoff's car was hauling in 3rd ?
    Meaning he's crossing the line in 3rd gear

  2. #52
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    Re: gordini heads??

    Quote Originally Posted by Markey Mark (BD) View Post
    Meaning he's crossing the line in 3rd gear
    I think rob just ment that it was starting to shift a bit in 3rd gear, because lag, poor ratio's and broken synchro's ment that it wasnt doing much in the other gears.

  3. #53
    Non-member Markey Mark (BD)'s Avatar
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    Re: gordini heads??

    Quote Originally Posted by Scoff View Post
    I think rob just ment that it was starting to shift a bit in 3rd gear, because lag, poor ratio's and broken synchro's ment that it wasnt doing much in the other gears.
    Ah i see, thats cool mate

  4. #54
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    Re: gordini heads??

    hauling = northern term

  5. #55
    Non-member Markey Mark (BD)'s Avatar
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    Re: gordini heads??

    Quote Originally Posted by Scoff View Post
    hauling = northern term
    Think our version is 'shifting' for us southener's.

  6. #56
    Member Woznaldo's Avatar
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    Re: gordini heads??

    This is going a bit off topic but, Scoff what code VAG box are you using and what would be best for drags?

  7. #57
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    Re: gordini heads??

    Quote Originally Posted by Woznaldo View Post
    This is going a bit off topic but, Scoff what code VAG box are you using and what would be best for drags?
    Well, what I have may not be of much use to anyone because a lot of the choice making is going to depend on your torque curve, tyre height and predicted trap speed. I got 'most' of the ratio's right last year with my seat leon cupra-R gearbox, all apart from 1st gear which ended up being too short. Shifting even at 8200rpm would drop back to 5000rpm and since there was no boost until 5500rpm I had no power for about 2 seconds. also, the synchro's failed pretty quickly, adding to the shifting problem. The new gearbox has a mixture of ratios to suit my engine and new modified synchros, no off-the-shelf gear set was any use to me.

    Bare in mind that the cupra-R gearbox probably will not be of much use to others either, it has a 3.389:1 final drive which is pretty tall. I ran this with 25" tyres so that I could do the whole lot in 3 gears. the new final drive is taller still, since I was running out of RPM's in 3rd gear last year. It should be good for over 140mph in 3rd gear

    Back to the topic.... sorry

  8. #58
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    Re: gordini heads??

    Quote Originally Posted by Scoff View Post
    Tell that to the F1 designers, or the engineers at Yamaha responsible for the R1 and the like

    The saying should read "There's no replacement for volumetric efficiency" - but that wouldn't be as catchy
    Or there's no replacement for thermal efficiency, but that's even less catchy!

  9. #59
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    Re: gordini heads??

    Quote Originally Posted by Cabbage View Post
    Or there's no replacement for thermal efficiency, but that's even less catchy!
    Take a look at an F1 engines combustion chambers, there's no way thermal efficiency gets a look in. Why do you think they run them so hot? Volumetric efficiency of itself isn't that amazing either, the clever bit is maintaining it at those revs; Cosworth claiming 120% at 20000rpm!!!!

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