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1976 DC Resto

Discussion in 'Resto Corner' started by OSF, Oct 22, 2016.

  1. David H

    David H Well-Known Member

    Messages:
    3,839
    Location:
    newcastle
    Owns a bay does he:p:D:D:D?
    I'll be there sometime........soon.......maybe then....... or later;)!!
    Sorry for the thread clog OSF:(.
    Cheers
     
  2. OSF

    OSF Well-Known Member

    Messages:
    975
    Location:
    Sutherland NSW
    I'm sure the L-jetronic EFI is great for something that's 40 years old, as are well tuned carbies, but I'm after something a little bit newer as the plan is for this DC to get used and pretty much be my daily driver. I'm going with a Haltech Elite 1500 ECU and Mike from CBB is going to put it all in for me (when I can finally get my DC to him). There will be a coil for each cylinder, the dizzy will go and there will be a custom sensor in it's place that will allow the fuel injection and ignition to be full sequential and direct fire. There will also be a few sensors installed, allowing it to be set up for self tuning, engine protection (shuts down if oil pressure drops) and a fly by wire throttle (off a Subaru) that I'm getting installed.

    These clips pretty much give you the idea.




    Another potential benefit arising out of a modern ECU controlling everything is that there is potential for remote diagnosis if I do break down. i.e. Plug the laptop in, phone the Mechanic, link the Mechanic in from his computer to mine and he can check what's going on and give me some guidance. This isn't a big sales point for me though as I don't necessarily want to be tied to one Mechanic (and I can't guarantee I'll have my laptop with me and break down during business hours), but it might be handy to have at some point.
     
    Last edited: Sep 8, 2018
    AC-T3 likes this.
  3. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    19,106
    Location:
    Bracken Ridge, Qld
    Good logic behind the choice ;)

    Not sure about the presenter not wearing a seatbelt though :eek:
     
    OSF likes this.
  4. David H

    David H Well-Known Member

    Messages:
    3,839
    Location:
    newcastle
    Hi OSF,
    Pretty special bit of kit that F/I with 4 coils:cool:. I'm still trying to get my head around that:confused:;).

    Can you help me understand how this varies from L-Jetronic?

    It's a kombi so good planning;) but I'm sure with all your planning it never will.
    Cheers
     
  5. AC-T3

    AC-T3 Well-Known Member

    Messages:
    916
    Location:
    Woy Woy
    Good choice and has to be one of the best performance/reliability/economy/bolt on upgrades available. I did my '82 back in 2015 with a 4 coil over plug direct fire ignition and full sequential injection (plus cam and compression) and am still smiling with a 60% power/performance increase. And don't worry too much about being held to one mechanic - chances are you won't find yourself having any roadside conversations with your volksie. Confidence will come with time, miles and smiles. My "older" ECU doesn't have the self tuning/dyno/mapping function so would be very interested to hear how this works out. I'm told if you drive it like you stole it then it self tunes for maximum performance but drive it like an old fart then that what you get.

    Nice choice.
     
    OSF, Poptop and David H like this.
  6. OSF

    OSF Well-Known Member

    Messages:
    975
    Location:
    Sutherland NSW
    Hey David
    My basic understanding of EFI systems and the differences in them is that ultimately it’s all about delivering the right amount of fuel and a spark to each cylinder at just the right time over a range of different engine workloads. Full sequential and direct fire means the fuel and strongest spark possible is delivered to each cylinder and each cylinder only at the exact point when it is needed, as opposed to the older batch or semi-sequential systems where the injectors fire all at once or in pairs and the spark also fires in pairs. I think the L-Jetronic is a batch system where all the injectors fire at once, but I’m not 100% sure. The timing of all of this is controlled by the ECU which in modern systems uses information directly from cam/crank sensors as opposed to older systems which rely on information from the distributor. The modern systems also have newer technology and more inputs and outputs that allow for individual injector and spark control, self-tuning and a bunch of other things such as the addition of a fly by wire throttle. The resulting benefits are increased performance, reliability and less wear and tear on individual components (e.g. spark plugs fire ½ as much).

    This explanation is way simplified (as I'm out of my depth with this stuff), though I'm sure someone here will no doubt correct me if I am wrong or be able to fill in the detail/finer points.

    Cheers
     
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  7. AC-T3

    AC-T3 Well-Known Member

    Messages:
    916
    Location:
    Woy Woy
    Yes, that's about right. Add the fact that the older EFI systems use an air flow meter with a flappy gate thing and wiper track to measure air flow and talk to the ECU. Very inefficient, very prone to wear, very unobtainable as NOS when original units fail, and very un-rebuildable. Adding a new generation air flow sensor means the engine breathes more easily and gets the precisely correct amount of air for each and every combustion cycle. This ultimately means improved efficiency, performance and economy.
     
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  8. David H

    David H Well-Known Member

    Messages:
    3,839
    Location:
    newcastle
    Thanks Guys.
    That makes sense & I'd go for one (if I had the money:() given the improvement in performance & wear:).
    So I understand most of what's being said esp re crank/cam senders.
    How do the new air flow meters fit into the system/work?
    Cheers & thanks
    P.S. Pretty sure mine only uses spark after injector has spat in the barrel.
    Are you saying that the spark fires/injector actuates when it doesn't need to:confused:?
     
    Last edited: Sep 15, 2018
  9. OSF

    OSF Well-Known Member

    Messages:
    975
    Location:
    Sutherland NSW
    It's been a while since my last resto post. There have been a few more delays, a few more frustrations and a few distractions (one in particular I'll start a new thread for), but progress is continuing, a lot of work has been done, and I am steadfastly crawling towards the finish line. The front badge and wipers are on. My seat belts are in. The front door seals, door cards and door hardware is all on, the compliance plate is back on and my dash is all pretty much sorted (aside from my stereo and a couple of gauges, which will go on later). A bunch of other stuff has also been finished and subsequent to a bit more work getting things like the door seals to fit a bit better, it will be ready to go to Mike at CBB to put the engine back in.

    20181103_101018 (498x1024).jpg 20181103_100830 (498x1024).jpg 20181103_100843 (498x1024).jpg 20181103_100847 (1024x498).jpg

    My Hoops and Tow Bar are also now painted and ready to go on. They will go in the shed for now however, as I won't be putting them straight on.
    20181103_175944 (1024x498).jpg 20181103_175305 (1024x498).jpg

    Big shout out to Wayne and Smith at HEMCO who were not only able to supply my seat belts, but also took my requests for modifications, a couple of returns, and requests for further modifications in their stride. I'm very happy with the end result and my new belts are a massive improvement on what was there before.
     
    Last edited: Nov 4, 2018
    David H and Borgey like this.
  10. Daz77

    Daz77 New Member

    Messages:
    9
    Location:
    Sydney
    93535D75-FDDB-49CE-9390-FFD125449E9C.jpeg Mike has done his magic with my 77 swagman. I’ve got the Haltech 1500 ecu with drive by wire. After some initial tweaking, I can’t be happier. The bus just purrs like a kitten. Oh so sweet. On the initial setup the throttle was a little too sporty, Mike plugged his PC into the Haltech and changed the throttle ratio. I was so stoked on performance, drivability. It’s perfect. The only addition that I got was and extension cable put in the inside of the van with an OBDII cable so that I can view speed, RPM, timing, temperature, voltage and air/fuel ratio all from my iPhone. I do not need external gauges.
     
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  11. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    2,337
    Location:
    Seven hills
    The last 10% of most resto take longer to do then the first 90% of a resto.o_O:eek: So close but so far away. It might be time to get it moving to Mikes place if not much else can be done at current location at least it will be getting closer to home. I'll have to discuss more with you about seat belts on what you got. I've deal with Hemco before. They should remember you well so they shouldn't have any problems doing the order again.:D;)
     
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  12. Poptop

    Poptop Well-Known Member

    Messages:
    787
    Location:
    Clifton Hill, Victoria
    Fussy lot these DC owners!
     
    David H likes this.
  13. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    2,337
    Location:
    Seven hills
    You got to be a DC er to know a DC er:p If the shoe fits wear it :po_O;)
    What's the difference between fussy and precise.:confused:
     
  14. Grantus

    Grantus Well-Known Member

    Messages:
    15,043
    Location:
    Southern ACT
    “Fussy”, is a desired result, which may, or may not become “Precise”- an actual result. ;)
     
  15. David H

    David H Well-Known Member

    Messages:
    3,839
    Location:
    newcastle
    About a tray length;):oops::D & one extra foot:).
    Cheers
     
  16. David H

    David H Well-Known Member

    Messages:
    3,839
    Location:
    newcastle
    Where's all the bits that make it go;) including the heater boost fan? My engine bay could look like that without the necessary bits???
    Cheers
     
  17. Daz77

    Daz77 New Member

    Messages:
    9
    Location:
    Sydney
    I traded off performance for lack of heating. Sports exhaust has no heat exchangers so they are gone, hence the lack of heating etc. The engine bay is clean as. I’ve got an ECU tucked away in front of the aux battery. Fuel injection means minimal stuff hanging off the engine.
    I do apologise to all of the purists for changing away from the standard setup, but I couldn’t be any happier.
     
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  18. AC-T3

    AC-T3 Well-Known Member

    Messages:
    916
    Location:
    Woy Woy
    Now that's a nice result. Real nice. Got any dyno details??? Don't worry about purist's and originality, for someone has already cut an 'effing great hole in the roof of your '77. Same with all campers and modded/lowered street buses. There are very few pure, unmolested, unfiddled, unrestored rust free original busses out there. Just sit back and enjoy the drive.
     
    Barry likes this.
  19. Daz77

    Daz77 New Member

    Messages:
    9
    Location:
    Sydney
    AC, I was getting 83hp initially. Probable getting a few more ponies now that it is run in. Also that is with a CBB street performance rebuild.
     
  20. OSF

    OSF Well-Known Member

    Messages:
    975
    Location:
    Sutherland NSW
    Nice. I'm doing the performance rebuild as well, so I can't wait.
     
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