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Thread: Cam specs

  1. #1
    Registered User grannyknot's Avatar
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    Default Cam specs

    I bought a used (15,000 Km) performance L28 a while back and just got the cam specification card.
    I was told it was a "hot" cam, can you guys confirm that?
    It is not a Crane cam but a Nissan one that was reground to Crane specs by a good shop.
    Thanks
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    1970 240Z HLS30 01955 March/70

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    Registered User LeonV's Avatar
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    Default

    That's a pretty "mild" cam. It has a bit more lift and duration than stock but nothing dramatic. It would probably get you a little bit more top end without sacrificing mid-range and idle. I bet it wouldn't change the engine's behavior much at all. Looks like they kept the lift low enough to re-use the stock valve springs (EDIT: although for whatever reason, they say to only use the specified springs).
    Last edited by LeonV; 11-05-2012 at 04:42 PM.
    2/74 260Z

  3. #3
    Nova Scotia,Canada,Earth Blue's Avatar
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    Stock valve lift is ~ 0.41" the specs for that cam are 0.45" so ~ 10% more lift.

    Stock duration is ~ 240/248 degree, that cam is ~ 262/272 degrees so it will work better at higher RPM's.

    As LeonV said, it is not hot but it is better than stock.
    There is scarcely anything in the world that some man cannot make a little worse, and sell a little more cheaply.
    The person who buys on price alone is this man's lawful prey.


    John Ruskin (1819 - 1900)



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    Registered User EuroDat's Avatar
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    Its a mild "drivable" street cam. You would notice a small increase in power. I have one with a similar grind and it make for a good daily driver.
    See link for more general info on crane cams. http://datsunzgarage.com/engine/
    I tend to agree with his method of thought, but then again I don't race my car. I did know a guy using a "hot" cam and he was proud about it, but the car was a shocker to drive on the street under 4000rpm. Dam thing kept stalling and running rough. He never raced it so I never saw to point in it.
    Its not just a question of putting a cam in and driving it. Everything has to match or it wont work to full potential.

  5. #5
    Registered User grannyknot's Avatar
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    Thanks guys, it's not what the seller told me but it's not a bad thing either. The car will be a weekend fun car so driveability is probably more important than grunt. I have a feeling that these SK triple race carbs are going to be wasted on this car, but I'll give them a go first. I may keep them just for that induction sound.
    Chris
    1970 240Z HLS30 01955 March/70

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    Nova Scotia,Canada,Earth Blue's Avatar
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    Like I said... they are junk I'll give you a cam and a set of SU's for them whenever you want.
    There is scarcely anything in the world that some man cannot make a little worse, and sell a little more cheaply.
    The person who buys on price alone is this man's lawful prey.


    John Ruskin (1819 - 1900)



    ZCars in Eastern Canada seaport ready for shipment to Europe

    http://ZSportCanada.com


  7. #7
    Registered User grannyknot's Avatar
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    Quote Originally Posted by Blue View Post
    Like I said... they are junk I'll give you a cam and a set of SU's for them whenever you want.
    I don't know Blue, your 1st offer was a set of SU's now I get cam as well as SU's, how soon before I get cash?
    I'll give the SK's a fair shake but I have to admit I'm leaning towards Bruce's SU's (Z Therapy). If I do let them go I will
    call you first.
    Chris
    1970 240Z HLS30 01955 March/70

  8. #8
    Nova Scotia,Canada,Earth Blue's Avatar
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    Thanks!
    There is scarcely anything in the world that some man cannot make a little worse, and sell a little more cheaply.
    The person who buys on price alone is this man's lawful prey.


    John Ruskin (1819 - 1900)



    ZCars in Eastern Canada seaport ready for shipment to Europe

    http://ZSportCanada.com


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