Go Back  Offshoreonly.com > Technical > General Q & A
350 Mag's Pushing A Brick >

350 Mag's Pushing A Brick

Notices

350 Mag's Pushing A Brick

Old 10-10-2009, 02:13 PM
  #1  
Registered
Thread Starter
 
Join Date: Dec 2005
Location: Bremerton, WA
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Default 350 Mag's Pushing A Brick

I am looking to get a little more power out of my 1989 350 Mag's.
The boat is a 1989 Slickcraft 310sc with twin carb 350 Mag's and alpha drives.
I just bought the boat from the bank and it need new drives. At the time of purchase it had two right hand drives so when I bought new aftermarket Alpha drives I did 1 LH and 1 RH.
I had a set of old Mirage 15 1/4 x 19 props so that is what I have ran so far but the max RPM is only 4000 @ 40mph.
I want to order new props -- Thinking Enertia 14 1/2 x 17 .

My thought is if I can get 50-75 more HP and by droping down in pitch and going with the new Enertia props I might be in the ball park with wot rpm.
Here is a picture of the brick.


23elim is offline  
Old 10-10-2009, 09:21 PM
  #2  
Registered
iTrader: (8)
 
Join Date: Nov 2006
Location: Tygart Lake, WV
Posts: 1,286
Received 118 Likes on 80 Posts
Default

I would just leave sleeping dogs be. That's a heavy boat for those Alphas to push. Sounds like the original owner blew the drives. Adding power is probably not a good idea to something that is allready stressed beyond what it was designed for.

As for power, there's really nothing to be had from simple bolt ons mods.. Intake, carb, etc... are worth 10-15hp max. You will have to change cam, heads etc.... to gain noticeable power gains..... Give Bob Mardera @ Marine Kinetics a call. He's the man with the plan for engine mods....
Ryan00TJ is offline  

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


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.