Viper/Johnson V4 Performance


My name is Travis.  I own a 1985 Viper with a 1979 Johnson 140 crossflow.  I am currently running a 14x27 cleaver and running in the 71 to 72 mph range.  Do you think there would be a better prop to run? And what kind of rpm am I looking to turn, as I am turning 6000rpm right now. I am mainly looking for top end speed and am willing to dish some money for a good fast prop. What kind of speeds should I be looking for?  Any help would be greatly appreciated.  Thanks for your time.

Travis Selby



You are running pretty well already. Unfortunately, props for the V-4 in the 27-28 pitch range are hard to find. Call Performance Propeller in Soddy Daisy, TN and see if one of their new performers can be fit.




Please submit whatever questions you have to  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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