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Thread: Distributor-less Ignition feeler

  1. #21
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    Quote Originally Posted by clay72 View Post
    So timing would be adjustable by simply turning your custom pickup setup eh? It needs 4 separate inputs, so you can't run it off a trigger wheel?
    already caught your explanation pickup==cap

    And It has 4 separate OUTPUTS, yes you can tweak the base timing offset by cranking the dizzy, that functionality wont be impeded. Trigger wheel is exactly what my setup is looking for from the Gn, Ne inputs, so if you were to make a crank trigger wheel and cam trigger nubs you could plug up the diz-hole entirely. That would be like a 1uz setup, and perhaps smaller toyota engines also did this? It would be sweet if something like a 7A had that setup.

  2. #22
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    Not sure how helpful this is but I am running my stock AW11 tach with a relay coil, the collapsing field generates enough voltage to trigger the tach. I forget what coil I ended up settling on but I remember a bosch relay did not work at all. Would knowing the resistance of the coil I used help you?

  3. #23
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    Quote Originally Posted by briansexsmith View Post
    Would knowing the resistance of the coil I used help you?
    Nope, The inductance is the crucial parameter. Good to know that the relay trick seems to work on the MR2, Do you find that it's accurate?

  4. #24
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    I thought you might say that, I don't know the inductance of it... not exactly a switch on my multimeter

    Yes it is accurate, matches my laptop tuner tach. I found some coils only worked in some rev ranges.

  5. #25
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    Devils advocate here. There is no realistic performance gains in converting a NA 4ag to coil on plug. Just for space or looks. The only use for it would be for boost. 200hp and up sort of numbers, which require another ecu anyways.

    So your market would be people who don't want to chop their firewalls up on 20v swaps. Consider getting some 1zz COP brackets machined up for 20v heads to sell with these.
    BCWORKS

  6. #26
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    I think theres quite a few ppl who dont want to smash their firewalls in.

  7. #27
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    Bahhhh
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  8. #28
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    I think the 1UZ market would be the one to chase. As with the ECU. I know I would like this setup. Would free up a lot of space on the front of the 1UZ.

    Owners would want to make modded timing belt covers to make it worthwhile. Unless you're hardcore and run no covers so that rocks can fly in and **** up your T-belt/day day.
    1JZ 1984 Celica GTS
    1UZ 1981 Corolla sedan
    ? 1972 Celica race car

  9. #29
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    I am interested for 20V firewall clearance, mostly. I think that's the main market for AE86's.

    Jeff

    2011 GSE20 Lexus IS350 6MT F-Sport with LSD
    2005 NCP13 Toyota Yaris RS 5MT Hatchback
    1993 TCR10 Team Mondor Toyota Previa GT-S RM 5MT Studded Ice Race Van
    1986 AE86 Toyota Corolla GT-S 5MT Supercharged

  10. #30
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    Quote Originally Posted by Jehuty77 View Post
    I think theres quite a few ppl who dont want to smash their firewalls in.
    It's like an addiction to inter-racial porn; I didn't want to, but I did...

  11. #31
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    Quote Originally Posted by clay72 View Post
    I think the 1UZ market would be the one to chase. As with the ECU. I know I would like this setup. Would free up a lot of space on the front of the 1UZ.
    indeed! I can do a 1uz setup pretty easy, it's just a bit more counting inside the chip

    Quote Originally Posted by Jeff Lange View Post
    I am interested for 20V firewall clearance, mostly. I think that's the main market for AE86's.

    Jeff
    Because if ANYONE would want an OEM firewall

    Like I said before: I'm not looking to feed my family off of these projects, just cover their cost. Electrical engineering is my degree, my job and my Hobby - so are cars. the intersection of cars and eletronics is jolly good fun in my opinion.

    Good feedback guys, keep it coming.

  12. #32
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    Id be interested in getting one for a 20v as well as one for my 16v.
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    If only I put the same amount of effort into my schooling as I do my car. Education is important, but racecar is importanter.
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  13. #33
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    Funny that you would choose this exact day to jump start this thread, because look what I just got in the mail:

    Click image for larger version. 

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    the left half and bottom right are both 1UZ computer goodies but the upper left quadrant is this DLI board, ready for testing when I get back home for the holidays.

  14. #34
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    Can you please explain what the 1UZ boards are for?

  15. #35
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    So you design these boards up and get them made somewhere? Is that pricey?
    1JZ 1984 Celica GTS
    1UZ 1981 Corolla sedan
    ? 1972 Celica race car

  16. #36
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    Quote Originally Posted by briansexsmith View Post
    Can you please explain what the 1UZ boards are for?
    It allows me to run custom firmware on the 1UZ PCM. actually I should be able to run custom firmware on any toyota PCM based on the 64 pin d1518xx cpu with a little effort. You can see the parallel shrink-dip-64 lands for inserting the micro and ferrying down signals to the main board, plus the CPLD (tqfp100 land) and flash and ram (TSOP packages). Not visible is the extra UART I added for custom firmware communication to a host pc. the little board on the bottom right is just an adapter to get the bootloader onto the flash memory before soldering it down to the upgrade board.

    Quote Originally Posted by clay72 View Post
    So you design these boards up and get them made somewhere? Is that pricey?
    yes and no. I use the ExpressPCB (http://www.expresspcb.com) miniboard service in 4 layer production trim, so this run was ~150$ cdn for three of what's pictured. they have cheaper options for lower tech boards. the design software is free, but oh so handicapped compared to more comprehensive design suites.

    production runs of custom size boards start at around 300$ for the technology I'm using, but it'd probably be less than 400$ for a large quantity of boards.

  17. #37
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    Very cool!

    I know you still have some work ahead of you but when you find the correct coil that works to give enough voltage to drive the Toyota tacho would you mind sharing the part #? I would love to get rid of my clicking relay, do you think mounting said coil in my MS case would cause a interference issue???

    Sorry for going a little off topic.

  18. #38
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    For sure I'll share the specs.

    If the inductor is shielded it would likely be all right, though I'm not sure how sensitive to EMI the megasquirt is. best bet is to put it in a separate metal box, and twist together the coil wires from the MS box.

    if you want your relay to stop buzzing you can put a straw in the armature, or even remove it. I'm sure it's not super sensitive to the effects of the armature on the magnetic circuit.

  19. #39
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    Quote Originally Posted by Sparkie View Post
    I use the ExpressPCB (http://www.expresspcb.com) miniboard service in 4 layer production trim, so this run was ~150$ cdn for three of what's pictured. they have cheaper options for lower tech boards. the design software is free, but oh so handicapped compared to more comprehensive design suites.
    I'm sure you already know there's a few places that will do low volume PCBs, but have you tried OSH Park? https://oshpark.com/
    Their build quality and turn around time is great. I think the prices are pretty much the same as the rest. The difference is you get to use your standard design software. Just send them the gerbers and you're good to go.
    1972 Mango
    1993 Toyota 4x4

  20. #40
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    Great! and yes if I could only crack the relay open I could disable the mechanical bits but the relay is all sealed and potted. Funny enough it got a lot quieter after a few hours... mechanical bits might not like all that switching :-)

    I have been chatting with projectae86 offline about MS and I know get will need this info.

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