Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?

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    Author Topic: Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?  (Read 7814 times)

    Offline Husker Cuda

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    Re: Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?
    « Reply #30 on: May 23, 2008 - 07:57:43 PM »
    You are correct Stroker, engine Dyno and I'm not sure why they quite pulling at 5,800.  I would think it would make a little more HP up to around 6,200 or so.  Would the larger carb kill torque and make more HP?  I know the unported heads are hurting the numbers as well.  What Cam do you all think would be best for this build?
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    1974 'Cuda 512 stroker 650HP Indy heads, Hemi 4 speed, pistol grip - restored to new.
    1970 GTX 440/727 Y4 Gold w/ black interior
    1969 Camaro SS 396 4-speed X22
    1970 Chevelle SS 396 - 375HP M22 4 speed


    nivvy

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    Re: Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?
    « Reply #31 on: May 24, 2008 - 03:54:44 AM »
    the dyno sheet shows stop pulling at 5200........ Solid Roller cam is the only way to go.............  :2cents:

    .513/.530 - that is before lash setting .....

    I agree bigger carb / more timing.......

    but if thats all you really wanted than thats fine what you got........ I just think after a month you'll want more.........  :bigsmile:
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    Offline Chryco Psycho

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    Re: Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?
    « Reply #32 on: May 25, 2008 - 01:57:04 AM »
    I use some killer sloid flat tappet grinds with specs similar to street roller cams , something in the 245* @ .050 /570 lift range
     the larger carb will help virtually everywhere or at least not hurt the power in the low - midrange
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    Challenger - You`ll wish You Hadn`t

    Offline moper

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    Re: Neil Why The 512 Kit and Not the 528 or 543 Kit From 440source.com?
    « Reply #33 on: May 27, 2008 - 12:40:22 PM »
    The last 505 I built has a solid flat tappet about 280°@.050 dur on intake, and 298@.050 dur exh on it, and touching .600 lift. It idles clean and at about 950rpm and is not designed for mad horsepower. The cam that was spec'd for yours is way too small, as is the carb. Look for at least 230°@.050 if you run power brakes. If you dont, I would start looking at cmas in the .550 lift range, with at least 250°@.050 on them. It's not the heads, it's the cam and carb.
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