Go Back  Offshoreonly.com > Technical > General Q & A
How fast can I go >

How fast can I go

Notices

How fast can I go

Thread Tools
 
Old 06-04-2021, 04:49 PM
  #61  
Registered
 
Join Date: Jan 2006
Location: taxachusetts
Posts: 3,094
Received 700 Likes on 354 Posts
Default

Originally Posted by goodboy
So someone suggested this site: https://www.go-fast.com/Knowledge-ba...eed-calculator

I put down 3900# (I don't know how heavy my boat is) 180hp (old v6) and lowered the constant to 220.
. And I got 47mph... That's what my boat does now.

If I up to it 330hp I get 64mph...

Dam if that's true I'm a super happy man!
gonna need a 3/4 race cam for this to happen.
sutphen 30 is offline  
The following users liked this post:
phragle (06-04-2021)
Old 06-04-2021, 05:03 PM
  #62  
Registered
Thread Starter
 
Join Date: Sep 2016
Posts: 35
Received 1 Like on 1 Post
Default

Originally Posted by sutphen 30
gonna need a 3/4 race cam for this to happen.

Well...

Is the XM264HR a race cam? Idk lol

Lift .488"/.495" Duration 264°/270° RPM Range 1200-5200


Just finalizing the details with my engine builder...

He's thinking and I'm hoping... That'll I'll b between 330 and 350 with the engine build... It'll be dyno tuned 5.7 roller block with a XM264HR cam, vortec heads and performer rpm intake and 1409 600cfm carb, dui ignition... Threaded rocker studs and ARP rod bolts.

I do almost 50 with the hi-five prop now and I guess 190php with the 4.3 4bbl... add another 150hp and I would think that I should break 60 fursure... But ya all is unknown till its done lol

Last edited by goodboy; 06-04-2021 at 05:24 PM.
goodboy is offline  
Old 06-05-2021, 04:43 PM
  #63  
Registered
Thread Starter
 
Join Date: Sep 2016
Posts: 35
Received 1 Like on 1 Post
Default

Anyone have any tips on how I'm going to pick a prop?

Seeing as I'm going from what I think is a 1.84 to a 1.5 I was thinking of trying the prop I have now...

Honestly have no idea how to go about it.
goodboy 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.