Volvo RWD 120-130 Forum

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Timing Question - No Start - HELP!?!?!?! 120-130 1967

posted by  Nathan Courtright on  Tue Aug 9 22:46 CST 2011
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last visit: Sun Jul 7 23:45 CST 2013
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Hey guys,

I'm having a hard time getting my 122 to fire now that "Franken-motor" has been installed. B20E block/head bored to 2130cc. Block shaved .028. Head shaved .040. Isky Cam .480 lift, 310 duration. Twin 2bbl Mikuni-Solex PHH40 carbs (think DCOE). 2.75" exhaust header. Cometic MLS headgasket. Crane Fireball XR700 igntion. Mallory Pro Master Classic coil. Electric fuel pump set to 3.5PSI.

Now that I'm done bragging....


I'm getting fuel to the floats. You can smell/feel fuel on the plugs when I've pulled them. I know I am getting spark (verified by pulling plug and grounding to car). I'm just not getting it timed right to get it to ignite the fuel. Any suggestions for setting the timing would be VERY greatly appreciated.

Thanks!

Nate Courtright








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    Timing Question - No Start - HELP!?!?!?! 120-130 1967

    posted by  Phil S. on  Wed Aug 10 18:18 CST 2011
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    last visit: Fri Oct 24 13:18 CST 2014
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    Turn the engine to 10 BTDC, or whatever you want the static timing to be.

    Verify that you have some slack in both front rockers, and that the distributor rotor is pointing to the front plug wire. If you have slack in both back rockers and it's pointing to the #1 plug, or if it points to #4 plug with slack in the front rockers, the distributor drive gear is installed 180 degrees out (this is a very easy trap to fall into).

    If this is all correct, hook a timing light onto #1 plug wire, crank the engine, and see what the timing is. Adjust accordingly.








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      Timing Question - No Start - HELP!?!?!?! 120-130 1967

      posted by  MrBob on  Tue Aug 30 12:17 CST 2011
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      last visit: Sat Feb 4 12:53 CST 2012
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      Make certain that your plug wires are where they belong and take Phils advice for timing before looking for more complex answers. He describes what I did to get my newly overhauled motor to fire.








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    Timing Question - No Start - HELP!?!?!?! 120-130 1967

    posted by  KlausC on  Wed Aug 10 10:31 CST 2011
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    I like what you did, except for the needless electric fuel pump.

    I would check the timing by pulling all of the plugs, crank the engine so #1 is at bottom, turn the ignition to on, ground #1 plug, and crank the engine until you see a spark. It should be 10-15 degrees BTDC.

    Did you oil the rings? Without oil, your compression could be close to zero.

    Klaus
    --
    1967 220 belonging to C.A. lives on








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      Timing Question - No Start - HELP!?!?!?! 120-130 1967

      posted by  Phil S. on  Wed Aug 10 18:14 CST 2011
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      last visit: Fri Oct 24 13:18 CST 2014
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      I like what you did, except for the needless electric fuel pump.

      That engine has the potential of outrunning the mechanical fuel pump. I've built a few that will.








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    Timing Question - No Start - HELP!?!?!?! 120-130 1967

    posted by  Volvo From Heck on  Wed Aug 10 05:48 CST 2011
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    last visit: Mon Oct 13 20:56 CST 2014
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    Perhaps you (or the builder) overlooked the fact that he camshaft gear timing marks are set for TDC #4 cylinder (closest to the flywheel--French engine style) -- not #1. You may have to just move wires around on the distributor cap 180 degrees. -- Dave








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      Timing Question - No Start - HELP!?!?!?! 120-130 1967

      posted by  Nathan Courtright on  Wed Aug 10 09:56 CST 2011
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      last visit: Sun Jul 7 23:45 CST 2013
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      Tried swapping the plug wires around. No change. I'm pretty sure I had it on right, but I figured it was worth a shot. I'm starting to wonder if I'm getting a correct amount of fuel. Is there a way to check how much fuel is being put into the motor? I'm wondering if I've got a clogged jet or something - is this possible?

      Is there anybody on here who has experience with the mikuni? They're practically a clone of the DCOE Weber.


      Thanks-

      Nate Courtright








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        Timing Question - No Start - HELP!?!?!?! 120-130 1967

        uid 4433's pic
        posted by  patrick of montreal on  Wed Aug 10 16:33 CST 2011
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        last visit: Sat Oct 18 08:25 CST 2014
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        unless your fuel is crazy out you should be getting at least t some hits....Too many times I have seen guys scratching their heads for days because they got the wires wrong....but first...you do have spark when you crank? ie you pull the main lead from the dizzy, put it close to a good ground, run the starter and you get lots of good healthy sparking? If yes, really go to the basics on your timing, the firing order etc.... a real back to basics re TDC on #1, direction the engine rotates, and the direction the dizzy turns, and which cyl fires next. Personally I have always been super careful not to mix it up, but with all the new stuff you have installed it is easy to get something backwards.
        --
        Patrick, '68 220 (used to drive 240s)







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