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  #1  
Old 10-15-2013, 09:11 PM
Allstricker Allstricker is offline
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Increase engine performance, horsepower

Hi All

Does anyone have any suggestions on how or if I can increase my engine performance or horsepower?

I have a 99 5.7lt vortec max with EFI.

Chris
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  #2  
Old 10-15-2013, 09:31 PM
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Quote:
Originally Posted by Allstricker View Post
Hi All

Does anyone have any suggestions on how or if I can increase my engine performance or horsepower?

I have a 99 5.7lt vortec max with EFI.

Chris
What is your ultimate goal? Stronger holeshot? More speed on top end? A new cnc propeller will give your more bang for the buck than any engine work. Considering you have efi any changes in engine will likely need a new flash of the ECM.
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  #3  
Old 10-15-2013, 10:52 PM
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what James says - what do you want to accomplish and how much $$ do you have... do you want something like this?

http://www.youtube.com/watch?v=h7O9a9KBKfk
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Old 10-15-2013, 10:54 PM
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Originally Posted by mikeg205 View Post
what James says - what do you want to accomplish and how much $$ do you have... do you want something like this?

http://www.youtube.com/watch?v=h7O9a9KBKfk
Just after watchin' this video a zillion times - I don't think there's a transmission - prop turns on start it seems..
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Old 10-15-2013, 11:02 PM
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thatsmrmastercraft thatsmrmastercraft is online now
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Great video. I agree, there doesn't appear to be a transmission.

Now, back to the real question. To what end do you require more power?
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  #6  
Old 10-16-2013, 12:09 AM
Allstricker Allstricker is offline
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Boat: Mastercraft, sportstar 190, 1999, 5.7lt vortec max
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I don't really require more HP, I've been running all summer with a different prop and have noticed a big difference in the hole shot. Just wondered if there are any changes I could make to the engine or EFI to enhance engine performance a bit.

Chris
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  #7  
Old 10-16-2013, 12:12 AM
88 PS190 88 PS190 is offline
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Quote:
Originally Posted by thatsmrmastercraft View Post
Great video. I agree, there doesn't appear to be a transmission.

Now, back to the real question. To what end do you require more power?
My wager is that it is a jet - which none of those have transmissions.

This wager is based on the spray, the noise, and how the engine is sitting sort of flat and up in the boat.


5.7 is a REAL common engine, lots of data on performance tuning is available through a wide number of reputable engine builders.

I think the single biggest thing would be a cam and head work followed up with a good tuner to tweak the ECM. If you were debating where to spend the money, prop is a solid start as you gain efficiency (same for having your old prop tuned up) which is free HP. Also a prop can tailor the power you do have to work for you better.


Biggest single thing is, every person I've talked to who wants more horsepower in a boat (other than folks pulling jumpers or slaloming on lakes with tight set ups) really just needs a different boat. Sad fact is that the inboards are just not designed to be all around fast boats.
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Old 10-16-2013, 07:13 AM
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all of this is true but.. Arizona Speed and Marine I'm sure will offer you a chance to spend some money with them :-)

http://www.azspeed-marine.com/
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  #9  
Old 10-16-2013, 10:55 AM
TRBenj TRBenj is offline
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Originally Posted by 88 PS190 View Post
Biggest single thing is, every person I've talked to who wants more horsepower in a boat (other than folks pulling jumpers or slaloming on lakes with tight set ups) really just needs a different boat. Sad fact is that the inboards are just not designed to be all around fast boats.
Youre talking to the wrong people.

Theres no reason you cant have your cake and eat it too... assuming you'd consider a 60mph ski boat "fast". It just takes a little bit of knowledge and a little bit of money (well, maybe more than a little). Im in the camp that thinks "if it wasnt built for skiing, then I dont really care how fast it goes". Fast ski boats are pretty cool.

Done properly, a "fast" ski boat is more than just a thrill- it enhances skiing performance as well. Lighter parts = smaller wake, more power = better holeshot, better speed holding, more throttle response, higher top end... so better for barefooting, pulling larger ski acts, etc.
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  #10  
Old 10-16-2013, 11:18 AM
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Table Rocker Table Rocker is offline
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Originally Posted by 88 PS190 View Post
My wager is that it is a jet - which none of those have transmissions.
I'm pretty sure you are correct. My question is what is the water hose over the gunnel? Maybe a water cooled intercooler or something. At least it is taped on nicely.
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