trim tabs
04-23-2008, 10:59 PM
#11
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I do have hyd steering but im still getting mixed signals from everyone. I would love some more input on wether i need tabs or not. I love the boat and i want to get every thing i can get out of it. I have ran it it at 4200 rpm at about 62 mph but i want more. OSO please help me out. Big shout out uo j-bonz for helping me out with everything.
Thanks for all thats helped out my good friend, Itspeanut.
Jr.
04-24-2008, 07:34 AM
#12
Registered User
280's used to have a warning cast right into the top of them...
"Do not use on boats under 24' "
You can't diagnose chine walk unless you understand why it's happening. There are many reasons, including exceeding the design limitations of the hull (speed), changes in balance (weight distribution) excessive trim, improper props, etc. Chine walk occurs when the hull loses it's ability to stay up (lift) and it falls, causing the boat to oscillate on its outside contact surfaces (hard chine). Tabs are just going to push the bow down, slowing the boat and probably presenting a dangerous ride attitude at max speed.
If I had to guess, you either have too much motor setback, too much prop height (x-dimension) or a prop with too much stern lift.
There was some posting a while back on brackets and setback on this hull. Supposedly the long brackets can cause problems. My recollection isn't that good. You'll have to plow thru some searches. Try posting in the Apache section- or maybe PM'ing Eric Froberg.
You could also have air in your steering. The only way to tell is to bleed it very thoroughly. it may feel firm when you tug on it but at hard load, it could be squishy.
"Do not use on boats under 24' "
You can't diagnose chine walk unless you understand why it's happening. There are many reasons, including exceeding the design limitations of the hull (speed), changes in balance (weight distribution) excessive trim, improper props, etc. Chine walk occurs when the hull loses it's ability to stay up (lift) and it falls, causing the boat to oscillate on its outside contact surfaces (hard chine). Tabs are just going to push the bow down, slowing the boat and probably presenting a dangerous ride attitude at max speed.
If I had to guess, you either have too much motor setback, too much prop height (x-dimension) or a prop with too much stern lift.
There was some posting a while back on brackets and setback on this hull. Supposedly the long brackets can cause problems. My recollection isn't that good. You'll have to plow thru some searches. Try posting in the Apache section- or maybe PM'ing Eric Froberg.
You could also have air in your steering. The only way to tell is to bleed it very thoroughly. it may feel firm when you tug on it but at hard load, it could be squishy.
Last edited by Chris Sunkin; 04-24-2008 at 07:44 AM.
04-24-2008, 10:45 PM
#13
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Join Date: Feb 2005
Location: long island, newyork
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the steering was hydraulic as well on my unit. ended up swaping the big 3.o for a 2.5 . which is why i suggested it.came out to a 4 1/5 inch setback, plus the 4 built into the 2.5 shorty midsection. the weight is an issue. high c.g of that big 3.0 power head only intenseifies the issue once it starts. plus the set back. i would hope not something like a gill bracket but more like the stainlessmarine box6,8,or 12 inch kind.
more than likely the bottom has issues, starting the whole cycle of events for that hull.
had similiar issues with a 30 superboat, 300 x's 4 inch cmc jackplates. ran 92 mph. getting thru the 75/76-8 barrier was hell. th ebottom did have issues as it too ended up being trued. however the same boat same year same size and weight, just used the 2.5's . different beast..
ya dont see to many 22 allisons with 300's now do ya.
ever see or better yet run one. and watch or feel what happens right at that point,? yup.
f that.
more than likely the bottom has issues, starting the whole cycle of events for that hull.
had similiar issues with a 30 superboat, 300 x's 4 inch cmc jackplates. ran 92 mph. getting thru the 75/76-8 barrier was hell. th ebottom did have issues as it too ended up being trued. however the same boat same year same size and weight, just used the 2.5's . different beast..
ya dont see to many 22 allisons with 300's now do ya.
ever see or better yet run one. and watch or feel what happens right at that point,? yup.
f that.
