Car vs bike engine

Which drivetrain to choose, so many choices, 4-cyl? 6-cyl? NA? Turbo?
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Midlana1
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Car vs bike engine

Post by Midlana1 » 21 Jun 2019, 07:40

An owner comments on differences of a car vs bike drivetrain in a Seven (of course). I have my own thoughts, stated in the book, but have never driven a bike-engine car, so it's a good reality check to hear if from an actual owner. Best of all, he's driven the exact same car with both drivetrains, so he's in an excellent position to comment on both.
https://www.youtube.com/watch?v=aOqPo8fJzCQ

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rennkafer
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Re: Car vs bike engine

Post by rennkafer » 22 Jun 2019, 11:43

Not even sure if a bike engine would be suitable for a track only Midlana, as it's a fair bit heavier than a 7.
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Re: Car vs bike engine

Post by Midlana1 » 22 Jun 2019, 12:58

Fair point, but take out a turbo K24 and dry sump, and that's probably 300 lb weight savings.

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Re: Car vs bike engine

Post by rennkafer » 22 Jun 2019, 15:17

Per the guys claims, his 7 was 585kg (1287lbs) with the Zetec and 500kg (1100lbs) with the bike engine. If your car weighs 1700lbs as is, even a 300lb weigh loss would make it heavier than his car with the Zetec. When you're talking about cars this light, 200-300 lbs is a good sized percentage difference. Not saying it couldn't work, but I'd be concerned about longevity of components like the clutch with a BEC that heavy. A 1400lb car is 3-4 times as heavy as the bike the drivetrain came from. Just the opposite is true for the car components, they're designed for 2500-3500lb cars.
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Re: Car vs bike engine

Post by Midlana1 » 22 Jun 2019, 18:03

Right, which is exactly why I state in the book that a bike engine isn't the best choice for Midlana. I shared this guy's comments which back that up, if for other reasons.

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