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Thread: How Fast do Turbo’s spin?

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    Guest Asht_200's Avatar
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    How Fast do Turbo’s spin?

    When looking at Hybrids, ok nearly 20 years ago. Turbo Technics were balancing them up to 100,000 rpm

    Nissan are quoting for the VR30DETT 240,000 rpm. That means the turbo spins 4000 times a second!!!

    How fast do F1 MGU- H spin at?


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    Guest R3K1355's Avatar
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    Are you sure 240,000 rpm? Thats pretty high.

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    Guest stoofer's Avatar
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    F1 is limited by regs to 125,000 rpm turbo spindle.

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    Guest Asht_200's Avatar
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    Quote Originally Posted by R3K1355 View Post
    Are you sure 240,000 rpm? Thats pretty high.
    Yep they quote 240,000 a record for a production V6.

    The turbo is built in to the Inlet Manifold


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    Banned sideways14a's Avatar
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    240 thousdan ripums is a lot of ripums.

    Imagine a blade came off at that speed, nasty.

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    Little ones are speed freaks. GT1544 210000 on map but you wouldn't want to go much above 200000.


    Bigger ones that are useful for 1.8-2.0L 4 pots run nearer 150000.

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    2015 been kicking around for 5 years now.
    https://www.caranddriver.com/news/a1...3-0-liter-v-6/
    https://conceptzperformance.com/blog...turbochargers/

    The turbo isn't part of the inlet or exhaust manifold. The exhaust manifold is cast in the head and the turbo bolts on by a flange. By casting the exhaust manifold in the head it completely eliminates the problem of heat soak from manifold to turbo. This comes at a price of needing a bigger and better engine cooling system. Ford Ecoboost does the same. It flies in the face of conventional wisdom for head design that says keep ports as short as possible in the head to prevent heat pick up. VW's VR6 was the first engine with long exhaust ports in head.

    It's going to be a bugger to port and specific power is piss poor for a turbo in this day and age but the width of the torque curve probably compensates for most real driving on road.

    1988 CA18DET (RS13) 169 bhp, 93.8 bhp/l.
    1991 SR20DET 205 bhp, 102.5 bhp/L
    1999 SR20DET (S15) 250 bhp, 125 bhp/L.
    2002 SR20VET (X-Trail GT) 280 bhp, 140 bhp/L.
    If it was on trend they should be making over 160 bhp/L and at least 150 bhp/L.

    Where the tuners were at 10 years ago.
    Evo FQ400 2L, 400bhp, 200 bhp/L.

    Ford 1.25L Ecoboost 125 bhp, 100bhp/L. (This is really hot for a production Ford as they are always 2 decades behind unless they outsource the engine dev to Cosworth.)
    Nissan VR30DDET 300bhp, 100 bhp/L.
    Nissan VR30DDET 400bhp, 133 bhp/L. So the manifold in head has cost at least 50 bhp and maybe 80 bhp.

    100 bhp/L is now common place for normally aspirated engine with variable valve timing and lift.

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