2005- 260, 502 Tyler Crockett 565 hp, 83-84 gps @ 5500rpm full tank and 2 persons, 28 Bravo 1 labbed by BBlades.

Had a 509 SC's 250 with 650 H.P. I best saw 81.7 out of it with a hydro 28. Seem'd like the prop liked to blow out when the boat layed on plain still havent got a full answere why yet. But had a 589 built with a 10-71 intercooled with about a 1k horse numbers hope to be posted soon.
-Mike

280-515ci. 575+hp,82gps@5200rpm,2 Persons,3/4tank. 28 Bravo 1

2000 280 - 502 mag with sidemount Whipple, Gil exhaust ,30in labbed Bravo 1. 85MPH with light chop and 1/4 tank.

Bring it back from the dead!!
2003 280
Mercury 575sci with 3.5 pulley, 85 gps 2 people full tank with more left. 28 pitch p5x box stock.

88' 30. 2/502s, Brodix BB-1s, Erson cams, 230/238-.600 lift. 28 Bravo 1s, RPM airgaps, 830 Holleys. 88.3 best gps, 86-87 any day. 85.4 overloaded.

5100-5400 rpm depending.

What do you think speed I should get from my 81 Velocity 30 with 19.5 inch X dimension. twin 502 efi with a little over 500hp a piece , Bravo XR drives 1.5 ratio
and what prop should I be looking at ?