The block is more limited to HP than boost. Once you hit 450-470 at the wheels, you start reaching the limits of the fuel system. There are guys running 17-18psi, and I know of atleast one that was pushing 20psi(but for how long?) on stock block...I am all about safety for the motor....ludeamister said:i want to see your new times... yea twins screw='s the best... how much boost can a lightning take stock?
Your way off base here.ReyKe said:umm its not boost, it's more power threshold, than anything else I think Johny Lightning Perfomance was able to crank out 600+ from just boltons to the shortblock. But honestly a kenne bell at 13 pounds and that's all your making. You really need more supporting upgrades. But then again Screw type blowers, IMO are hugely inefficient. Such high intake temps. You migt seriously want to look into methanol Injection from Snow Performance, or other related companies.