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Thread: Pub talk....

  1. #1
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    Question Pub talk....

    Just curious.....

    What would your best guesstimates be for a 0-60 time and top speed for a 150 diesel with a tuning box (CR1 in my case)???

    Wondering how it would compare to the brochure figures.

    Cheers m'dears.

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    0-60 = on or just after 8 secs

    Top speed = not affected by a tuning box.

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    Cheers AJA.

    'scuse my ignorance though...but why is the top end unaffected with an added 30% of bhp?

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    I think it's a gearing thing matey. This is only my personal experiences of my car and a few others with different boxes on.

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    Cheers again mate.

    My mate reckons his 2.2dci Primera performance is within touching distance of the Vec..!? Oh puh-lease.

    I usually laugh it off...but its starting to wear now. Think he's being serious. :-)

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    Mine's no better (top speed) with a box on, and neither is a few other members on here Andrew .

    I've received questions on this very thing from various members saying that their cars top speed is no better and is it right.

    To be honest I'm glad the box doesn't increase the top speed as I think the cars are fast enough for the chassis and brakes.

  7. #7
    Regular Member Andy's Avatar
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    back in the days when cars and car conversions was more technically minded than present, they ran a feature on how BHP and Torque affected performance times.

    It all got quite sceintific but they concluded that it was reasonably easy to see good 0-60 and in gear improvements from even small hikes in power, but top speed was a lot more power sapping. something crazy like you had to increase bhp by 10 to see a 1 or 2 mph increase, so alexs theory that top speed doesnt really change does bear out. With a 45bhp increase, should only see 4 or 5 mph increase in top speed.

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    If the standard car's top speed is governed by the rev limiter in 6th (i.e it'll hit it), then a chipped car is never going to be able to go faster than that.

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    Where would you go to test the difference between 150 and 180 BHP ????? It is correct that top speed is affected greatly by wind resistance, believe its summat like the square of the drag factor. Std top speeds are approx 130/135 Estate/Hatch.

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    I Run Astra 150 Sri With Regal Map Use To Pull 135 B4 Map Now Pulls 150 Only Revving To 4000rpm In 6th Pulls Torque Does Help To Pull Higher Top Speed In High Gears

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