Boudot Twincam
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Thread: Boudot Twincam

  1. #1
    1000+ Posts Mike Tippett's Avatar
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    Default Boudot Twincam

    A lovely little twincam head was developed by Boudot for the 4CV/Dauphine engine. A friend and I were on Tuesday afternoon visiting an old friend in Washington State and he showed us the Boudot kit that he bought in 1960 and has been new-in-box ever since. I snapped a couple of shots. The camshaft drive is taken off the fibre gear and transmitted to the OHCs. Distributor juts out from front of the timing cover.

    The head/OHC gear


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    Tiny domed piston


    The overhead cam drive take-off
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    Fellow Frogger! rubyalpine's Avatar
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    That's amazing! It was presumably very expensive in the day, otherwise a lot more would have been sold, I believe.

    Henry
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    Wasn't this at a time when there was Formula 750? So Hot Rod kits for "modern" engines had a market place.
    Now days Formula 750 would be all motorbike engines.
    Brendan.

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    I would imagine that however expensive it was "in the day", it'd be a lot more expensive now. Were I not to have moved away from the Ventoux engine for my 4CVG then I would be pleading with him to empty my wallet.

    Thanks to Mike for the post.

    cheers! Peter
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    Drool !!!

    Tragedy that it isn't being used

    Can imagine a long and fractious queue should he try to sell it

    Other question is whether it could be CAT scanned to make a CAD template so it could be reproduced. Suspect that the process is so stupidly expensive that it is only economic for elderly Bugattis or GP Delages, but if there is one in captivity it could be copied.

    Andrew
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    I read some where that the reason few were made was that the performance was not that spectacular. It was possible to get the same result with normal modifications. I will see if I can find the reference.

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    What a ripper find!

    Pics attached of how it all fits together. I'd say accuracy in assembly would be the order of the day!
    Attached Thumbnails Attached Thumbnails Boudot Twincam-dsc00658.jpg   Boudot Twincam-dsc00657.jpg  
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    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by Sunroof View Post
    I read some where that the reason few were made was that the performance was not that spectacular. It was possible to get the same result with normal modifications. I will see if I can find the reference.


    Still, would look like a million bucks in the engine bay of a Dauphine or some such.

    I wonder if it predates the Alfa twin cam. What a nice simple shape and smooth surface on those castings.

    PS. Simon just posted as I typed.

    Does anyone else see one too many gears in there? I mean an unnecessary complication?

    The way it is built it almost suggests you could do the same for any cross flow head, like the 807.
    Last edited by schlitzaugen; 17th January 2018 at 09:57 PM.
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    Wonderful find! I have seen one, also new in box, in a friend's garage in Paris. Quite a jewel. I suspect Sunroof is correct!

    It would look just superb in a car though, even if you could get more power in other ways. It should be matched with a Gregoire suspension kit of course.....

    Thanks so much for posting.
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    JohnW

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    Quote Originally Posted by JohnW View Post
    Wonderful find! <snip>

    It should be matched with a Gregoire suspension kit of course.....

    <snip>
    & a 4 or 5 speed transaxle; & front discs with rear Dauphine drums; & proper rear toe-control & a transverse leaf camber compensator; & a mild widening of the rims (4.5-5") to take advantage of TB15 170/65-15 tyres (or modern 155/60 or 165/65); & a front radiator & EWP: & quick steering.

    At least, had I stayed with the Ventoux, that's what I would have done if I wanted to keep it more or less standard but more interesting as a brisk road car.

    cheers! Peter
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  11. #11
    1000+ Posts Mike Tippett's Avatar
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    Most accounts of the engine I have read suggested that 60-70 HP was the typical output. But with a 904 cc big bore kit (60 mm, haha!) it might yield a few more. I think that 65 or thereabouts would be quite good in a Dauphine! Especially one with a Dauphine suspension. But it is utterly beautiful to look at.

    Incidentally, a friend of mine is hot on the trail of a 1093 in California. We were there last weekend (long road trip) and maybe it will come to something. We visited this Boudot kit owner yesterday evening, on the way home.
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  12. #12
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    Where in California? Maybe it is premature to ask the question! Good luck with the hunt.

    Cheers
    JohnW

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    Quote Originally Posted by Mike Tippett View Post
    Most accounts of the engine I have read suggested that 60-70 HP was the typical output. But with a 904 cc big bore kit (60 mm, haha!) it might yield a few more. I think that 65 or thereabouts would be quite good in a Dauphine! Especially one with a Dauphine suspension. But it is utterly beautiful to look at.

    Incidentally, a friend of mine is hot on the trail of a 1093 in California. We were there last weekend (long road trip) and maybe it will come to something. We visited this Boudot kit owner yesterday evening, on the way home.
    It would all be relative :-) . In "basic" form, the Boudot head apparently gained another 10 horsepower; it sounds so much better as a power increase of 25% over the standard Dauphine G.

    Sounds like a great road trip! All the best searching for the 1093, I'd say a US spec version would be a real rarity, especially with them being priced at Plymouth Valiant or Healey Sprite prices when new.
    Attached Thumbnails Attached Thumbnails Boudot Twincam-1093advert.jpg  
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  14. #14
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    Thanks Simon. Any chance of a higher resolution file and a date please? I'd like to send that advert around the 4CV Register.
    JohnW

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  15. #15
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    When talking about Twin Cam engines, it is always prudent to contemplate the MGA Twin Cam 1600, a vehicle with exotic specs and no real lasting advantage over it's pushrod cousins........
    Don't it always seem to go that you don't know what you've got 'til it's gone............

  16. #16
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    Quote Originally Posted by Kim Luck View Post
    When talking about Twin Cam engines, it is always prudent to contemplate the MGA Twin Cam 1600, a vehicle with exotic specs and no real lasting advantage over it's pushrod cousins........
    I thought they were much better at burning holes in pistons than the pushrod cars! Typical BMC, not developed properly..... But yes, no lasting advantage, that is for sure.
    JohnW

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  17. #17
    1000+ Posts Mike Tippett's Avatar
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    The exact location of the 1093 in California will be reserved because the owner is sensitive and does not want unsolicited attention. It's a longshot that the car will be saved, which is sad but basically the reality of the situation. My friend is working on the owner and will continue his efforts for a couple of years.

    It is a European spec version.
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  18. #18
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    Quote Originally Posted by Mike Tippett View Post
    The exact location of the 1093 in California will be reserved because the owner is sensitive and does not want unsolicited attention. It's a longshot that the car will be saved, which is sad but basically the reality of the situation. My friend is working on the owner and will continue his efforts for a couple of years.

    It is a European spec version.
    I'm sure we all wish your friend the best of luck! Thanks.
    JohnW

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  19. #19
    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by Mike Tippett View Post

    [...]

    My friend is working on the owner and will continue his efforts for a couple of years.

    It is a European spec version.

    TWO YEARS?!! Written off as waiting time?!

    Your friend can find a better, possibly cheaper car elsewhere and have it shipped around the world in that time.

    He must think there is something very special about that one car. Like, it was his father's brand new first car or something.

    Outside that possibility, no. No car is worth that much, not that one, nor any other Dauphine or any other car for that matter.

    Best of luck.
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  20. #20
    1000+ Posts Mike Tippett's Avatar
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    He will do this on the side and have another fun hobby car in the meantime. It's not like Charlie Brown waiting for the Great Pumpkin or anything .

    Very very few 1093s made it to North America and they all have racing or rallying history including winning the team prize on the Shell 4000 Rally (Trans-Canada), a FIA world championship event.
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  21. #21
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    Quote Originally Posted by schlitzaugen View Post
    .....He must think there is something very special about that one car.

    Best of luck.
    Saving something special can take a while..... It once took me 2 years to get an early R8 8-port head. It's a common problem to take ages to persuade some folk to part with something they aren't using, won't use and, worse sometimes, is deteriorating to boot.

    Good on him. "Best of luck" certainly applies too!
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    JohnW

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