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Thread: Guilty as Charged: The Supercharger Mega-Thead

  1. #106
    6,000 rpm - mere mortals would shift HarryB's Avatar
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    I have been (reluctantly) looking to Rotrex NB setups, and I have a question for the supercharged crew. In all installations I have seen that retain both PS and AC, the belt wrap around the PS pulley is really minimal, definitely less than 90deg and most probably around 50-60, which would worry me. I was wondering if any of you runs a similar setup and can provide some feedback. Also, has anyone considered running an overlay crank pulley for the Rotrex? This would complicate the mounting quite a lot, but it *might* be better.

  2. #107
    Idling - Listen to it purr... Oregonmon's Avatar
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    Since the thread has been revived I'll add my setup.

    1990 with VVT motor. Made about 137hp/124tq before Rotrex.
    VICS mani, OBX header, RB exhaust. Aluminum flywheel and Supermiata 1.6 clutch.
    Using the quite small 75mm pulley, which is only making 10 psi (??) it made 234hp/184tq.
    With a 4.3 Torsen and 5 speed, it's a hoot.











    https://youtu.be/DeOBu-zEvaM
    Last edited by Oregonmon; 01-04-2017 at 11:45 AM.

  3. The Following 7 Users Say Thank You to Oregonmon For This Useful Post:

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  4. #108
    6,000 rpm - mere mortals would shift HarryB's Avatar
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    Love that car! Preparing my setup now, stock 1.6 engine, C30/74 with 80mm pulley. Love NA cars, so I am sure I will like the Rotrex power delivery, plus IMO it was the most "OEM-like" setup to my eyes.

  5. #109
    Idling - Listen to it purr... Oregonmon's Avatar
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    Quote Originally Posted by HarryB View Post
    Love that car! Preparing my setup now, stock 1.6 engine, C30/74 with 80mm pulley. Love NA cars, so I am sure I will like the Rotrex power delivery, plus IMO it was the most "OEM-like" setup to my eyes.
    What's the ROW 1.6 NBs usually make with bolt ons and stand alone? About the same as the US cars?

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