Exactly, forget all the cfm formulas for anything racey...yes faster with 850 than 750 and everyone in the class I ran in said my carb was too big. Even a guy that ran a Rover 3500cc V8 put my 850 on and ran 2/10tnths faster, he couldn't believe it, were talking 215ci but it was astick car and he revved it to the moon.