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  1. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    I don't really understand what you mean with J2 and J3 going to a relay. Draw a diagram. Not sure why you need a fuse block for the ignition on wire, or a tach. CD deck I would power from the auxilery buss if there is room in the OEM fusebox. Alternately have it trigger a better connection...
  2. Mattax

    Stop in for a cup of coffee

    Feel for you. At least you're an air conditioned taxi. Two cars closed three lanes of traffic coming off the freeway coming into Madison last Wed. I knew it wasn't normal when folks opened their doors to get a look at what was going on. The exit was open so was lucky to be able to funnel...
  3. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    Depends on what is runningoff of that fuse block. The wire is 14 ga SAE, but when running goes though a bunch of connections and the start switch. Not sure but probably not fused - which is both good and bad. Less resistance is good. No protection for non-engine items on the engine circuit...
  4. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    Diagram here. J3 come sfrom starter relay https://www.forfmjbodiesonly.com/classicmopar/threads/ballast-resistor-wiring.11522/post-123771
  5. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    What I'm saying is that it sounds like the start wire from the igntion switch controls the relay When the relay closes, power goes from the battery feed on the relay to the starter solenoid and to the ignition start wire. Up through '76 for A-bodies, the relay does not have the BAL terminal...
  6. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    Bishko has been a big retailer of new and used service manuals etc. Try them.
  7. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    It seems IGN 2 begins at the starter relay. This is similar to how starter solenoids were set up on Jeeps to later 1980. When the relay trips, the ignition feed is connected to the power at the relay. When the key is released from start to run, the regular ignition feed connect to power...
  8. Mattax

    Stop in for a cup of coffee

    I added helper 1/2 leafs to my '75. One night on the interstate interchange got into tank slappers and then finally went round 180 into the curb. Long night.
  9. Mattax

    Stop in for a cup of coffee

    There is side movement when going around turns - more so the higher the rear is jacked. Also the higher the arch, the more the inner wheel moves back in the turn.
  10. Mattax

    Small block headers: worst to best fitting. List your experience.

    Worst to Best in a mid-gen A: Cyclone/Blackjack with Alumi-kote Went in OK (67 A-body), but trying to tighten the bolts to the head, on both sides the tubes near the collector contacted the chassis. Returned them. Went to used 340 manifolds instead. A couple weeks later my friend's brother...
  11. Mattax

    Stop in for a cup of coffee

    What are you trying to do? Mopar leaf springs should be nearly flat when static for most uses. For drag race launch, there should be some arch. Longer shackels can be used to get a little more swing (unfortunately also allows more sideway but not an issue for straight runs) as long as they...
  12. Mattax

    Stop in for a cup of coffee

    Last year I tapped the Grand? Wagoneer's oil drain to 14mm x 1.25 Yesterday wasted a ridiculous amount of time looking for a drain plug gasket / gasket. Most of what is available is mix packs...And I don't want soft metal washers that aren't soft. Going to give these a try. Oddly they only...
  13. Mattax

    Stop in for a cup of coffee

    It has the '69 side markers
  14. Mattax

    Stop in for a cup of coffee

    Train wasn't moving. That could be a long wait. Even when a freight train is moving, if I know a route around the grade crossing I'll take it.
  15. Mattax

    Stop in for a cup of coffee

    Got a map? Where's the nearest parallel road that has a bridge or is far enough away?
  16. Mattax

    Stop in for a cup of coffee

    I've got dad's copy. A note inside from the person who gave it to him. Still has the dust jacket.
  17. Mattax

    Stop in for a cup of coffee

    wait for me!
  18. Mattax

    Stop in for a cup of coffee

    Good luck Tim and enjoy the journey. Or as my classmate would say as I handed her a map "oh goody, an adventure!"
  19. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    That's possible. Sounds vaguely familiar but I can't claim to know for sure. Operationally the J3 is probably getting power when the relay is triggered by the S2.
  20. Mattax

    Struggling to find mufflers

    You're right. The one I have says Dynomax Similar to the master catalog here. See pages 8-9 for the turbo style https://www.dynomax.com/product-catalog/ or this https://www.dynomax.com/mufflers/super-turbo-mufflers
  21. Mattax

    Does this prove David Vizard's 128 lsa formula ?

    What dyno is capable of showing vacuum at idle? Com'on. Can even any eddy current setup chassis dyno hold steady or do a stepwise down at 1000 never mind 650 rpm? You want to test a bunch of theoretical changes? There's several decent simulators including pipemax, dynomation, and even more...
  22. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    Then how would he know if the battery is charging?
  23. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    One of those resistors is 0.5 ohms. One is 5 Ohms. The Ignition start wire (tradtionally J3 and brown) connects to the 0.5 ohm resistor. The branch going to the coil will no longer be used for the coil -so that's an easy place to connect any low current circuit that must be on with the key in...
  24. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    With a Hyfire on a '73, it could be wired liked this with the 12 V switched on connected to any location on the J2 or J3 circuit - as long as they are still connected together. The J2 and J3 connect through the 1/2 ohm resistor. The 5 ohm resistor - if still used in '77 for the first gen...
  25. Mattax

    Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

    First. You have a '77 Aspen. Many things you may have read about 'all' A-bodies, even if generally true, are different and do not apply to a '76 A body or a '77 F-body. Second. There is nothing on the older starter relays that would be useful for your purposes. The starter relay's stud...
  26. Mattax

    Struggling to find mufflers

    Walker's catalog is pretty good - look up the Dynomax Turbo style mufflers for diameter, offsets and lengths. Another company, maybe a little less prone to drone is Magnaflow https://www.magnaflow.com/collections/performance-muffler Same deal, look up size, length offset, etc. Offset should...
  27. Mattax

    '67 BUCKET SEAT HEADREST FABRICATION.

    Sorry. IIRC that photo came from Clair Davis before he sold them. He may be a member here but if so I don't know his username
  28. Mattax

    Stop in for a cup of coffee

    We're all working on our Captain Obvious impressions!
  29. Mattax

    Stop in for a cup of coffee

    That sure aint factory
  30. Mattax

    Rewire 67 Dart GT - need recommendations - what's best?

    Looking at this photo, even the wiper harness connectors were getting excessively hot. Do you recall what was the ammeter showing? My guess would be it was showing charge and if a voltage check had been made at that time, the alternator output would have shown over 15 Volts. Either the...
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