Whipple Charged:
picked up 70 hp from 11.8 to 13 with a 1471? Was that steady state? Thats pretty rare in a marine roots blower.
And, yes, you can pick up torque and not hp, not at the same rpm, thats not what I said, but at a lower rpm while not making much hp. To give you an example, figure the cost of 100+hp on that same engine with 13lbs. of boost, not to mention you can achive a higher psi before detonation because of the cooler air charges. Not only that, it doesn't vary over time, they last longer, smaller, more compact, quieter, etc.
There is no comparison, call up Littlefield, he has to run a screw compressor on the alcohol car that he runs because the roots is no wear near competitive, even though it has major rule advantages with weight and engine size.
Thanks,
Dustin