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Thread: Need a little help w/my blower motor Timing

  1. #1
    retromek
    I've built my first Blower motor had it out on the lake and river.
    1st trip ran excellent, 2nd trip the magneto moved and a few other bolts here and there came loose. Pulled the engine out last week all is good.
    1st question:
    I forgot what curve I had installed in the mag.
    2nd question
    What timing should I be running.
    The build is not too fancy....
    496,
    2 bolt main
    Arp studs on mains and the head
    Oval port heads
    Kuhl 6-71
    twin edelbrocks
    Ronco mag/w externall coil
    JE/SRP pistons
    Carrillo rods
    Steel crank
    Bump stick is an ISKY #396286
    Thanks

  2. #2
    TIMINATOR
    Lock out the advance, and time to 32 deg to start with, read the plugs and advance from there. It MAY want as much as 38-40 deg, or not. Take that in SMALL steps! Note: just because the timing is locked out don't try to time it at idle! Take it to 3000 or so because the cam twists, timing chain stretches, and dist drive gear has slack too. I don't run Isky cams (lots of reasons) so post the .050 duration, lift, etc. You can get into a LOT of trouble with the AFBs if untouched, give us more info. TIMINATOR

  3. #3
    retromek
    here's the specs on the cam. Stock lifters, went with the springs the cam called for and put the thicker push rods in w/guide plates.
    1st set of plugs looked good to me, but i was running VP / premium pump mixed at 50/50
    Its a Hyd
    Cam lift .291
    vlv lift .510
    Dur 286
    050 dur 244
    lobe center 108
    @ .006 lifter rise
    Intake
    open @BTDC 35
    Closed @ ABDC 71
    exhaust
    open @ BBDC 71
    Closed @ ATDC 35
    hope this helps. I built it to drive it and learn to drive the boat w/it. it hits @ 3000rpm when its on and I can't look at the gauges anymore.
    Thanks for the help

  4. #4
    TIMINATOR
    Sorry, but the cam isn't a good choice for your combo. You have a few other issues to deal with too. The fastest way is to call me at 623-877-8553 during business hrs. We are in the west phx,az. area. We are a machineshop and do quite a few blower engines. TIMINATOR

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