Like Tree0Likes

Drilling an additional ram mounting hole in K-plane

Reply
Old 09-09-2002, 10:19 PM
  #1
blackhawk
Guest
 
Posts: n/a
Default Drilling an additional ram mounting hole in K-plane

I installed longer K-planes on my boat last year. Helped the boat handle a lot in the slop but did scrub about 2 mph off the big end in flatter water. I was thinking about installing shorter rams to bring them up a little farther. But looking at them it would be a lot easier to drill another hole about an inch or so behind the stock hole which would bring the tab up farther. But, I want to make sure that this will not weaken the plate. Anyone done this?

Last edited by blackhawk; 09-09-2002 at 10:42 PM.
 
Reply With Quote
Old 09-09-2002, 11:21 PM
  #2
Platinum Member
Platinum Member
 
Tinkerer's Avatar
 
Join Date: Jan 2002
Location: ALTO, MI
My Boats: 2001 Daytona 26, 1992 SCARAB 34, 1989 25 Checkmate Convincer, 1977 Glastron Carlson CVX 18
Posts: 4,144
Default

Why not just fill the original hole and reinforce around the new hole???
Tinkerer is offline  
Reply With Quote
Old 09-09-2002, 11:45 PM
  #3
blackhawk
Guest
 
Posts: n/a
Default

Tinker, I will fill the original hole if it works. The new hole would still be in the strong part of the casting. I just want to make sure that the two holes that close together wouldn't weaken it.
 
Reply With Quote
Old 09-10-2002, 02:59 PM
  #4
blackhawk
Guest
 
Posts: n/a
Default

Anyone, anyone? No one has tried this? I don't want to be the first!
 
Reply With Quote
Old 09-10-2002, 04:51 PM
  #5
Registered
 
Join Date: Aug 2001
Location: Mentor, Ohio
My Boats: 1991, Baja, 270
Posts: 1,333
Default

The pressure point of that hole is on its top and bottom, not so much front to back, so a hole behind it, you wouldn't think it would be to much weaker. Then again anytime you drill anther hole you are effecting the integrity of the assembly.

The rib that the ram connects to, is it the same size an inch behind the original bolt hole, or does it taper down? If it tapers down, meaning you won't have as much stock on top and under the hole you are drilling, then it will not be as strong.

Good Idea, worth investigating.
Danny Usnik is offline  
Reply With Quote
Old 09-11-2002, 10:48 AM
  #6
blackhawk
Guest
 
Posts: n/a
Default

Danny, the rib is the exact same size one inch behind the stock hole. That is what got me thinking.

My logic was most of the stress is on the bottom and the "back" of the hole(water is putting upward pressure). I think I would be fine if the new hole did what I wanted it to. However, my concern was that if it didn't and I had to go back to my original hole, would the "back" of that hole now be weaker?
 
Reply With Quote
Old 09-11-2002, 10:55 AM
  #7
Were doomed!
Charter Member
Trade Score: (1)
 
Wally's Avatar
 
Join Date: Oct 2000
Location: Chicago, IL
My Boats: Chris Craft Stinger 222
Posts: 5,527
Default

Why not just machine a block of aluminum or other metal to fit inbetween the opening where the ram used to be and put a nut/bolt through it to take up the space and take any stress off that there may be there? any thought on that idea?
__________________
-Wally

Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
Wally is offline  
Reply With Quote
Old 09-11-2002, 10:59 AM
  #8
blackhawk
Guest
 
Posts: n/a
Default

Wally, that's a damn good idea for reducing the stress. I was hoping that someone else had already done this so I didn't have to be the one experimenting. But I may have to!!!
 
Reply With Quote
Old 09-11-2002, 11:52 AM
  #9
Registered
 
Join Date: Aug 2001
Location: Mentor, Ohio
My Boats: 1991, Baja, 270
Posts: 1,333
Default

Blackhawk,

Thinking about this last night. The rib being the same size behind the exsisting hole is good. Now that you brought up the point of moving the ram back if it does not work. That is a new hurdle, if you have to move it back it will be weaker behind the ram connection.
Most of your pressure is aft of the ram. So if it will not work and you move it back you will deffinatly have to do something with the hole you just drilled. I like wally's idea of putting a machined componant in the unused hole, that will deffinatly help with absorbing the shock.
I think this will work. I would suggest doing the math on the distance the tab with move with how far back to drill the hole. I think if you put the hole in the right spot this will work without question and you won't have to worry about putting it back.

Another suggestion, when you make the componant to go into the unused hole. Make the componant the same size. .500" hole make .500" pin. Now freeze the pin for a day to shrink it a small amount so you can get it in the hole. When it warms up it will be a perfect fit. This will be the strongest fit. Zero tolerance.
Just putting something close will not add strength.

Good luck, keep me posted,
Danny
Danny Usnik is offline  
Reply With Quote
Old 09-11-2002, 11:56 AM
  #10
Were doomed!
Charter Member
Trade Score: (1)
 
Wally's Avatar
 
Join Date: Oct 2000
Location: Chicago, IL
My Boats: Chris Craft Stinger 222
Posts: 5,527
Default

You do realise that with moving the ram out farther....thus raising the tab up higher you will loose a little in the doward position right? I dont know how far down you need the tabs to go but its just something to keep in mind.....
__________________
-Wally

Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
Wally is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
East Coast B
General Q & A
5
01-30-2007 07:14 PM
jhiguy377
General Q & A
1
12-06-2005 08:44 PM
CN24
General Q & A
7
04-25-2005 12:18 AM
NEVRENUFF
General Q & A
5
06-02-2002 02:10 PM
Shooter
General Q & A
6
02-03-2002 11:16 AM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 04:47 AM.


Copyright 2011 OffShoreOnly. All rights reserved.