Go Back  Offshoreonly.com > Technical > General Q & A
low compression 548 dyno testing has begun!! >

low compression 548 dyno testing has begun!!

Notices

low compression 548 dyno testing has begun!!

Thread Tools
 
Old 03-03-2017 | 04:41 AM
  #161  
SB
Registered
20 Year Member
 
Joined: Nov 2004
Posts: 14,104
Likes: 3,692
From: On A Dirt Floor
Default

Boosters and squirters (unless those flat head screws are hiding the squiters in the pic)

Last edited by SB; 03-03-2017 at 04:52 AM.
SB is online now  
Reply
Old 03-03-2017 | 05:07 AM
  #162  
articfriends's Avatar
Thread Starter
Platinum Member
20 Year Member
Platinum Member
 
Joined: Jun 2004
Posts: 7,317
Likes: 1,037
From: frankenmuth michigan
Default

Originally Posted by SB
Boosters and squirters (unless those flat head screws are hiding the squiters in the pic)
There are squirters, just hard to see, there isnt conventionsl boosters, heres the 3rd picture i took, if you zoom in you will see a stepped machined area with slots and tiny holes
Attached Thumbnails low compression 548 dyno testing has begun!!-20170302_113547.jpg  
articfriends is offline  
Reply
Old 03-03-2017 | 01:37 PM
  #163  
Registered
 
Joined: Nov 2005
Posts: 4,554
Likes: 3
From: Fredericksburg, Va
Default

Smitty, thats weird looking not sure how that would work with no venturies to help draw fuel in ?
ezstriper is offline  
Reply
Old 03-03-2017 | 10:29 PM
  #164  
articfriends's Avatar
Thread Starter
Platinum Member
20 Year Member
Platinum Member
 
Joined: Jun 2004
Posts: 7,317
Likes: 1,037
From: frankenmuth michigan
Default

Originally Posted by ezstriper
Smitty, thats weird looking not sure how that would work with no venturies to help draw fuel in ?
His idea is air will pull fuel thru the slots/feeds he built into the venturis. Before ever building the first complete main body he experimented with the design and adjusted things to get proper signal/fuel curve or draw. The design works when we tested it on dyno, it doesnt, however, out perform or keep up 100% with his modded 4150 that does so well, still in the experiment stage.
articfriends is offline  
Reply
Old 03-05-2017 | 10:12 PM
  #165  
Panther's Avatar
Frank's Marine Service
20 Year Member
Gold Member
 
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Default

Pretty cool stuff!!!

Just a hunch but I wouldn't be surprised if the carb makes a little bit more torque and HP.

Biggest complaint I have with EFI engines is the lack or torque feeling at higher rpm where their carved brethren seem to be better IMHO.

I like EFI for the safety factor the most and I'm learning more and more about tuning every day!
Panther is offline  
Reply
Old 03-05-2017 | 11:55 PM
  #166  
articfriends's Avatar
Thread Starter
Platinum Member
20 Year Member
Platinum Member
 
Joined: Jun 2004
Posts: 7,317
Likes: 1,037
From: frankenmuth michigan
Default

I been bolting and fitting efi stuff on dyno a hour or two a day, using mefi, was going to use a mefi 4 harness and ecu as its already hacked up BUT i have a virgin mefi3 harness that seems to reach everything with very little mods, flowed and checked new injectors, they match well and are good to go, luckily a gm tps and iac bolt to the 2200 cfm throttle body, after looking at rons holley and seeing a extra wire on tps i started thinking i was fukked as far as tps but as long as it sweeps from .5 volts to 5 volts when i test it im goid to go. I expect to pick up some tq with ability to set timing tables vs the mechanical distributer we were running that had all timing in by 4000 but dont have high hopes of outperforming the good 4150 numbers as far as hp. Perf trends software shows a 20 hp increase over the 4150 and i wouldnt be surprised if it DOES make 20 more hp than the QF and both dominators as they didnt really break 660 hp with mufflers on but am not expecting to miraculously make 700 hp.
articfriends is offline  
Reply
Old 03-14-2017 | 03:34 PM
  #167  
Registered
10 Year Member
 
Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Default

*Ahem*
Baja Rooster is offline  
Reply
Old 03-14-2017 | 03:53 PM
  #168  
F-2 Speedy's Avatar
Platinum Member
Community Builder
10 Year Member
Platinum Member
 
Joined: May 2012
Posts: 11,430
Likes: 3,957
From: Midwest & T-Rock
Default

My carbs are headed back, Huge shout out to Smitty and Norm, when Norm said noway they will flow enough fuel to support my cause Smitty made em work, big thanks my friend.
F-2 Speedy is online now  
Reply
Old 03-14-2017 | 10:59 PM
  #169  
Registered
15 Year Member
 
Joined: Mar 2008
Posts: 3,613
Likes: 375
From: Traverse City MI
Default

It's very cool how much time and work Norm and Smitty put into your carbs! Very cool stuff
offshorexcursion is offline  
Reply
Old 03-15-2017 | 06:23 AM
  #170  
F-2 Speedy's Avatar
Platinum Member
Community Builder
10 Year Member
Platinum Member
 
Joined: May 2012
Posts: 11,430
Likes: 3,957
From: Midwest & T-Rock
Default

Originally Posted by offshorexcursion
It's very cool how much time and work Norm and Smitty put into your carbs! Very cool stuff
That's for sure, anyone else would of probably just sent em back, Smitty knew I had some coin invested in these carbs and was bound and determined to make them work and did.
F-2 Speedy is online now  
Reply


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

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.