Will connecting two shop vacuums in parallel double the power?

I need a shop vac with more suction. I have one that moves air at 200 cfm. The water lift is reportedly 80". The exhaust is the same 2.5" port as the input. If I get a second vacuum attach it to the first vacuum's exhaust, will this effectively double my power? If not, how much of an increase can I expect? Thanks.