Darton's are running up 4.2 bore now(457 Cid on the LS1/6), and are also used open wheel race cars, exclusively with Top Fuel/Funny cars(7,000-8,000 h.p.), about every major engine builder and even aircraft engines.
I am about to do a 250 shot(direct port) on mine or about 850 rear wheel torque. Mine you, I will run a dedicated fuel system. Run lean on nitrous, blower, TT, or even N/a anything will die and quickly.
Like anything, depends on who puts it together. One internal mistake on most any motor, your just screwed.
They would be correct in saying the first ones had problems and the C5R was developed first at this size stroke/bore. Frankly, I am disappointed now I stopped at 430 CID..I would rather have 457 Cid. I road race mine, with no problem.
:screwy:
The next LS7 block should even be better. Dry sump is cool, extra 20-30 h.p..
Everything evolves with time. In the next decade, your grandmother's 90 cid., 800 r.w.h.p. turbine, all wheel drive, varible transmission car will run nines and shoot fire and lightening out of its ....