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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

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  1. mobythevan

    86 RX7 with Turbo LM7 and Megasquirt

    Pics are back online through photobucket for a while, but may not be permanent so I am working to upload them here on the server and relink. Check out the article https://www.denverpost.com/2018/05/17/photobucket-image-hosting-plans/
  2. mobythevan

    Ms3x install

    Just make sure you charge the battery completely once alternator is fixed and make sure the battery is good. We had one vehicle run terrible and tried everything for weeks on and off only to end up being a bad battery that supplied low volts to the entire system.
  3. mobythevan

    86 RX7 with Turbo LM7 and Megasquirt

    It has been a couple years, the car is still in the same state as mentioned in this thread. It runs good, I take it for a fun ride once a month on average. I have all the parts together to take it to the next stage of the build but I had lost my interest in it when my son passed away on Oct 1st of 2015. Over the last couple years I have been working on cars with one of my sons high school friend. I helped this young man install megasquirt on his miata and then rebuild his miata. I gave him my sons car (90 eagle talon turbo) and I am helping him right now on upgrading it to megasuirt, FMIC, 22psi. I have slowly got back my interest in revisiting my rx7 and taking it on to the next phase. Maybe you will start to see some updates in this thread. I have been out of the community for a couple years so I have lost track of everyone and what has been going on.
  4. mobythevan

    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
  5. mobythevan

    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
  6. mobythevan

    86 RX7 with Turbo LM7 and Megasquirt

    Mazda never released the specs so I'm not sure, haha
  7. mobythevan

    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
  8. mobythevan

    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.
  9. mobythevan

    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
  10. mobythevan

    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.
  11. mobythevan

    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.
  12. mobythevan

    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.
  13. mobythevan

    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:
  14. mobythevan

    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
  15. mobythevan

    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.
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