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  1. C

    1975 Mazda REPU - Build and Repair thread

    I’d like to get it idling back down at 750-800 RPM. That’s what it used to do with the carb. However the bigger issue is that the truck needs to really warm up before the idle can drop below 1,500. Normally the choke would be open for the first 10 minutes of driving, even in warm weather. So...
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    1975 Mazda REPU - Build and Repair thread

    Played with the Ford style 2-wire valve a little more this afternoon and I simply cannot get it to close. I shut down all the other ports on the intake and closed the throttle as much as it would close and still it wasn’t enough vacuum to pull the valve’s plunger and cut off the air supply. So...
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    1975 Mazda REPU - Build and Repair thread

    So the 2-wire Ford style IACV is not going to work. What I have ascertained is that they require a significant amount of air volume and consistent vacuum to stay closed. In resting state, a spring keeps the valve open. Suction through the valve will somehow pull the plunger and seal the...
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    1975 Mazda REPU - Build and Repair thread

    While I wait for the IACV to arrive I ran the new wires for it and cleaned up the harness so I could tuck the wires tightly behind the fuel rail. They’ll be out of sight when I put the air filter back on.
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    NEMOC Random BS Thread

    Haven’t heard of them.
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    NEMOC Random BS Thread

    I have a RaceQuip open face.
  7. C

    Lighter = Faster (RX-7 Build #2)

    For PCV, my REPU service manual shows the basic diagram. A check valve on the lower intake manifold sucks air via vacuum at all times, introducing that dirty air below the carburetor. It sucks from the oil filler neck and can also suck gas fumes from the gas tank. The lower port on the center...
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    Lighter = Faster (RX-7 Build #2)

    I haven’t done anything about crank case pressure either. I had planned to use vacuum to pull it out, but would need yet another port separate from everything else...otherwise dirty crank case air is gonna dirty up all the vacuum lines I have. Maybe I will work on something when I get a real...
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    Lighter = Faster (RX-7 Build #2)

    If you are trying to do a VE tune instead of TPS you will need the Map connected to both. No way around that, however the brake booster and FPR aren’t as sensitive to that. I say, get it dialed in, drain the hoses, then rev the piss out of the motor and cut the ignition every time you shut it...
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    Lighter = Faster (RX-7 Build #2)

    Figured I would come over here and see how your build was going. Didn’t realize how similar our builds were! Your setup is exactly what I’m considering for my FB (if I ever finish the REPU). I tried to research the fuel in the vacuum line issue but couldn’t come up with any suggestions other...
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    1975 Mazda REPU - Build and Repair thread

    The places I found fuel were low areas in the line where the evaporated fuel can collect. On the REPU the brake booster line loops up high before dropping down and I wonder if that was a factory solution to the same issue. See if you can shuffle around your likes to ensure any liquid in the...
  12. C

    1975 Mazda REPU - Build and Repair thread

    Funny you should ask. I noticed just the other day that there is a bubble of fuel in the clear vacuum line going to my ECU’s MAP sensor. Pretty much all the lines have some amount of fuel moisture but I don’t think it is affecting the vacuum reading. I forget where I left off with my trials...
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    NEMOC Random BS Thread

    I mount my smart phone to the windshield using the Quadlock system. It is a special case with an adapter on the back so I can also quickly mount it to my bicycle or a tripod. I then also use my GoPro and mount that to the outside of the car with a suction cup GoPro mount.
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    NEMOC Random BS Thread

    Yeah, he should have let me go at the top of the hill. That’s when I really started hanging in his rear view. Before that I was close (closer than the video portrays) but I didn’t know his braking points so I was rolling off the throttle early. He had better corner grip than me despite that...
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    NEMOC Random BS Thread

    You know what’s dead and buried? This forum! Lol! Facebook is alive and well for people over the age of 25, more so for people interested in specific hobbies like cars, cycling, fitness, cooking, etc as well as localized groups. There is a Facebook group for my neighborhood! Political posts...
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    NEMOC Random BS Thread

    “Fix a few things”, uh huh. Lost power from the storm, and no internet either. So I’m putzing around the house doing random stuff that has been piling up. Fixed the oil leak on the tractor, cleaning up the garage, etc.
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    NEMOC Random BS Thread

    Ouch! Heal up buddy. You're retired now, gotta take it easy! I've been working on the truck the last week or so. Mostly just tinkering with the tuning software and learning as I go. I think I've got a vacuum leak though. The vacuum reading is pretty steady, but when I get to high vacuum...
  18. adaptronic.webp

    adaptronic.webp

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    NEMOC Random BS Thread

    Been trying to hook up with Oleg for the last month, he's a busy guy.
  20. C

    Who is towing with their CX-9?

    My CX9 is the AWD model so it does have the transmission cooler. I've used it to tow a 2,500 camper 4-5 times a year since 2014, mostly up and down the east coast. Whether you need that package really depends on the weight you plan to tow and where. Under 1500 lbs, you're probably fine. Only...
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