i have a 1994 fountain fever 29 with twin mercury high performance hp 500 carburetor (the blue ones) i am looking into boosting them to obtain more power and i wanted to know if anyone had done it before, if it is hard and about how much it would cost to gain more horsepower. If i am wrong about how to boost these engines i am open to any suggestions from anyone.

Whipple makes a kit, and so does pro charger. Rough cost 5-7k per motor

ya i saw those and im considering them but is there anything a little less expensive?

put on some better heads , or get yours ported and maybe get a better cam and you will get 600 hp per side

Not much. You know what they say. Powerful, reliable, cheap. Pick two.

Also. remember to upgrade the fuel system and cooling system ect.
Not to put a stick in the wheel, but take a look at this thread about a 525EFI/whipple upgrade. There is no such thing as plug and play bolt on power, imo.
http://www.offshoreonly.com/forums/f...owerboats.html

If it was me, I'd get in touch with someone like Eddie Young, Bob Madara (RMBuilder) ect. Thay will happily tell you ecxactly what is involved in making a pair of blown 500HP's live, depending on your current setup.

Just my 2c's

Good luck with the project.

ive got 2 complete wipple side mounts with low hours for sale if interested pm me

same setup as yours with weiand 177's on top and some better exhaust they run like a raped date mid range is very impressive the boat will almost accelerate as fast as i can push the sticks foward

What's your time frame. I'll have two fresh 525sc's soon. Sell your hp500's and drop in my 525's

Plan on spending another 28-30k on SCX drives the torque of SC500's will destroy bravo drives.

I run a carbed HP500 with a procharger, key is redoing fuel and oil systems as well as a prosystems carb...works awsome...