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Thread: Project Car: 1968 Plymouth Roadrunner build thread!

  1. #61
    Grumble bum 68RNR's Avatar
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    Well thanks for all the really usefull information which has helped me with my problem :P Yes I was being sarcastic.

    Anyway! I have tested the MSD and the coil and both are fine. There is spark, no worries. The problem appears to be that the MSD has 2 feeds, 1 dedicated 12v battery feed (big thick cable) and a 12v accessories feed which turns it on and off. With the key in the ignition set to 'on' i have 12v on both wires. When you crank the engine over the 12v accessories seems to dissapear, hence the MSD 6al turns off...

    I jumpered the 12v accessories feed to the MSD directly from the battery and the big girl fired straight up without a hassle. SO for some reason when my key is cranking the engine over, my 12v ignition feed is dissapearing. Weird.

    Any "Constructive" thoughts on this??

  2. #62
    Loving teh titties.. carcrazy's Avatar
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    A lot of older cars cut the igniton feed when they are cranking over.

    The way to overcome this is to run a wire off the starter circuit usually with a large diode inline to the msd box ignition feed wiring. That way you have power on ignition and cranking so the box doesnt get upset.

    Ive also seen people use relays to do this but that brings in more wiring and complications but i find that but diodes work just as well.

    This catches a lot go guys who put late model injected motors into older cars.
    Last edited by carcrazy; 19-02-12 at 07:35 PM.
    Quote Originally Posted by Einstein
    The definition of insanity is repeating the same action and expecting a different result

  3. #63
    Grumble bum 68RNR's Avatar
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    Mate very interesting information there. I was thinking it might have been cutting ignition feed on cranking, but then was thinking why the hell would that happen? I have a brand new wiring loom in it, but of course an original ignition barrel....
    I thought of running 12v from the starter relay as well, but then I thought that the starter relay would get the continuous 12v ignition feed too and the starter would be on all the time (bad obviously)...

    Another solution I thought of was to install a switch and push button start. That way I can just have the key for security (somehow...) and have a flick switch for ignition and a push button for the starter or similar. Might be a win?

  4. #64
    Opens HoonBoy's Avatar
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    It was to bypass the ballast resistor and give the coil full voltage on cranking. Heaps of ways to get around it, I joined the cranking and ign on wires with a diode to stop the voltage flowing back to the starter solenoid.

  5. #65
    Grumble bum 68RNR's Avatar
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    Makes sense mate, thanks heaps for the heads up! I'll grab a diode from Jaycar and hook her up

  6. #66
    Loving teh titties.. carcrazy's Avatar
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    Get one that can handle some current, not the small little guys that are used circuit boards.
    Quote Originally Posted by Einstein
    The definition of insanity is repeating the same action and expecting a different result

  7. #67
    Grumble bum 68RNR's Avatar
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    Assume Jaycar would have something like that??
    Be neater than a push button and some switches I guess

  8. #68
    Opens HoonBoy's Avatar
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    Yeah, just ask the nerds behind the counter for a 12 volt diode and explain away if needed. They are generally pretty good at that stuff.

  9. #69
    Grumble bum 68RNR's Avatar
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    Assume Jaycar would have something like that??
    Be neater than a push button and some switches I guess

  10. #70
    Opens HoonBoy's Avatar
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    Yeah, just ask the nerds behind the counter for a 12 volt diode and explain away if needed. They are generally pretty good at that stuff.

  11. #71
    Non Compos Mentos Gammaboy's Avatar
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    Glitch in the matrix?

  12. #72
    Registered User Stix Zadinia's Avatar
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    Glitch in the matrix?

  13. #73
    Opens HoonBoy's Avatar
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    Yeah, just ask the nerds behind the counter for a matrix glitch fixer and explain away if needed. They are generally pretty good at that stuff.

  14. #74
    Registered User darwinschops's Avatar
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    Quote Originally Posted by 68RNR View Post
    ...time to do something about the body work and the front suspension. Car was handling something like a bastard child of a cement truck and a shopping trolley.
    Quote Originally Posted by 68RNR View Post
    pissing like a cow on a flat rock... caved in like a wuss and gave it a paint job...
    hah. and fucking. jesus. nice car.

    have just started looking into the world of chargers, challengers, 'cudas, gtx's and roadrunners. those 6 pack scoops mess up the lines a bit but supercharger and big fucking big block is just so unspeakably awesome... very nice cars, another muscle car to add to the want list is just what i need...
    Last edited by darwinschops; 20-02-12 at 10:57 PM.

  15. #75
    Registered User Dudeman's Avatar
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    I used to drive past a very tidy gold Satellite cruiser in Sydney, it went up for sale, disappeared for a short while then reappeared on the guys lawn with a spiel painted on the windscreen explaining that the rear bumper was next to the diff thanks to a drunk female driver and it wasn't his fault. Was a fucking nice car before then.

  16. #76
    Grumble bum 68RNR's Avatar
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    Oh man wouldnt that make you cry. Spending all that time and money to restore a vintage car, and some cretin writes it off for you... Bloody hell!
    And thanks Darwins Glad you like it! I am really keen to get it on the road now, just a couple of little bits to do and she should be just about ready for roadworthy! Just waiting on my new radiator and its gonna' be burnout time! Until the gearbox shits itself at least...

    Got a quote from Brinks down south to rebuild the box, so I guess thats the next on the list

  17. #77
    Registered User Mr Purple's Avatar
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    Love these things, will justify it one day!

    The problem is you can fit both a Mini and a Caterham in their garage footprint...

  18. #78
    Registered User irsa76's Avatar
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    Quote Originally Posted by Mr Purple View Post
    Love these things, will justify it one day!

    The problem is you can fit both a Mini and a Caterham in their garage footprint...
    Nah, this is the "intermediate"!
    The Royal Monaco, OK it's a Dodge, is bigger again. Iirc the top Chryslers were even bigger, they really needed the 440.

  19. #79
    Registered User Mr Purple's Avatar
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    I have a Valiant about the same size. It's more a width issue!

  20. #80
    Grumble bum 68RNR's Avatar
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    It is indeed a land yacht of sorts. My mate has a Lotus Elite, I rekon it could fit in the boot..
    On the up side they arent as heavy as they look. Apparently only 1.5 tonnes. Thats less than a new XR6! And twice as delicious!!

    In other news, got a heap of work done on the rig today!! Fixed my ignition problem with a $2 diode from Jaycar (THanks CarCrazy YOU THE FUCKIN MAN!).
    So now the wiring is finished, dash is back together, front seats back in, engine bay tidy, all ready to rock! I will post a couple of photos of the finished interior. Still needs headliner and a few bits, and a back seat but you get the idea.

    Latest is that my "One Wire Internally Regulated Alternator" is in fact a "Multi-wire Externally Regulated Alternator". So, therefore the wrong alternator. So now I gotta get a different one and sell it off. Brand new, shiney and chrome. Not sure what its for though if its externally regulated?? BAH!

    Will post a couple of pics.

  21. #81
    Grumble bum 68RNR's Avatar
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    Ok so excuse the shitness of the pics (taken at night time with iPhone...)


  22. #82
    Grumble bum 68RNR's Avatar
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    Ok so got some more work done today on the beast. Decided the battery relocation kit from Summit wasnt what I wanted, didnt like the battery box much and the way it was bolted in, so I pissed it off and stuck a Moroso one in instead! Looks a billion times better. Also got some carpet from Clark rubber and did the boot. Rekon its starting to look pretty respectable!
    All things considered I should be able to take it down the street tomorrow to test if my brakes and everything are working properly!!


  23. #83
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  24. #84
    Hooroo! Nitephyre's Avatar
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    Fuck me sideways, this is hawt

    | 1963 RK43 Toyota Lite-Stout (Stanley) | 2002 EC5W Mitsubishi Legnum VR-4 Type-S (Larry) |

    Quote Originally Posted by Gammaboy View Post
    PF - We're not happy till you're not happy.

  25. #85
    Grumble bum 68RNR's Avatar
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    Right! So time for update!
    I got the beast out on the road on Friday for its maiden voyage!!! Not rego'd yet, so just did a lap up the street and back.
    So, results of that were that the tranny is leaking a shitload of ATF, as a result the torque converter wouldnt engage properly and it just revved alot. So looks like the box is coming out sooner rather than later.
    Secondly when I wound the window down the door opened. Shit. So the window was catching on the rod between the door handle and the latch. Fixed that right up today.

    There is still a clunk in the steering/suspension somewhere I will need to investigate, something might just need tightening up, not sure. Seemed to come on under brakes so might be the lower control arms.
    Also the brakes work but are spongy and shit so looks like i need to bleed them again.

    All in all a big success, given thats the first time its run since I bought it. Neighbours werent impressed with the side-pipes and no mufflers... Oh well.

  26. #86
    Grumble bum 68RNR's Avatar
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    Hmmm, so tried to maiden it again after putting some more ATF in the tranny. Seemed to work much better, but when I get the engine under load and try to give it some it does a *Cough* and misses....
    Weird.
    If you rev it in neutral, nothing wrong and it revs out nicely. As soon as its under load, I cant get it over about 1/4 throttle. Dunno wtf is going on now. BAH!

    Thoughts?

    Also noticed my MSD 6AL is mounted up on the firewall and is getting pretty hot. It sits right above the headers. Maybe this is a bad thing and I should move it someplace else?

  27. #87
    Grumble bum 68RNR's Avatar
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    Right so it looks like the timing was out and the carby wasnt tuned right. Sorted that shit out and now its running nice. Should have thought of that before I think...

  28. #88
    Grumble bum 68RNR's Avatar
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    Righto so its been a while since i updated this as the car has been down on the sunny coast and I have moved to Central Queensland for work! Anyway, took a car trailer down to a few weeks and picked the beast up:


    So this weekend it was time to finally pull the old 383 out. Gearbox has been leaking really bad ever since I bought it and needs a rebuild anyway, so decided to rip the whole affair out. Sold the 383 to a bloke from Brissy to help finance the new 522ci crate motor! Will also give me a chance to clean up the engine bay and make it look awesome!
    Disconnected all the bits and pieces and had it ready for the engine hoist:


    My mate mick looking like he knows what he's doing:


    Mick disconnecting some shit (headers I think):


    So we unbolted all the headers and whatnot, but couldnt get them out with the motor in place, so we just had them loose. I also dropped the pitman arm and idler off so the steering arm wouldnt catch on the gearbox. Disconnected all the gearbox crap and pulled the pins out of the motor mounts. Funny thing, one mount wasnt even bolted to the motor.... just sat there. Scary...

    Actual removal was a piece of piss. Whole thing came out in a jiffy:


    And walla:


    So next jobs on the list:
    Send gearbox to Brinks for full overhaul and shiny-making
    Order new headers for the crate motor
    install my flash new 3 row alloy rad and thermos YES!
    Fit up the new fiberglass 6-pack hood
    Spend a shitload of money and order the new motor!

    While I wait for finance I will clean all the crud off the crossmember and engine bay and go nuts with the spray can.

    Thats it for now, gonna have a crack at the engine bay tomorrow!

  29. #89
    Registered User Mr Purple's Avatar
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    Sweet!

    Funny how the engine bay of these looks identical to the Oz Valiants.

    Where are you sourcing your engine? There's so many bloody options!

  30. #90
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    Not identical, not even close really.

    Good to see you found a buyer for the 383.

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