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Thread: My Accord build carputer communicating with ecu REAL TIME TUNING

  1. #21
    Constant Bitrate AutoWiz's Avatar
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    here is my engine bay today. unfortunately, my placement of homemade fuse and relay center has restricted my ability to pipe cold air into the intake. this is an issue I must resolve, as it makes me pull time when the motor gets up to operating temps. as iat gets up to 170f. the new alternator wiring is temporary. just swapped in 160amp alternator with smaller pulley to generate more amps at idle. and here is a pic of my underhood fuseblock. in an attempt to maintain a clean appearance/install, I re-assigned pins in the fuseblock to handle ems-4 ckt needs. the homemade fuse/relay center next to the battery is exclusively for the nose of the vehicle (4 h.i.d. ballasts, 2 radiator fans, and 1 condenser fan), and yes I put my name on my build.
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  2. #22
    Maximum Bitrate rray's Avatar
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    It's a lot of work, but if you were to move the battery to a vented box in the trunk, you could fit your CAI back in. My Camaro is the first car I ever had with a battery in the trunk, and it really free's up some space.

    I looked at the HPTuner site, and it looks like quite package, but mostly above my skillset, as I don,t know jack about tuning other than I would want to learn to turn off that DOD mode and tune the car for higher octane gas to start. This is my first car (second Camaro in 18 months) bought as a hobby toy, and I want to mod it and have all the fun you are having.

  3. #23
    Constant Bitrate AutoWiz's Avatar
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    while I took a course at the tuning school in Odessa, FL. there is also an at home course they sell called "tuning the right way" between this at home course, and youtube tutorials, and hptuners forums, I am sure you will find your way around. just remember to save files often and there's no fear because you can always go back. I will not kid you on the price. the pro kit that allows you to plug extra sensors into mpvi interface(egt, boost, wideband, etc.) is I think $700, the course has it's price, and every vin you want to lisence is 2 credits, or $100. but the kit comes with a handful of credits to get you started.

  4. #24
    Constant Bitrate AutoWiz's Avatar
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    and I love the idea of moving battery to trunk. I've just been real lazy about taking a pair of dykes to my car, again. in 2012, I parked my car and gutted the factory copper the last day of school for my kids, so I could drive the wife's minivan to and from work. my original plan was to have everything wired and back together by the end of summer, and I didn't get finished 'till December. I have a growing list of things that need to be done electrically. I need to wire in marker and turn leds in my new power mirrors, I need to run ignition wire to my new 160amp alternator, and I need to get behind my instrument cluster, so I can add 10k ohm pull up resistor to my tach signal wire so the Honda tach will work.

  5. #25
    Maximum Bitrate rray's Avatar
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    The battery relocate is easiest if done in stages. What I mean is stage 1 would be plan the route of the positive wire, deciding where the 2AWG will route without rubbing anything, and where your under hood remote jumper cable posts will mount after leaving room for your CAI.

    Then stage 2 would be to squirrel away enough jack and get a kit with alle the relocation stuff:


    Stage 3 would be start hooking up everything from the trunk first, mount the battery box, except actually placing the battery. Let stage 3 take a few weeks so you have time for the wife and kids. Run the positive wire as the only task for that day, etc.

    And when stage 4 happens, all the stuff you need to do will just be the front left of the engine compartment connections, then putting the battery back in. This kind of approach should make it easier and not leave your car down incase you have to put the project on hold.

    I'm doing the same thing right now with my build, I have all the audio installed and running with the stock head unit, where the pc is installed but not wired and I am modding a dash panel for an 8" screen on the bench. The screen will go in last so I don't have downtime.

  6. #26
    Raw Wave
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    Not forgetting that to be legal (and safe), that "sealed box" needs to be vented to the outside if its fitted with a vented (wet cell aka flooded) battery.

  7. #27
    Constant Bitrate AutoWiz's Avatar
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    for sure. if I were to go this route, i'd switch to a Mercedes style battery that has a port on battery to plug a vent hose into. then it'd just be a matter of drilling a small hole in sheet metal and finding an appropriate grommet. I am also giving a lot of thought lately to ditching spare tire for extra space in trunk. the spare is an oddball size compared to the 4 rims I got. and the corvettes I work on all day don't have a spare, so I am already used to the idea. so maybe I will just slap on a set of run-flats, and mount battery where spare used to be. out of sight, out of mind.

  8. #28
    Maximum Bitrate rray's Avatar
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    I don't have a spare tire either, mine came with a small compressor w/ can of sealant and the vented battery in the spare tire space. I did use the extra space to put another (sealed) battery for the stereo amps and carpc where the tire would go, so it frees up the whole trunk, what little of a trunk I have.

    Here's how it looks if interested:
    Dual batteries in spare tire well

  9. #29
    Constant Bitrate AutoWiz's Avatar
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    that looks pretty clean rray. and I see you are using the same Mercedes style battery I mentioned earlier. but I don't see any hoses running off the vent port on top of the battery. that battery needs to be vented outside the vehicle so if you are ever inclined to stuff someone in your trunk they don't choke on toxic fumes. it may be unthinkable today, especially with such a small trunk, but you never know what tomorrow may bring.

  10. #30
    Maximum Bitrate rray's Avatar
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    Mine is vented on the right side (black nipple at top side of picture) and the left side vent is plugged. I guess you can vent either side, or both if you want. It's only a torso trunk, not a 2 body caddy trunk.

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