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Those are the @0.050" figures, overlap at advertised duration is 58*.

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If you read the Comp Cams spec page correctly the valve events are @ .006" lift
EVC @ 1º ATDC and IVO @ 6º BTDC

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The 7 degrees overlap is at 0.050", not 0.006". The advertised numbers are at 0.006" and the overlap is 58 degrees.

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Impressive numbers. One thing I do not understand: The streetHemi with all the good parts inside made 490 in torque, the 440 magnum had 480, some GM 455 engines had around 500, this was SAE in the 70's (Which were known to be optimistic). Then this example is 20% more in dynoed torque, at almost the same swept volume and a tad more CR. Can it be correct? What have I missed? Are the Stealths like supercharging an engine? Do the 451 light weight pistons matter at 2000 rpms? Please explain, I am really interested in how this can be done, as a 523 stroker I built some years ago with 11,7:1, 590 cam, M1 intake + 1050, and ported St6 heads barely made 600 lbsft. I am building a 400 stroker for my driver with 6 speed manual transmission, and will try to aim for some mileage as our gas is on the world's cost peak.....
Thanks,
Oyvind Mopar

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Your ridiculously high torque figures sound like you got your dyno results from the magical fantasy land of Desktop Dyno.

There isn't a pump gas naturally aspirated stock 3.75 stroke big block mopar on the planet that will pound out 600 ft.lbs over a 2000 rpm spread like you claim.

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You guys aren't reading it right. The OP states that his 451 generates 600 ft/lbs from 2000 rpm to 4000 rpm! It's not the actual torque number--a VERY well scienced out 451 can do that-just NOT at 2000 rpm. But whatever I'd take a ride in it. J.Rob

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Exactly

600 ft lbs from a 6 pack 451 on pump gas has already been done, local shops here have done it about a decade or so ago....it's well known and not really a big deal.

But certainly not at 2000 rpm, and certainly not with a 2 barrel....

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Well I for one believe it is possible. I have gone 584 lb-ft at 5000 rpm to 583 lb-ft at 6900 rpm with a peak of 604 lb-ft at 6100 rpm using a pump gas 451 stroker. It'll give 500 lb-ft for a 4000 rpm range, from 3500 rpm to 7500 rpm. You're right it isn't 600, but it's close enough for me to believe someone better'n me could do it.

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You experts need to get a life. He's trying to share his build and you folks are acting like he has done something wrong. He had a nice combo that makes good power and good milage and all you experts keep harking on is the 600tq at 2000 rpm. It makes you all look like tools.
Everyone on here knows that's optimistic as the peak tq. for that combo but you feel you must give your expert opinions ha ha.
How bout you try to work on your cars instead of your post counts! ha ha ha

OP. nice combo, I would like to see some pics of the car. Them old chargers are some of the best looking MoPars made.

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If you notice I never said anything bad about his combo
and I have something close to it in my 38 Ply but I
havent driven it yet... so I'm curious about the torque
curve.... I could care less if its off but I would
like to see how flat it is

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You experts need to get a life. He's trying to share his build and you folks are acting like he has done something wrong. He had a nice combo that makes good power and good milage and all you experts keep harking on is the 600tq at 2000 rpm. It makes you all look like tools.
Everyone on here knows that's optimistic as the peak tq. for that combo but you feel you must give your expert opinions ha ha.
How bout you try to work on your cars instead of your post counts! ha ha ha

OP. nice combo, I would like to see some pics of the car. Them old chargers are some of the best looking MoPars made.

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