Motor Daddy wrote:Clint, I'm not exactly sure what you are saying, but I think I still disagree.
If both the 400 and 455 line up at the light (same weight), no matter what the launch RPM is on the 455, the 400 can adjust its launch point accordingly and have more rear wheel torque at launch. The car that has the greatest rear wheel torque will accelerate at the greatest rate from a dead stop, regardless of the "streetability" or classification of the engine, or what the torque is at the flywheel. Rear wheel torque is KING when comparing acceleration rates at MPH!
Actually the statement was totally
removed from the 400 vs. 455 issue.
In a nutshell what I am saying is if you have two 500 HP engines which are making 500 HP at 20 mph (towing), then the one with the towing torque curve (i.e big diesel) will make for example 150 HP at 4 mph and the one with the race engine torque curve (8000 rpm 302 or whatever) will make 80 HP at 4 mph. Both engines must make the same peak HP as they must
pull to 20 mph. The one with the most bottom end power will make the most RWTQ from a stop and will pull away from the stop the easiest, etc. Of course you could always rev up the race engine and drop the clutch, spin the tires etc. but this was meant to be a practical towing example. The statement has nothing
to do with the 400 vs. 455, but is related to someone's twist which got into towing.
Now if the example was about 2 engines with different HP
, or towing speeds that were not fixed, that would be a different story altogether.
TFX Engine Technology Inc.
(Combustion Pressure Analyzers)