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Thread: injected alcohol timing

  1. #1

    injected alcohol timing

    Hello I have an alcohol injected 496 bbc with enderle bird that we're trying to get tuned then add nitrous too. When we started it with the timing light on it the thing wouldn't run without 45 degrees of timing in it. Is this even possible or do i have a problem somewhere.It sounds good and throttle response is good. Thanks for any help Terry

  2. #2
    Member JUNIOR BUILDER
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    Depends on many variables. What are you using for a harmonic balancer? What do you have for compression?

  3. #3
    its an 8 in fluidamper 15 to 1 j&e pistons mallory ignition eagle rods and crank. I also am a mud racer so if u dont mind me asking what gears do you run. I have a 488 in the rear with 44in tire and 456 front with a 40 in tire. So far I've had trouble gettong this motor to come up on rpm like thats too high of a gear. It runs 1 to 1 thru a chain drive. I havn't ran it with the nos yet just motor. Any help would be greatly appreciated

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    Senior Member RACING JUNKIE curtisreed's Avatar
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    The first thing I thought of was have you verified that your pointer is at top dead center?

    Curtis

  5. #5
    Senior Member MASTER BUILDER
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    What timing light are you using, I am not familar with Mallory ignition, but MSD ignition will mess with certain timing lights.

    As far as the gear, in my opinion thats way too high, with a nos engine I always shoot for around 11.50-1 ration in first gear. What trans and what is the gear ratio in fisst gear.

  6. #6
    Yes I just put a brand new tab on it the key is not sheared off i checked that too. And im not sure about the timing light its nothing special just an ordinary off the shelf one. As far as the gearing its a glide with a 1.76 low gear

  7. #7
    Senior Member MASTER BUILDER
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    We had the same deal on a MSD setup. The tech guy told me to reverse the signal wires and then check it. It seems sometimes they ship them with the wires being put in the wrong side of the connector.
    Al

  8. #8
    Senior Member MASTER BUILDER
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    Quote Originally Posted by altune
    We had the same deal on a MSD setup. The tech guy told me to reverse the signal wires and then check it. It seems sometimes they ship them with the wires being put in the wrong side of the connector.
    Al
    I agree it could be the purple and green wires need to be reversed. I had one do that one time, reversed the wires and fixed it.

    On the gear ratio, for 200' mud drags its just about impossible to get too low of a gear ratio. A 6.00 gear would get you to a 11.44-1 ratio in low gear. The front is the tricky one, with a 40" tire on front I would probably try to get around a 5.50 ratio in the front, this should be able to be corrected in the sprocket arrangment to the front driveshaft, without changing ring and pinion.

  9. #9
    Member JUNIOR BUILDER
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    As far as timing is concerned 45 degrees on alcohol is not unheard of but its rare. I would tend to think that there is somthing wrong, maybe pointer, maybe cam timing, wrong converter. What is your convertor rated for.

    The guys were right about the timing lights too. There has been may problems linked back to timing lights. I had a problem with one just recently. Drove me nuts.

    I have 4.88's in my car as well with 44's on the rear and its 1-1 thru a chaindrive to the front. I have a 5600 stall converter and I turn my 632 to 8000 using only first and second gear. I don't think that the gears are your problem.

  10. #10
    Member JUNIOR BUILDER
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    Also is this fuel injection unit new? If so you could be running too rich.


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