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willz

Senior Member
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About willz

  • Rank
    Senior Member

Profile Information

  • Gender
    Male
  • Location
    Longview, Wa
  • Cars
    1978 datsun 620, 2004 Land Rover disco, 2014 be tdi sportwagen
  • Occupation
    Papermill

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  1. willz

    Carburetion

    I guess that makes sense, just looked at some pics I had of my motor and it looks like the manifold is a tube and not square.
  2. willz

    Carburetion

    Aha! one person to chime in on going the trurbo route.
  3. willz

    Carburetion

    Mike, what I currently have is a 78’ 620 with what I thought came with a square (not circular) exhaust port W58? I’m no stranger to head work, pulling the exhaust shields in the head and welding any issues that might arise from doing that certainly isn’t a problem.
  4. willz

    Carburetion

    Also wondering if there was a particular head/bottom end I should look for? If I remember not all z24 motors were the same?
  5. willz

    Carburetion

    Thank you mike, this is the kind of info I was looking for. I really like seeing the L series valve cover in there and whatever I can do to make some power without it looking aftermarket was the goal. Just out of curiousity, did you cc the head?
  6. willz

    Carburetion

    That’s more like it. I want to keep the L series look there, but I don’t want to do the same old dual Weber’s or mikunis.
  7. willz

    Carburetion

    I’m not worried about a ka being faster, and I’m really not worried about the money it costs to do it. Simply if the 38mm SU carbs would support 150hp out of a built L motor.
  8. willz

    Carburetion

    Maybe it was the 2.3 liter I was thinking about
  9. willz

    Carburetion

    Custom rods and pistons aren’t a concern, I can live with the money spent on internal work on the motor as long as it’s under about $5k
  10. willz

    Carburetion

    If I did a long rod 2100 with the 46mm carbs and possibly a different worked over head would that put me close to that number? I see those motors putting 200+ with dual mikuni/Weber set ups and figured I could have a safe bet with 150
  11. willz

    Carburetion

    Driveability isn’t too much of a concern, I honestly only take the truck out a couple times a year for fun. If it was making more power I would consider racing it, as the truck sits though our track in Portland would be a little boring. 92 octane is about the easiest to find around here and E85 is readily availible although I haven’t heard of anyone using it on a datsun, I ran it in my Mitsubishi evolution with a few couple bolt ons and a day tuning at English racing and made around 400whp and 370tq.
  12. willz

    Carburetion

    A rising rate fuel pressure regulator and electric fuel pump would make quick work of that issue, but since I’ve got a hp number in mind....I guess back to my original question, will the SU’s be enough to make the power I want reliably? I don’t feel like 150hp+ to the wheels is asking a whole heck of a lot out of an L20 considering it will be completely torn down and rebuilt to whatever I decided to do. My concern with the 38’s is that they won’t keep up with the fuel requirements on the top end. 46mm carbs are availible from ztherepy and I guess that’s always an option as they look almost identical and only cost a few hundred little more than having mine rebuilt.
  13. willz

    Carburetion

    Are the SU’s sufficient for a blow through set up? I was curious about how well they would handle positive pressure. I suppose having the guys at ztherepy replace the bushings on the housings would reduce the chances for a leak, but I honestly don’t know as much as I would like to know about SU’s. Has anyone successfully run a dual SU blow through turbo set up?
  14. willz

    Carburetion

    I think it would be possible to, but the turbo set up I had in mind was using a Holley carb intended for turbo applications. I don’t want to reconfigure the SU’s, and I’m not entirely sure they would work well on a blow through set up
  15. willz

    Carburetion

    I should mention these carbs would be going on a L20b with the w58 head if I kept them. I don’t mind head work, valves/cam etc as I know I would be doing the same with a draw through.
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