Unfortunately i can't answer that as no one runs those engines where i race. I can tell you that the d3r can keep up with a mega zx12, rb v12 as those are what most guys race at the track. I have a g4s and i had to add 1 tooth on each pinion as the d3r is an engine with torque but not high revs.
One guy where i race runs the d12x and it's very fast. I've been seeing the d12ex and the price is dirt cheap. Just wondering what it can do.