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Thread: The fastest Nova in the world

  1. #21
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    Quote Originally Posted by Mike View Post
    While i admire your optimisn theres a bit more to it then just brute force horsepower an weight.

    Total frontal mass, drag coeficiency, in gear accerleration, final drive ratio etc etc
    Drag Co I've done as much as I can really, closed front end, smooth as possible, slightly pointed.


    In gear acceleration, will have to wait and see how it acts, I've got pretty much the best boost controller there is, it uses a Co2 tank to apply pressure to the top of my wastegate instead of the exhaust pressure doing it, the controller then applies or removes pressure whenever it's calibrated to do it, I can offset boost pressure in any gear at any time against anything I want really, lateral G force, GPS position, throttle position, air fuel ratio but I think I'll be using undriven wheel speed, so the more ground speed my back wheel sees the more boost it applies, amazing bit of kit called AMS2000.


    Final drive ratio I have a choice, there's plenty available in the m32's, currently it has the Corsa Vxr FD of 4.18 which means if I was on a 225/40/18 tyre with 9000rpm limit I'd be able to hit 160mph on the dot in 4th gear using my current gear set, however I'm sending the box back to get an additional 2 gears fitted, I know 5th gear will see me at 178mph but the ratio of 6 is yet to be decided.

    However if I fit a final drive from the smaller Diesel engine m32 which is a 3.35 iirc that would see me do 200mph on my current setup and 222mph with the 5th gear and who knows with 6th, of course this is all theoretical and not taking any resistance into account but the numbers look like it can be done.
    I managed 169 mph with 250hp on an f28, I'd hope 4 times the power would help a little



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    Using a handy online calculator if I hazard a guess of a nova having a drag Co off 0.6 (that's the same as some buses) a frontal area 20 sq/ft a weight of 800kg to do 200mph I would need 653bhp


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    Senior User Club Member paul james's Avatar
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    Looking forward to seeing how this progresses, it looks great already.

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    chippy shoulder Admin
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    A cd of 0.6 sounds high, but then it's got an untidy underside etc.

    Have you considered a roof chop to ger rid of at least 25% of the frontal area and therefore reduce the power requirement or rather reduce the time to vmax.

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    Are we talking ET mph here or just top end speed

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    Quote Originally Posted by total_vauxhall View Post
    Are we talking ET mph here or just top end speed
    Not on the strip, separate challenge.


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    Quote Originally Posted by Stuart View Post
    A cd of 0.6 sounds high, but then it's got an untidy underside etc.

    Have you considered a roof chop to ger rid of at least 25% of the frontal area and therefore reduce the power requirement or rather reduce the time to vmax.
    I went high deliberately, the sums still show I'll have more than enough power to do it.


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    Sound mate you should get 200 mph no probs with the right gears and wheel size .

  9. #29
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    Roof chop isn't really an option, It would stop me entering most competitions and my head isn't far from the roof now even with the seat down low


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    I had a look at this in Ben's workshop with the old cage in. Its in good hands now that's for sure.

    Following with interest.

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