Go Back  Offshoreonly.com > Owners Forum > Sonic
Prop selection for 358 with 500efi's >

Prop selection for 358 with 500efi's

Notices

Prop selection for 358 with 500efi's

Old 05-18-2004, 07:26 PM
  #1  
Registered
Thread Starter
 
Join Date: Jan 2001
Location: Fredericksburg, VA
Posts: 283
Likes: 0
Received 0 Likes on 0 Posts
Question Prop selection for 358 with 500efi's

currently have a 2003 358 w/ 500efi's spinning 26 pitch lab finished bravo 1's
went out this weekend and GPS at 74.3 with 3/4 tank of gas and 2 people aboard , air temp 85, water temp 65 or so.
My question- what are the correct prop selection for this boat??
the 26's have a great hole shot, and turn to 5200rpm's, but I think their is some top speed missing.
How about 30's bravo 1's?
Thunder32 is offline  
Old 05-19-2004, 08:06 PM
  #2  
Platinum Member
Platinum Member
 
NJSONIC's Avatar
 
Join Date: Mar 2004
Location: Hillsborough,NJ
Posts: 467
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

Thunder32,
I currently have a 2001 Sonic 358 with 500 efi's with the bravo XR's. Sonic put 28" pitch props on it,they are not lab finished.The engine turn 4900rpm. I figure if they were lab finished you may see an extra 100 rpms. I have seen 78.9mph(gps)with half tank fuel,and 3 to 4 footers. Hope this helps.
NJSONIC is offline  
Old 05-19-2004, 08:29 PM
  #3  
Registered
Thread Starter
 
Join Date: Jan 2001
Location: Fredericksburg, VA
Posts: 283
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

Hey NJ thanks-
I have labbed 26's that came with the boat as I stated earlier, but I am the second owner.
I may look at another pair of props 28's or 30's and keep the 26's for spares.

Again, thanks for your input, that's what I was looking for.
I just knew that the 26's were the wrong props for this set up.
Thunder32 is offline  
Old 05-20-2004, 03:22 PM
  #4  
Charter Member #1055/Moderator
Charter Member
iTrader: (1)
 
GO4BROKE's Avatar
 
Join Date: Feb 2001
Location: CNY
Posts: 4,585
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

Labbed 28" Bravo 1's would get my vote
__________________
[img][/img]
GO4BROKE is offline  
Old 05-21-2004, 12:43 PM
  #5  
Registered
 
ROADHOG's Avatar
 
Join Date: Mar 2001
Location: Walled Lake Michigan
Posts: 628
Received 1 Like on 1 Post
Default Re: Prop selection for 358 with 500efi's

I have 28" Bravo 1's on my 2001 358 with 500EFI'S. No GPS but I do hit 5200 RPM's. I do not know if they are Lab finished because I bought the boat used. Have had faster boats than my Sonic and I feel that this is a good combination. Next time I take the props off I will look underneath and see if they are LABBED.
ROADHOG is offline  
Old 05-21-2004, 09:58 PM
  #6  
Platinum Member
Platinum Member
 
NJSONIC's Avatar
 
Join Date: Mar 2004
Location: Hillsborough,NJ
Posts: 467
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

Drag "N" Ass,
It sounds like you have lab finished props,they probably have the blades trimmed alittle. The highest rpm I have seen is 5000. That was with the drive trimmed way out and light load on board.
NJSONIC is offline  
Old 05-22-2004, 07:22 PM
  #7  
Registered
Thread Starter
 
Join Date: Jan 2001
Location: Fredericksburg, VA
Posts: 283
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

ok guys, may have to call "throttle up" on this one also.
I may start with 28's labbed, but I do have another question.
My last go- fast, a 32' AT rode alot better than the 358.
Maybe I'm not trimming correctly or something-
set the drives at neutral position, say "5" or so with no tabs, and a "1" foot wake will start the bow bouncing, which I am not use to, or to crazy about.
I bury the drives to calm down, and re-trim.
I have "tested" various combinations of drive and trim tab settings, but I have not found anything I'm happy with.
Thus, hoping to change props with right pitch AND add "cup" or whatever to add some stern lift to help the "bouncing bow" syndrome.
I defense to the 358 however, it does seem to ride better in 2-4 footers, than 1's or less.
Thunder32 is offline  
Old 05-23-2004, 06:24 AM
  #8  
Charter Member #1055/Moderator
Charter Member
iTrader: (1)
 
GO4BROKE's Avatar
 
Join Date: Feb 2001
Location: CNY
Posts: 4,585
Received 0 Likes on 0 Posts
Default Re: Prop selection for 358 with 500efi's

Are you sure 5 is neutral ? On my boat that is trimmed way out. Neutral is around 2 for me.
__________________
[img][/img]
GO4BROKE is offline  
Old 05-23-2004, 07:33 AM
  #9  
Registered
 
Pure Energy's Avatar
 
Join Date: Oct 2000
Location: N. NJ, Eastern LI
Posts: 3,043
Received 1 Like on 1 Post
Default Re: Prop selection for 358 with 500efi's

Sonics ride better at higher speeds, and rough water. I will get a slight porpus in calm water and slower speeds in my 31. I can gain almost 10 mph in rough water!!! Are you in fresh or salt water? I know other 35s that run 80ish with the 500s. I don't know what the "sweet spot" rpm is for the 500s, but I think for cruising it is around 3700 rpm. You'll figure it out!!!
Pure Energy is offline  
Old 05-24-2004, 07:00 AM
  #10  
Registered
 
splashandburn's Avatar
 
Join Date: Oct 2003
Location: Ballston Spa, New York
Posts: 521
Likes: 0
Received 9 Likes on 7 Posts
Default Re: Prop selection for 358 with 500efi's

I have a 2002 358 with the HP500 EfI's that I bouight over the winter. The boat had stock 28 Bravos that gave me about 4800 rpm and close to 78 mph (gps). I had the boat into Sonic and they swapped out the props for me with labbed 28's. Now I can hit 5200 rpm but only run around 74 mph. I'm thinking of going back to the stock 28's because of the speed issue but isn't it better to run in the upper range of the max rpm??
splashandburn is offline  

Quick Reply: Prop selection for 358 with 500efi's


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.