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Don't forget that big C.I. motors eat big duration cams and need big air into and out of them

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Something around 265-270 at 0.050" cam and 0.600" lift would be streetable at 512 CID. CR depends, but 11.0 should be safe with aluminum heads, and the right setup (quench, duration, ignition curve, etc) could push 12.0 CR; but that can get touchy.

Check on that 4200 converter. If that was the stall with 440 CID, it will stall higher at 512.

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I ran a 10.5-1 512 with Stage 6 heads, indy dual plane, 950 carb and a 238 @.050/.540 Solid flat tappet through exhaust manifolds and it went 11.55 at 117 at 3800lbs. Although your engine might like more cam, I think the .557 would work fine and should be extremely nice on the street.

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Again, no dissrespect but 11`s w/ a big 512 doesn`t cut it.....my daily driven stock stroke iron headed solid cammed 360 went 11.80`s-12.0`s at l.a.c.r. I expect MUCH more out of the strokers but, if you`re happy that`s all that really matters.

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For a street/strip engine you don’t need a lot of lift. I have the below cam in my 511 wedge and it is a hand full on the street. Compression is 10.5, with out of the box Indy EZ heads. Tons of low end torque. I would think your .557 would work in a 512. My 511 runs 11.74 in the ¼ mile in a 69 Super Bee and that’s with P/S, P/B, A/C and full interior.

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I ran a 10.5-1 512 with Stage 6 heads, indy dual plane, 950 carb and a 238 @.050/.540 Solid flat tappet through exhaust manifolds and it went 11.55 at 117 at 3800lbs. Although your engine might like more cam, I think the .557 would work fine and should be extremely nice on the street.

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Again, no dissrespect but 11`s w/ a big 512 doesn`t cut it.....my daily driven stock stroke iron headed solid cammed 360 went 11.80`s-12.0`s at l.a.c.r. I expect MUCH more out of the strokers but, if you`re happy that`s all that really matters.

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I ran a 10.5-1 512 with Stage 6 heads, indy dual plane, 950 carb and a 238 @.050/.540 Solid flat tappet through exhaust manifolds and it went 11.55 at 117 at 3800lbs. Although your engine might like more cam, I think the .557 would work fine and should be extremely nice on the street.


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Again, no dissrespect but 11`s w/ a big 512 doesn`t cut it.....my daily driven stock stroke iron headed solid cammed 360 went 11.80`s-12.0`s at l.a.c.r. I expect MUCH more out of the strokers but, if you`re happy that`s all that really matters.

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My 69 Bee is primarily a street car. That’s why I put the Gear Venders in it and kept the AC and all the power stuff. I’m happy with it running 11’s on the occasional trip to the track. If I want to go faster I take my RED to the strip and run 8.0’s all day.

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I ran a 10.5-1 512 with Stage 6 heads, indy dual plane, 950 carb and a 238 @.050/.540 Solid flat tappet through exhaust manifolds and it went 11.55 at 117 at 3800lbs. Although your engine might like more cam, I think the .557 would work fine and should be extremely nice on the street.

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Again, no dissrespect but 11`s w/ a big 512 doesn`t cut it.....my daily driven stock stroke iron headed solid cammed 360 went 11.80`s-12.0`s at l.a.c.r. I expect MUCH more out of the strokers but, if you`re happy that`s all that really matters.

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