Go Back  Offshoreonly.com > Technical > Prop Talk
Prop suggestions Ol 37 GTX >

Prop suggestions Ol 37 GTX

Notices

Prop suggestions Ol 37 GTX

Old 03-06-2021, 03:39 AM
  #1  
Registered
Thread Starter
 
Join Date: Mar 2021
Posts: 27
Received 4 Likes on 1 Post
Default Prop suggestions Ol 37 GTX

Need advice regarding props for newly rigged Ol 37 GTX

engines are making 1000hp @ 6000rpm and 1000lbft @ 4400rpm
Arneson drives 1.32 gears

The props suggested now are 18x32x18R.

if anyone have a couple of props in that dimension and interested in selling please contact me.

as I looked over what’s listed it seems to be most 17” diameter props for sale, do anyone no if my hull would work with the smaller diameter or have any input as I can be completely wrong an the 18x32x18 props.

I want to bye used props to establish baseline.

I live in Sweden so the market for props are really limited.

grateful for all help I can get
Peter
Peter Oberg84 is offline  
Old 03-06-2021, 01:05 PM
  #2  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
Posts: 18,409
Received 791 Likes on 387 Posts
Default

Your set up is very unique and I haven't seen any other OL's with Arnesons. I think testing props is going to be the only way to get it dialed in.
You could try calling Outerlimits for advice.
Griff is offline  
Old 03-06-2021, 02:45 PM
  #3  
Registered
Thread Starter
 
Join Date: Mar 2021
Posts: 27
Received 4 Likes on 1 Post
Default Guessing props

It’s true, probably a lot of testing is the only way to the best props but I was hoping there are some guys that know the hull and had some input of what the boat wants.

The boat is new to me, never drove it. I bought it last spring from some guy in Danmark and the boat supposed to be in good drivable condition. I couldn’t go look at it in person do to the corona situation so I bought it on pics and videos.

But when I got it both engines where frozen end the blocks had cracked the intercoolers where cracked and so on...

Here I am one year later and doing a makeover looking forward to this summer so I can go boating.

After what I heard the boat has gone 120+ with xr sport masters on its and 1.26 gears with Maximus 15-5/8x34 and that’s how it was when I bought it.

grateful if someone has input or ideas on what the hull wants and recommendations on where to start.

thanks Peter
Peter Oberg84 is offline  
Old 03-06-2021, 07:55 PM
  #4  
Registered
iTrader: (5)
 
Join Date: Jul 2009
Location: Taunton Ma
Posts: 8,123
Received 319 Likes on 175 Posts
Default

There were only a few 37 gtx’s built, but I’d imagine you could use a 37 stiletto with 6’s as a comparative starting point. I only know of one other ol with Arnesons and it’s an sl44 my buddy had built new. Completely different hull
Unlimited jd is offline  
Old 03-09-2021, 02:07 PM
  #5  
Registered
Thread Starter
 
Join Date: Mar 2021
Posts: 27
Received 4 Likes on 1 Post
Default

So, where are all the Ol experts when you need the...?
Peter Oberg84 is offline  
Old 03-09-2021, 06:02 PM
  #6  
Registered
iTrader: (5)
 
Join Date: Jul 2009
Location: Taunton Ma
Posts: 8,123
Received 319 Likes on 175 Posts
Default

No one has expertise in what your attempting to do. You’re the first to put those drives on that hull, so pave the way. Someone might have an educated guess if you post propshaft height and distance off the transom of the props.
Unlimited jd is offline  
The following users liked this post:
endeavor1 (03-09-2021)
Old 03-10-2021, 12:10 AM
  #7  
Registered
Thread Starter
 
Join Date: Mar 2021
Posts: 27
Received 4 Likes on 1 Post
Default

Just thought that someone maybe would have some input from the stiletto with #6 drives.

I read somewhere in a thread here on oso that a stiletto with big power and #6, at the time belonging to “thundersone” (maybe misspelled) had some info that when going up from 17” 5 blade 15r to 17,5” 4 blade the boat felt loose and started to porpoise over 110 but when I got back to 17” 5 blade 15r all went away.

thanks
Peter
Peter Oberg84 is offline  
Old 03-10-2021, 07:03 AM
  #8  
Registered
 
Join Date: Nov 2003
Posts: 408
Likes: 0
Received 104 Likes on 60 Posts
Default

we run arnson8s on a slingshot 388 things to note are no bow lift or trim you lower the drives as the hull rises up with speed to keep the props the correct depth also big surfacing props has massive bite offplane so use much caution when shifting into reverse its possible to break the reverse plates you need really good trannys and large u joints that are changed often big blower engines are awesome but around the docks there is a bit of a learning curve to shift on the low point of the blower roll yet not stall it.... we shift and give it a jab of throttle to squirt a bit of fuel in works well
boostbros is offline  
Old 03-10-2021, 09:11 AM
  #9  
Registered
 
Join Date: Apr 2007
Location: Ontario
Posts: 497
Received 17 Likes on 11 Posts
Default

I have a beautiful set of Mercury Racing 17.5x32 5 Blades if you are interested.
bigfarmer is offline  
Old 03-10-2021, 09:28 AM
  #10  
Registered
Thread Starter
 
Join Date: Mar 2021
Posts: 27
Received 4 Likes on 1 Post
Default

What rake?
Peter Oberg84 is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.