Cobra will be a rocket!! I am running stock bravos 1.65 ratio with 30p labbed bravo props. Turn motors 5500 to 5800rpm. Best speed cool day light on fuel nice chop 83mph. Runs 80 most days.

Haaaa-that will keep those damn 70 MPH waverunners off your back!!! This is my first go fast in a long time so Im trying to get back into it-I've been fishing for the last 20 years...a lot has changed since my Twin SBF 250 NOVA! I can't seem to get my boat past 60 MPH on the gps-this was with 4 in the boat 3/4 tank and beach stuff. I need to get props looked at and learn how to trim it out.

Take a straight edge run along bottom of boat and set drives and tabs even with bottom and mark your indicators at that spot. That is neutral trim. My 06 292 liked little positive trim (drives out) at all times unless running slow in ruff water. 292s handle poor with negative trim IMOP. Over trimming never helped me much just more prop slip. You should turn 350 mags 5k +RPM on big end. If not you are over propped. I would think 26p bravo 1s if you have 1.65 ratio drives? Maybe 28 labs that is what 6.2s pull?

http://www.summitracing.com/parts/drt-03124272 Here ya go, start with two of these. There has been many threads on 292s 5.7s VS 6.2s and the general opinion is that there is not a lot of difference in top end, the 6.2s just get there quicker. With the 350 HP 383's from Mercury you would probably see 73-74. You could also get a decent price for your engines so it would not be that expensive. Just not sure its worth it for only a few MPH. I have been thinking about the 427's set up right boat should see mid 80's. I have concerns about how that hull is going to handle at 85, and so does Formula I asked them. You will need hydraulic sterring, actually you need it now its night and day best thing I ever did.

With twin 6.2s the 29' Fountain will pull a bit over 70 with 100 gallons of fuel and one person onboard. (Not sure if the Fastech is about the same speed hull or not.) You might get +1-2 with labbed props. Mine are stock 26 pitch Bravos. No easy hop-ups for the stock 6.2s. It has been suggested above to build up some Dart 427 smallblocks. I would think it would be easy to get 425 h.p. with a mildly built 427. The Bravo drive should handle this. That ought to put you into the low 80s.

Thx ev one-great info and much appreciated, I am looking into the hyd steering, I hate the power assist that I have (or whatever it is actually called) so I'm def going to switch that. I am going to take the props to Atlantis and have them gone over-does 8300# sound like a fair operating weight? based on 50% fuel/300#'s of crap and 4 people? Dry weight 7000#'s-what is LWL on these 292's 27' I cant find it. I think I'll pull the motors and doctor everything up till it shines like new then have my engine guy do a little magic this winter:)))

Thx again!

Isn't Eddie Young from Young Performance Marine out your way. Bob Madera is in New York, a little drive, but both are very good.