Go Back  Offshoreonly.com > General Discussion > Classic Offshore
What speed should I be seeing in a 1978 30' Scarab >

What speed should I be seeing in a 1978 30' Scarab

Notices

What speed should I be seeing in a 1978 30' Scarab

Thread Tools
 
Old 07-30-2018, 10:13 AM
  #1  
Platinum Member
Platinum Member
Thread Starter
 
phughes69's Avatar
 
Join Date: Dec 2001
Location: St. Clair Shores, MI
Posts: 2,044
Received 99 Likes on 53 Posts
Default What speed should I be seeing in a 1978 30' Scarab

I just picked up a 1978 Scarab 300, 330 HP BBC old rear exit log manifolds with thru hull exhaust, TRS drives spinning pout with 24" 4 blade props ( they look like Hydromotives but don't have a name on them), Merc Trans. From what I have read the RPM's should be 4500. What kind of speeds should I get out of this hull with the 330's?
phughes69 is offline  
Old 07-30-2018, 03:51 PM
  #2  
Platinum Member
Platinum Member
 
Too Stroked's Avatar
 
Join Date: Apr 2010
Location: Rochester, NY
Posts: 1,971
Received 183 Likes on 69 Posts
Default

Mid-50's on GPS. Want to go faster? Install a (non GPS) Checkmate speedometer.
Too Stroked is offline  
Old 07-30-2018, 03:52 PM
  #3  
Platinum Member
Platinum Member
Thread Starter
 
phughes69's Avatar
 
Join Date: Dec 2001
Location: St. Clair Shores, MI
Posts: 2,044
Received 99 Likes on 53 Posts
Default

That is about what I get. Im seeing 55 on gps
phughes69 is offline  
Old 08-29-2018, 11:22 PM
  #4  
Registered
 
bobo1's Avatar
 
Join Date: Dec 2006
Posts: 414
Received 2 Likes on 1 Post
Default

Would love to see pics.
bobo1 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.