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Thread: timing issues?

  1. #1
    Registered User nathan 240k's Avatar
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    Default timing issues?

    hi guys ive just rebuilt my l28 and i have put a performance camshaft in it my qestion is how much will this change my timing i cant seem to get it to start and its seem to be a timing issue .all timing gear has been set to factory settings

  2. #2
    Registered User Lazeum's Avatar
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    Default

    You would need to change timing to get max power out of your new cam but it shouldn't allow you to start the engine.
    I would advice to check again.

    First, do you have sparks? are you sure gas is going through carbs?
    Then, I would check firing order to make sure it is ok, check also dizzy orientation at TDC.
    Check timing while cranking also if you can.
    Matt - 72' 240z

  3. #3
    Supporting Member Diseazd's Avatar
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    TDC on the compression stroke....
    http://www.flickr.com/photos/1404980...7600346077563/
    ______________________________________________
    http://www.flickr.com/photos/1404980...7603350695459/

    70, 71, 2 72's, and a 73 240z....
    90 300zx and a 1996 Acura NSX.....but who's counting?

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    Registered User madkaw's Avatar
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    Default

    You need to give us waaayyy more info then that.
    What's it doing?
    Spitting?
    Hitting but not starting ?
    Turn over easy?
    Like said above - sure its nothing else?
    Verified spark?
    Degree the cam?
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    Registered User Jeff G 78's Avatar
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    Default

    Like Steve said, we need way more info. The common mistake is to have the distributor 180 off, but it could be a lot of different things. Have you built a Z motor before> Did you start with a new chain and gears? Give us the build details and we'll help you.
    Jeff
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  6. #6
    Registered User nathan 240k's Avatar
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    its on tdc its not 180 out ive got spark and fuel all timing gear is new yes ive built l series engine,s in the past but not with a bigger cam.the car was just turning over when it did fire it back fired thou the exhaust and flamage out the carb

  7. #7
    Registered User madkaw's Avatar
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    Your going to have to do better with your post. I am struggling to read your run on sentences. I would love to help you, but I need to understand you.
    Have you degreed a cam before ?
    Did you have the timing cover off when you installed the new cam so you could count the sprocket teeth.
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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