Trick Flow 240...

?? 451 x 2 h.p. = broken block if hammered often
500c.i. 440 , x 2 =1000 h.p. another broken block !
I think you misread his reply Bob, he said cfm not ci so 240 x 2 = 480hp. :thumbsup:
Neil.
Ps assuming 240 refers to cfm