422 dyno fail

Brooks James said

If you were hoping for bigger numbers, based on 340 to 422, I saw a Dyno test where a 360 mag was stroked to 408, stroker kit only, all else the same. it only raised the hp 34 hp. Loosely, using a ratio, 340 to 422 would give about 54 hp. Put a 150 shot of nitrous on it.

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A video of “HotRod TV” perhaps?

What they did there on that video was just simply changed the rotating assembly from the OEM 5.9 to the 4.00 arm crank and pistons. The limitations on hp were due to nothing being changed except the rotating assembly. Stock cam, heads, etc…
from the base test pull they did.

The main pull you or anyone should have taken from that video is the stroker kit added on a lot of torque.

Adding high performance street parts or stepping up to racing intakes and big cams with aluminum heads, your still going to see the big torque gain along with the increased hp, but in a direct apples to orange comparison of a stock 360 to 408, the maximum hp achieved will show earlier on the stroker (or should!) and may not be such a huge divide on hp vs the torque.

It’s all build dependent.