Lets look at the Centurion and the Cataphract. With a 250 Engine a Centurion has 26.5 tons for weapons and armor for 81 kph. Not possible in the current game but a Cataphract would need a 350 Engine to match that giving it 27 tons for weapons and armor. Only half a ton more for a 20 ton heavier mech.
Now with Speed Tweak I can drop engine size to go just as fast. 230 Engine + 1 Required Heat Sink in the Centurion gives me 28.5 tons to play with at 82 kph. The Cataphract by comparison with a 320 Engine gives 33.5 tons for 81.5 kph, or a 325 Engine gives 32.5 tons for 82.7 kph.
Speed Tweak allows that heavier mech to be even more efficient than it should be throwing off the balance. From only having a .5 ton advantage with somewhat more Internal Structure to a 4 to 5 ton difference.
We can also look at this another way. 35 tonner versus 50 tonner at 113 kph.
35 tonner has 14.5 tons to use for weapons and armor without Speed Tweak, 16.5 tons with at 114.6 plus you have to add a heat sink to the chassis for 15.5 tons to use.
50 tonner has 8.5 tons to use for weapons and armor without Speed Tweak, 16.5 tons with at 112.3.
Edited by Sturmforge, 19 May 2013 - 04:25 PM.