Go Back  Offshoreonly.com > Owners Forum > Fountain
New 500 EFIs being built by Potter Performance >

New 500 EFIs being built by Potter Performance

Notices

New 500 EFIs being built by Potter Performance

Thread Tools
 
Old 06-25-2014 | 07:29 PM
  #221  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 635
Likes: 0
From: Sarasota FL
Default

Some let me know about the dyno thing please. Can this be done??
Lucky1456 is offline  
Reply
Old 06-26-2014 | 08:06 AM
  #222  
Registered
 
Joined: Mar 2011
Posts: 943
Likes: 277
From: So. Burl. VT.
Default

I think you will be happy when you get your boat back. you have upped each motor by 120 hp. I do agree your current intake and injectors are at their max, but to go to the next step is big bucks! Ron has built you some great motors out of what you had don't get caught up in the hp wars. Go enjoy your boat it sounds like a great one.
KWright is offline  
Reply
Old 06-26-2014 | 02:35 PM
  #223  
ZXXX Donzi's Avatar
Registered
 
Joined: Jun 2004
Posts: 834
Likes: 2
From: Tennessee
Default

Yep, sounds like they made really good torque. You will feel that. It's summertime......enjoy. Those last few mph in a Fountain come slowly anyway. It starts to get lonely much above the mid 80's. Don't get me wrong, I am glad I have been there and want to do it again but for now I am good with regular oil change intervals, running 80 and burning 87.

I have friends that tune and props test all summer. They can squeeze out a few more mph than me but we mostly ride together?
ZXXX Donzi is offline  
Reply
Old 06-27-2014 | 04:11 AM
  #224  
Registered
 
Joined: Aug 2005
Posts: 6,306
Likes: 1
From: Between A Womans Leggs in IL
Default

Originally Posted by ZXXX Donzi
Yep, sounds like they made really good torque. You will feel that. It's summertime......enjoy. Those last few mph in a Fountain come slowly anyway. It starts to get lonely much above the mid 80's. Don't get me wrong, I am glad I have been there and want to do it again but for now I am good with regular oil change intervals, running 80 and burning 87.

I have friends that tune and props test all summer. They can squeeze out a few more mph than me but we mostly ride together?
hey we know a guy that had a potter 625 that made his 22 run 85mph..was not fast enough so he took his engine out and paid him for one of those 700's and paid a member on here to put it back in,,here is the kicker..8k plus later the boat still goes 85 mph..i remember one of our friends has the exact same boat with a 525 efi that goes 84,,,so what gives lol..

Last edited by FIXX; 06-27-2014 at 09:18 AM.
FIXX is offline  
Reply
Old 06-27-2014 | 04:46 AM
  #225  
Registered
 
Joined: Nov 2006
Posts: 1,261
Likes: 2
From: Great Sacandaga Lake, NY
Default

Originally Posted by Rattlesnake Jake
FWIW. A few years back I built a 500 EFI 509" with a Crane 741, lifters, springs & rockers. 9:6-1 JEs, 315 CNC AFRs. Dynoed & tweaked by one of the best EFI guys around. Made 572HP @ 5400, 616tq @ 4500 on 89 octane. Correction factors, altitude, avg. humidity, air temp etc. for my area.
:
When I had this engine dynoed I was expecting 600 HP. Expressing my disappointment of not reaching that mark the dyno operator said I can show 600+ HP if you want, but in reality your boat will not be any faster.
Rattlesnake Jake is offline  
Reply
Old 06-30-2014 | 06:32 PM
  #226  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 635
Likes: 0
From: Sarasota FL
Default

Jake what kind of boat were these motors in? How fast did it top out at. I'm hoping to get in the 90s with the right props with my new set up. Do you think I will make it?? With the weight reduction and all the other goodies. I hope I do. I'm going to be really disappointed if not.
Lucky1456 is offline  
Reply
Old 06-30-2014 | 06:42 PM
  #227  
Registered
 
Joined: Nov 2006
Posts: 1,261
Likes: 2
From: Great Sacandaga Lake, NY
Default

That engine was in a 27 Fastech boat ran mid 70s with a 26 Bravo 1.
I'm not familiar with Fountains and what HP it would take for your 32 to hit 90 so I can't say. But I hope you find the right combo (boat, power, props) to achive your goal.
Rattlesnake Jake is offline  
Reply
Old 06-30-2014 | 06:45 PM
  #228  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 635
Likes: 0
From: Sarasota FL
Default

I stopped by Potters on Friday for a few minutes and it looked like they were hooking up the fuel systems to me. I took one picture of the motors just to keep it interesting.
Lucky1456 is offline  
Reply
Old 06-30-2014 | 06:50 PM
  #229  
SB
Registered
20 Year Member
 
Joined: Nov 2004
Posts: 14,090
Likes: 3,681
From: On A Dirt Floor
Default

This thread get's confusing as some people are comparing 500EFI builds vs the OP's 415MPI build.

The MPI intake is hugely restrictive. The 500 EFI is much better, and just to mention it, but restrictive enough that it is hard to get 600HP or more on the 500EFI intake without major mods and thus why Tyler Crockett made a top mounted throttle body mod to the 500EFI intake to get well into the 6's.

When an intake runs out of breath, it runs out of breath. Thus why HP will be limited. Simple laws of nature.

A 10$million dollar longblock under a NA 415/MPI intake isn't gonna be a world beater.
SB is offline  
Reply
Old 06-30-2014 | 07:02 PM
  #230  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 635
Likes: 0
From: Sarasota FL
Default

[ATTACH=CONFIG]525486[/ATTACH][ATTACH=CONFIG]525487[/ATTACH]
Lucky1456 is offline  
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.