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Top speed of 38

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Old 09-10-2007, 01:38 PM
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Got the right gear ratio now. Hit 89 @ 5400 RPM spinning 6 blade 31p Herings. Gonna try to get a set of 33p and see what happens. The boat feels so much better.

Has anyone tried extension boxes on a 04 or 05 38?? If so please post results.
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Old 04-12-2008, 10:35 AM
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John what drive do you have on your 38'? I have xr's with sport master lowers. My best speed is 87 on the tattletale. Low fuel and two people in the boat. Mid spring temps. Did you boat start with herrings or was it something else? If so what did you start with and what was the pick up going with herrings? I found your post by searching extension boxes. I to would like to know if extension boxes help a 38'. I have staggered 525's. Thanks
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Old 04-16-2008, 01:43 AM
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Originally Posted by KS_Jayhawk
John what drive do you have on your 38'? I have xr's with sport master lowers. My best speed is 87 on the tattletale. Low fuel and two people in the boat. Mid spring temps. Did you boat start with herrings or was it something else? If so what did you start with and what was the pick up going with herrings? I found your post by searching extension boxes. I to would like to know if extension boxes help a 38'. I have staggered 525's. Thanks
My boat came with regular length XR's and Labed 32 Bravo 1's. Hated how the boat ran. Cruise sucked and only hit 87mph that took forever with the engines at 5600 rpm. The buzzers were going crazy. After the shorties and Hering's felt like a new boat. Cruise, acceleration and top speed are soooo much better. Coming up on plain was a bit tuff though. 1 prop had the defusior ring and other didn't. Just sent them to Hering and got em all cleaned up and defusior ring back on. Can't wait to try them out now. Just gotta wait till the weather gets a bit better up here in Vancouver. But like I said it was hitting 5400rpm. Would like to get it down to 5200rpm. Might try to get a set of 32's.
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Old 09-11-2016, 10:41 AM
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[QUOTE=TJ Bart;2259277]05, staggered with 525's, full load of fuel, 93mph today[/QUOTE
What year ?
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Old 09-12-2016, 03:45 PM
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Originally Posted by Viaqua
87.4 (4 x's on my GPS in dead air and light chop) on stock 500 EFI's, non labbed 26" Hydros, B-1 drives-all stock in a 2001 hull. The engines are basically new though.

74 degrees outside and salt water with 60 gals fuel on board and no one else. They will go faster/slower depending on water and outside temp but I have owned this one for 4 years and it runs faster than ever with the fresh motors. Trim to "5". I can bank on 84-86 on most days. Most "claim" 82-86 according to posts.
pretty acurate . Mine ran 87 with hp 500's and no cabin seats or sink.
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