1927 Humber 14/40

  1. Chickenjohn

    Chickenjohn Morris Minor and Porsche 944 fan

    Messages:
    1,284
    Location:
    East Kent
    It actually looks like a pretty good design, the inlet goes straight above the piston and both valves can be a lot bigger than in a pure OHV or side valve design.
     
  2. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    Well after many weeks having not much time to do much (guess we all have this problem) Anyway I have finally got the rebuilt engine in place. yep still a bit more to do before I can run this thing, but spinning it round at least I get the correct oil pressure 26lb and that's through a paper filter rather than the original gauze / mesh.
    So once I have finally fitted the cylinder head, magneto Ill need to weld some pipe up to form an exhaust pipe.

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  3. Norm Member

    great to see this progressing again, still anxious to see the finished article.
     
  4. ytre

    ytre Member

    Messages:
    365
    Northern Ireland
    That a brilliant job :clapping: keep up the good work, it'll be a stunning car once its finished
     
  5. penfold

    penfold Ambassador plenipotentiary

    Messages:
    2,119
    Location:
    Argyll and Bute, God's own country.
    I've seen it called Inlet Over Exhaust(IOE) also.
     
  6. jpmillermatic

    jpmillermatic Member

    Messages:
    779
    USA-NY
    what a great project, first of all...that engine really is beautiful..especially the way you are finishing it....the aluminum bits against the black block are stunning.

    keep it up

    JP
     
  7. ronan

    ronan Forum Supporter

    Messages:
    8,930
    dublin
    A lot of early motorcycle engines were inlet over exhaust. I suppose its a bit better than in performance than a purely side valve engine.
     
  8. bill_gj

    bill_gj Tired and irritable

    Messages:
    1,389
    Hockley, Essex
    I can imagine that thee are real performance benefits, as long as the shape of the combustion chamber is ignored.
    1) Keeping the ports as far apart as possible - allows the designer to use all the local space available for the diameter of the ports - they're not squeezed into the same casting.
    2) Overhead inlet - the port can be much more downdraft, allowing efficient gas flow with minimal losses.
    3) The side exhaust valve is directly operated via an adjuster and the camshaft. his will minimise loading, inertia and noise and potentially let the engine rev higher.

    The bad bit is the compromise on chamber shape and the way the charge burns.
     
  9. octo0072000

    octo0072000 Member

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    5,235
    Location:
    south yorks
    was it also called the L head on the rover ?
     
  10. bill_gj

    bill_gj Tired and irritable

    Messages:
    1,389
    Hockley, Essex
    Think so
     
  11. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    Update time

    Oh how time flys, So almost ready for that first engine test run... if it starts it will be the first time since between 1950-1960.
    But I am waiting on that all important radiator, my own stupid fault. I startted polishing the nickle outer shell which is part of the water jacket. Then without warning it flew off the table i was using onto the floor and put two large dents in said nickle. Note to my self, strapp the thing down. but at least all the welding for the exausht worked quite well, the silencer is from a modern astra (same size as original) but had to fab brackets onto the chassis, weld in, then need to move them all by 10mm, but its there now..

    So the pictures can do the talking,
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  12. SiPMerlin150

    SiPMerlin150 Member

    Messages:
    983
    Location:
    Sunshine Coast, Queensland
    Will you video the initial start up of this engine? Its always nice to see an engine splutter into life after so many years. Is the head ready to accept our petrol of today? Or will you need to give her a lead substitue?
     
  13. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    YeP I am going to try doing a quick video when it starts, or should i say get someone else to hold the camera to film the backfires till I get the advance set right.
    Valve seats are hardend so I should be able to use unleaded although the valve guides are standard.
    Just need to find someone with a metric lathe, as i neeed 2 inspection covers (really just a short 40mm dia bolt) for the diff, then I would be able to strap a garden chair on and go for a run (on my own drive)
     
  14. SiPMerlin150

    SiPMerlin150 Member

    Messages:
    983
    Location:
    Sunshine Coast, Queensland
    I can only imagine that after so much hard work, all you would like to do is take it out on the road for a drive. Valve guides are normally another item which could wear dude to lack of a lead lubricant. There are literally tons of lead replacement additives out there. The only one certified by the 'FCC' is 'Castrol Valve Master' There are two types, one is a lead replacement, the other is an octane booster. I used to run a 1988 turbo volvo that needed a high octane petrol, and after searching, I found a little places in Holmes Chapel call the 'Jubilee Garage' That still sells Leaded at the pump for the passers by of classic cars going to and from classic car events in Tatton Park. Boy, did that Leaded fuel give my volvo that extra kick!
     
  15. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
  16. Jdl New Member

    Messages:
    1
    Lancashire
    I've just found this thread and your restoration and it's a great read. I have to confess I've not an interest in welding but do have an interest in vintage humbers - mine is the smaller version of the 14/40 - a 1928 9/20. If you haven't already I would suggest joining the Humber Register http://www.humberregister.org.uk/ - its probably the best £25 you can spend as it gives you access to club spares and others with the same type of car, often the later is invaluable as you can inspect other cars to understand how things have been done and how and why they are like they are!

    Good luck and hope to see you on the road soon - John
     
  17. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    Update time, well I have been able to make the most of the good weather, getting bits painted etc. Since the last post ive still not finished the bonnet, but getting there slowly due to lack of experience bending sheet steel and playing with my welder.
    But jobs done are, bracket for horn, fuel tank welded by someone else, modified a wheel to suit with new PCD laser cut out, all painted. shame the update looks small compared to the work ive done, but i guess we are all in that boat.
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  18. CompoSimmonite Member

    Messages:
    4,182
    Location:
    Werrington, Stoke-on-Trent
    You can get automatic unleaded additive injectors. They are normally intended for LPG converted vehicles and engine vac sucks additive in. I've got a couple of airline auto lube units I intend playing as basically the same operation. Only problem I can see will be "calibrating".

    Paul H
     
  19. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    Time for an update on my long running project.
    As is life, it gets in the way, moving house to one with no garage, having to build one then there are the other parts of life to contend with.
    So while I was dealing with the garage build the project had to stay in a tent/ portable Clarke garage thing for just over a year, followed by another 6 months while a drive was made.
    So here we are now after many months of getting frustrated in learning how to make the panels. The original car was steel up to the waist line with Ali above, so the Ali remains but the steel has to all be remade. The steel is simply nailed over the Ash frame and 0.6mm thick, which is fun trying to weld, with minimal distortion. The finished rear quarter panels are just now in epoxy primer, they will need a tiny bit of filler over the weld line. but overall im very happy 20190303_153431_1561638629217.jpg 20190226_161514_1561638629294.jpg 20190226_161454_1561638629397.jpg 20190106_181923_1561638630081.jpg 20181028_154740_1568893498230.jpg 20181028_154729_1568893498168.jpg 20180611_084638_1568893497477.jpg
    Time for the pictures
     
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    slim_boy_fat likes this.
  20. RBDIVE

    RBDIVE Member

    Messages:
    96
    uk notts
    more pics 20190917_160950_1568892102649.jpg 20190915_083927_1568892102775.jpg 20190810_160747_1568892102842.jpg 20190810_160736_1568892102974.jpg 20190217_134555_1561638629488.jpg 20190626_195852_1561637976006.jpg 20190623_163610_1561637976148.jpg 20190310_161407_1561638628879.jpg
     
    Dcal, jpmillermatic, zx9 and 3 others like this.
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