SST60 Power

I found your entry on a google search about the SST 60.  I have an SST70 (modified 60) and I am a die hard Hydrostream fan.  I am putting my SST70 on a performance inflatable I had specially made with less lift than the stock boat so it will stay on the water.  It's not complete yet and I'm wondering what kind of power the SST engine makes. 

I was curious what kind of speed the motor made on the Stream.  I haven't run my engine yet, so I am not familiar with how much punch it makes.  As you said a ported motor (like mine) won't have as much punch, but I will pretty light (boat 130, engine 160, driver 200) so around 500#  total.  I expect the light tunnel will be a handful, but hey, you aren't racing until you have more than you can use right? 

I have raced boats all my life, from 2 to 6 cylinder stuff.  I have a '74 model Hydrostream Vamp with a '80 model 200 Mariner for my ski boat.  Two questions for you: 

How much midrange do you give up with the ported engine on the SST 60? 

What kind of speed did the SST powered stream make? 

Thanks Rusty

You give up tons of low and mid range on a ported engine. Finding a prop will be the trick for your new boat. Target RPM at 7000 and up. Maybe try a 14 or 15 pitch to start.

Randy

 

 

Please submit whatever questions you have to IHRTechTalk@yahoo.com.  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.

Thanks,
Mark C.

 

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