trick flow 170 cc, i think 10:1..not sure. I tried another cam from Lunati... 290/300 .544/.560 and thought it was too aggressive...didnt like the rough idle. Lunati then recomended the 272/280 for EFI apps. I like the sound of the engine much better with the new cam. When you say "small", what do you mean? This cam stuff is new to me.