Fountain 35 Lightning - how fast?

[Toffen]

Hi!
I have got a nice quote on a new Fountain 35 Lightning w/twin Merc 496 HO (425 HP). I have not decided if we will buy it.
I would be very happy if you could tell me how fast this boat should run with:
1. 2 x 425 HP
2. 2 x 580 HP (Procharger, etc)
3. 2 x 625 HP (Prosharger, etc)
Lower units will be upgraded ofcourse.
Cheeers, Toffen G

[Havasu Cig]

I drove a 2002 with hp 500's that ran 88 mph. That might give some bench mark to go from???

[BlownFountain]

Reggie is very good at predicting speed, and even giving it in writing. But you left out some details. My 1999 single step with stock 525's ran 87. That is with extension boxes, 30P props, and 1.5 gearing. we bumped it to 600 and got 92 MPH with 32P props. we then went to 675 HP and 34 P Props and got to 94 and hit the limiters, so we labbed the props to 35+ P and got to 97. Set up matters a lot - drive height, boxes, gearing, props, single or twin step, etc.
Hope that helps

[SoCalOffshore]

They have Fountain's in Norway? Must be a short boating season.