Can anyone tell me real world speeds of a 2005 38 with a/c and gen?

with what engines???

Mine with A/C, no gen, no boxes ran 82 any day and 86 on a good day........with 630hp 540's

with 500 EFI with ext box they spin bravo 28, so I 'd say 75 to 78 mph... my guess.

525's

guy here had an 04 382 with 525's , a/c, gen, and mercator as well and ran upper 70's on a good day. He did run a set of labbed props too. a guy form the north east bought the boat last year.

LAriverrat. I am the northeast guy who bought Martin's 382. Were you ever on it? The reason I ask is the best I've seen is 74 on the gps. And that was only once. Have not put the 5 blades on yet,but would think I would lose top end. Just curious as to how fast it has run. Of coarse Martin told me he never came off idle when we were negotiating.
BTW 74 full tank, 2 guys,no gear.71 loaded with fuel,water,coolers,gear,and 6 adults.

I have 500EFI's and I have never seen over 74 MPH. I am running 28" 4 blade Bravos and it turns to 5300 RPM.
I want to try 30" to get better mid range running speeds, I rarely push her to full throttle.

why would a twin 500 efi spinning 28, run 74, and a 47 fountain (triple 525) spinning only 30 (only 2 pitch above) would run 90 gps?

gear ratio are different?

What is the gear ratio on those 500 efi formula?

J.B. sent you a P.M.

I bet the gear ratio is the same. well........the Formula and Fountain have the same running length, and they probably weigh about the same!

plus I'm willing to bet the Fountain is getting a few more rpm's out of it's motors. (does it really run 90?)