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mobythevan

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mobythevan last won the day on December 23 2004

mobythevan had the most liked content!

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About mobythevan

  • Rank
    Swabbing The Deck

Profile Information

  • Gender
    Male
  • Location
    Calhan, Colorado
  • Interests
    Draft Horse Driving
    Turbo E85 Megasquirt EFI car builds
  1. Miata MS2 update

    Been helping one of my son's friends install MS2 on his 94 Miata. He has been doing all the work and I'm just filling in to help him learn. Got it running on Saturday. I've been out of the game for a while so it was a fun victory. Should be tuning next weekend. I am still around and working on megasquirt, who would have guessed, haha
  2. 86 RX7 with Turbo LM7 and Megasquirt

    Took the car to Pueblo Motorsports park to get 1/4 mile times. Tech'd in and lined up, but never got to race. They had problems with the staging lights and timing system. They don't expect to have the track working until September. ughhhhhh
  3. 86 RX7 with Turbo LM7 and Megasquirt

    Mazda never released the specs so I'm not sure, haha
  4. 86 RX7 with Turbo LM7 and Megasquirt

    Went out to the race event, but rain delays pushed back the 1/8 mile drags. They never did start before I had to leave. Still had a lot of fun. I must have been asked 50 times how big of turbo it has. lol
  5. 86 RX7 with Turbo LM7 and Megasquirt

    The car is back up and running. I took it on a 100 mile round trip in the heat and everything seems good. Might take it to a street racing event this weekend and try it in 1/8 mile drags.
  6. EFI conversion questions

    You do not need the air flow meter or mass air flow. Megasquirt normally runs as speed density and only requires a manifold air pressure sensor (MAP) which is part of the megasquirt box. I use one of these air valves from an Rx7 for fast idle on my simple setups. http://atkinsrotary.com/store/images/D/N332-13-720Detail.jpg
  7. EFI conversion questions

    If your cross country trip brings you through Colorado and you have some spare time I would love to talk over the Megasquirt setup with you. I would ditch the AFM, oem cold start valve and idle control valve. Start simple in that area and use a newer on/off air valve until you start to get more understanding of the EFI system. Then start playing around with nice to have features.
  8. Megasquirt not running

    I think you are on the right track to back up and try something you know has worked in the past. When I have problems starting an engine with megasquirt I go back and follow the first start guide. Like others have said, verify timing with a light. And then work through all of the basics for first start: is MS set to correct firing order, priming pulse settings, cranking pw settings, cold multipliers, etc. You said plugs are wet, but we don't know the context. Did you dry them out and then crank for two seconds and see them wet. Or, did you turn MS on and off several times plus some cranking and then see them wet. Keep at it, we will try to help.
  9. Grounding Wiring Organizing

    If you have any high voltage grounds like LS1 coils have, then ground them as short as possible to the engine. Don't run those ground wires back through the harness next to other wiring or you will get noise coupled into sensors.
  10. 86 RX7 with Turbo LM7 and Megasquirt

    Recently discovered that my used LS1 intake has had debris setting in it from the previously destroyed engine it came off of. I got some of this debris into 7 and 8 and damaged the top of the pistons a bit. I replaced those piston/rod combos with used 5.3 parts. Honed those two cylinders and did new rings on those two. I ordered a new Dorman LS6 style intake. I made a couple tries at cleaning out the other intake, but can still see junk stuck in it so it is going in the trash. While the engine and trans where out I fixed a few small things: added a drain plug to to the trans pan, added a piece of rubber between the steering rack and oil pan, very slightly ovaled my engine cradle bolt holes to properly fit the engine mounts and got correct bolts for engine and trans mounts. The engine and trans are back in the car. The new intake should be here before the holiday weekend. Here is some of the debris that dumped out of the old intake manifold, can't believe I didn't get more of it inside my 5.3:
  11. LS1 MegaSquirt Install

    Only new thing I did with this setup is install a toggle switch for E85 to Pump Gas. Now if I want to switch back and forth I pull into the filling station near empty and fill up with the other fuel type. I then start the car and wait for it to stutter, signalling me that the new fuel has made it all the way to the engine, then flip the switch. This works well for me, it only takes a couple seconds after firing up. Here are my notes: Tuner Studio indicator for tableswitch watches portH6, it is inverted. Meaning when the toggle switch is in the default position, down then it is open and portH6 see a high or ON state and this will be the base state for E85. When the toggle switch is flipped up then portH6 sees an OFF condition because the switch shorts the tableswitch wire to ground, this is the pumpgas position. E85 uses all 1 tables and gas uses all 3 tables. Went ahead and added warm up and after start to tableswitch. Now table switch does following: · VE table · Spark table · AFR table · Required fuel · Priming pulses · Cranking % · WUE % · ASE % · ASE taper Pumpgas required fuel 5.1 E85 required fuel (+34%) 1.34*5.1=6.83 Increase priming pulsewidths by 34% for E85
  12. 86 RX7 with Turbo LM7 and Megasquirt

    Working through more bugs, my rear wheel bearings are bad. Not sure if I have warped the axle tubes from welding on brackets. Will try a new set and see how long they last.
  13. 86 RX7 with Turbo LM7 and Megasquirt

    Finally finished up the rear axle alignment. It took me quite a while to develop some processes for levelling, centering, squaring and testing the watts link. I have to clearance a couple brackets to be able to get to the lock nuts on the LCAs. I put a couple lug nuts on each side to keep the brake rotors in place and then used a dial indicator to measure how well the watts link keeps the rear centered throughout the travel. At first the proportion of the two watts links seemed to be off with regard to the proportion of the arm that is mounted on the axle. After adjusting the proportion of the two links the rear stayed centered all through the movement of the axle (up and down using the floor jack).
  14. Ms3x install

    Glad to hear your up and running. Good Job! Here is the map sharing thread from the FAQ section: http://forums.hybridz.org/topic/34536-megasquirt-map-information-sharing-all-code-versions/
  15. anyone in phoenix with megasquirt who could test

    If it is possible for you to disconnect your GB wire from MS and then measure it with the voltmeter while turning the dizzy very slowly, you should see the voltmeter go between 12 volts and ground as the slots pass. Not sure if that is easy to do with things installed. Once you connect the GB wire to MS it is possible that you have a voltage divider because of resistors that are populated on the mainboard tach circuit. I cannot remember off hand. However, try the experiment if you can and that would verify the dizzy and pullup circuit are operating as expected. I think you did this earlier in the thread.
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