Renault R8/R10 carburettor throat water heating (R10 carbies essentially the same)
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Thread: Renault R8/R10 carburettor throat water heating (R10 carbies essentially the same)

  1. #1
    Too many posts! JohnW's Avatar
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    Default Renault R8/R10 carburettor throat water heating (R10 carbies essentially the same)

    Hi all,

    I'm seeking advice/experience from the R8/R10 clan please.

    I have a brand new 32 PDIST, bought from a supplier Europe, that I've never fitted. Looking at it the other day I realised to my surprise that it doesn't have the water-heated base section, the part that includes the butterfly shaft (and one of the main reasons you'd ever replace one of those carburettors). I'd never noticed.

    Does anyone know whether I might expect icing problems if I were to use this carburettor? The obvious answer might be "maybe on a long trip in cool weather" but I know that!

    I suspect that the coolant circulation might also help keep the carburettor from getting too hot in hot weather running, as it will also limit heat flow up from the manifold via the bolts.

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    Does anyone have direct experience? I think I'll leave the old one on for the trip to Griffith, as it works perfectly well except for the cold start idle speed up which I need to play with.

    All thoughts most welcome.

    Thanks
    JohnW

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    COL
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    Hi John

    This won't answer the question you asked but it may shed some light on why the carby you have is missing the water heating.

    There is a version for air cooled engines Solex 32-34 pdsit-3 311129026F - Boutique www.aircooled-museum.com

    Does your carby have the water heated auto choke?
    Regards Col

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    1000+ Posts Frans's Avatar
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    John,

    This won't answer your question either but my view is that many of these pre-heat things on the carb bases and air intakes etc will be for European conditions where you have minus plenty degrees in winter and the car stood outside and all that. I'm not convinced that any of those add ons are needed for the ambient temps that we live in.

    I will and have ignored those things in the past.

    Frans.
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    Young enough to do it anyway.

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    Quote Originally Posted by COL View Post
    Hi John

    This won't answer the question you asked but it may shed some light on why the carby you have is missing the water heating.

    There is a version for air cooled engines Solex 32-34 pdsit-3 311129026F - Boutique www.aircooled-museum.com Does your carby have the water heated auto choke?
    Hi Col,

    You'll smile. That's a different carburettor, a 32 PDSIT, mine is a 32 PDIST.

    Mine, like all the R8s, has the hot air driven automatic choke and idle ramp up.

    Cheers, and thanks of course.

    John
    JohnW

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    Too many posts! JohnW's Avatar
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    Quote Originally Posted by Frans View Post
    John, This won't answer your question either but my view is that many of these pre-heat things on the carb bases and air intakes etc will be for European conditions where you have minus plenty degrees in winter and the car stood outside and all that. I'm not convinced that any of those add ons are needed for the ambient temps that we live in. I will and have ignored those things in the past. Frans.
    Thanks Frans. I'm inclined to the same opinion. There are examples of friends with R12/R16s icing up travelling fast on cold mornings in Oz, so due to the latent heat of vaporisation of the petrol not the climate. I think I'll fit it one of these days, and I imagine I won't be able to tell the difference!

    New one from a European supplier suggests late model R8 from Spain, similar to Oz, and maybe they'd found the heater wasn't worth bothering with there.

    Cheers and thanks.
    JohnW

    Renault 4CV 1950 (R1062)
    Renault R8 1965 (R1130)
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    Renault Scenic Series II 2006 (daughter's)
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    CitroŽn CX Pallas 1980 (moved on to new custodian)

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    COL
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    Quote Originally Posted by JohnW View Post
    Hi Col,

    You'll smile. That's a different carburettor, a 32 PDSIT, mine is a 32 PDIST.

    Mine, like all the R8s, has the hot air driven automatic choke and idle ramp up.

    Cheers, and thanks of course.

    John
    Sorry John looks like I got dyslexic.

    I type in Solex pd and Google preempted and I just clicked on it.
    Regards Col

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    1000+ Posts renault8&10's Avatar
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    Bear in mind, no DCOE powered R12 engined car I've had has the water heating/cooling and I've never had any problems.
    KB


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    Quote Originally Posted by COL View Post
    Sorry John looks like I got dyslexic. I type in Solex pd and Google preempted and I just clicked on it.
    That's all right Col. I nearly bought the wrong one once!! It's pretty close in designation.
    JohnW

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    Renault Scenic Series II 2005 (wife's)
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    Quote Originally Posted by renault8&10 View Post
    Bear in mind, no DCOE powered R12 engined car I've had has the water heating/cooling and I've never had any problems.
    That's practical. Thanks Kevin. I imagine that like many of us, I have a few carbies in various states of disrepair.

    I suppose I should just blank the pipes off and run it for a while. Only just thought of that!
    JohnW

    Renault 4CV 1950 (R1062)
    Renault R8 1965 (R1130)
    Renault Scenic Series II 2005 (wife's)
    Renault Scenic Series II 2006 (daughter's)
    Renault Scenic Series II 2007 (mine)

    CitroŽn CX Pallas 1980 (moved on to new custodian)

    National Co-ordinator, Renault 4CV Register of Australia

  10. #10
    1000+ Posts schlitzaugen's Avatar
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    I think you might be able to fit the heater from the R12 single throat carbies. Perhaps this was the reason they didn't make your carby with that base anymore - they had switched to separate heater piece. My Euro R10 (1966 round eye) had one of these.
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    Hi John,
    I've always had various Weber carbs on my R10s, and have never used any water heating/cooling and have never experienced any problems, not in sunny S.A. nor in much cooler N.Z.

    Henry
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