Speed and set up?
08-14-2012 | 03:35 PM
#31
Registered User
Joined: Mar 2012
Posts: 420
Likes: 0
From: Baltimore md
hahahaha
2003 31ss 575sci's, superchillers, modified ECM's, ported heads, full roller cams, and other "assorted" goodies 
Running XZ's at the time, now running XR's... a tad bit slower as they take at little more HP to turn... still mid 90's.
Boat is also fully loaded ammenity wise too.. a/c, fridge, microwave, tv, dvd, ect...
The GPS does not lie...
Water was 2' chop, fuel was almost gone, 1 passenger, wind behind us, 6000rpm (rev limiter set to 6800), 32P bravo 1's labbed, starved myself for a week to loose 10 more lbs lol...
Running XZ's at the time, now running XR's... a tad bit slower as they take at little more HP to turn... still mid 90's.
Boat is also fully loaded ammenity wise too.. a/c, fridge, microwave, tv, dvd, ect...
The GPS does not lie...
Water was 2' chop, fuel was almost gone, 1 passenger, wind behind us, 6000rpm (rev limiter set to 6800), 32P bravo 1's labbed, starved myself for a week to loose 10 more lbs lol...
08-14-2012 | 05:46 PM
#32
Charter Member #1055/Moderator
Joined: Feb 2001
Posts: 4,585
Likes: 0
From: CNY
Assuming 1.5 ratio and 5000 rpm's (should be 5400), that is 17% slip. My boats are usually 12%. Spinning a 30 to 5400 @ 12% slip would put you at 90. I would expect you to swing a 34 or so with 850hp. I think you need to look at your set up. I had a friend running 10 mph faster than you with tweaked 525SC's. I don't remember what prop.
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