I've seen A LOT of posts about making HP with a 318-So why is it so ???

I also ran the 440-6 through it..... it’s pretty close.
So, the DD2000 prediction vs reality for the 360 was...... it predicted both tq & hp higher than what the motor actually made.

The 440-6 is actually slightly better than what the DD predicts...... but pretty close.

And the next example is why I don’t really have any faith in what they spit out for numbers......
A very mild 505 with Ede heads.
It’s off 45hp...... and 80ft/lbs...... on the low side.
This program won’t give out good hp/tq if the head flow is low, or even low-ish...... relative to the size of the motor(which is most std port heads on a BB stroker).

360...DD is higher
440-6..... DD is close, but slightly lower
505....DD is 45hp & 80ft/lbs lower

I just modeled a mild 340 I did a while back....... it’s not way off...... DD shows 24ft/lbs and 10hp too high.

I’m not sure what’s going on with Toolmans DD where the TQ numbers are so high, and so low in the curve.