650+HP BBc

[VintageMusclecar]

To put this in comparison, Mark Jones' 700 HP <span style="font-weight: bold">496</span> <span style="text-decoration: underline">oval port</span> motors are only making 675 lb.ft of torque, which is 1.36 lb.ft per cubic inch. Mark is arguably one of the best Big Block Chevy builders in the country, and his engines back the dyno #'s up at the track (when the car they reside in is dialed in of course).

Sorry, but 730 lb.ft out of a 468 at only 4800 rpm on pump gas is more than a little hard to believe. I would be looking VERY hard at the dyno calibration.

Here's a little something to consider from an elite engine builder, Darin Morgan of Reher &amp; Morrison:

From Yellowbullet:

<span style="font-style: italic">&quot;I have looked through this thread and never saw an answer to your question regarding MAX ft/lbs per-cid. For gasoline engines the max is 1.67ft/lbs per-cid. If anyone tells you they are making more, they are fibbing to you. That equates to about 120% to 124% volumetric efficiency &quot; Trapped&quot; which is where Pro Stock and Comp engines have been at for the last 20+ years. P/S and Comp engines all make about 1.65ft/lbs per-cid. The game is to raise that peak TQ to higher an higher engine speeds creating more HP.

Here is another fact. A good engine will only fall 50ft/lbs from peak TQ to peak power. Bracket engines that make about 1.45ft/lbs per-cid all fall about 60 ft/lbs from Tq peak to power peak over there power band. If they fall more than that it indicates a problem in the tuning or the engines design or combination.'</span>

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Not trying to be a dick, but the numbers just do not add up (no pun intended).