User Tag List
Results 1 to 12 of 12
Thread: Fuel pump pressure
-
02-21-2019, 10:42 PM #17000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
Fuel pump pressure
Looking at 2 holly fuel pumps. One is 1.5 - 4 psi and the other is 3 - 7 psi, I think. Carburated 3.0 looper. Which would be best? Both self regulating, up to 300 hp motors. Would the 1.5 - 4 psi be enough without a regulator? Would the 7 psi need to be regulated? The 7 psi one flows a little more per hour.
-
02-22-2019, 07:01 AM #2
Not an OMC guy, but compare flow rates at the same pressure, and voltage.
The 3-7 psi may flow the same amount @ the same pressure as the 1.5 to 4 psi pump. Unless they are rated at top psi pressure.
All this should be in the specifications.
I like the 3-7 pump. Then regulate it if you have to. jmoLast edited by W2F a V-King; 02-22-2019 at 07:06 AM.
James H. W2F a V-King... Want 2 Fly a V-King
Dedicated Site for Hydrostreams >> http://hydrostreamforums.com/
My Project 1979 V-King restore >> http://hydrostreamforums.com/viewtopic.php?f=9&t=2761
-
02-22-2019, 03:41 PM #3Banned
- Join Date
- Jan 2015
- Location
- Wisconsin
- Posts
- 2,331
- Thanks (Given)
- 458
- Thanks (Received)
- 343
- Likes (Given)
- 6429
- Likes (Received)
- 5147
- Mentioned
- 4 Post(s)
- Tagged
- 0 Thread(s)
In the factory manual they call for not less than 3psi @ 800 rpm in gear.
And like W2F above mentioned, you want to check flow rate of pump, Gallons Per Hour.Last edited by SS Minnow; 02-22-2019 at 05:10 PM.
-
02-22-2019, 05:46 PM #4Supporting Vendor
- Join Date
- Apr 2001
- Location
- Brookeland , Texas 75931 North of Jasper
- Posts
- 11,838
- Thanks (Given)
- 4
- Thanks (Received)
- 163
- Likes (Given)
- 11
- Likes (Received)
- 795
- Mentioned
- 1 Post(s)
- Tagged
- 0 Thread(s)
I use the Holley red pump with Holley blue pump regulator set at 3-4 lbs on carbs, works for me ...
JayJay @ JSRE
-
02-22-2019, 07:51 PM #57000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
Ok. I guess the question should be, will the 1.5 - 4 psi one work without a regulator? I know 7 psi is pushing it without regulating.
-
02-22-2019, 07:51 PM #67000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
One was 25 gph other was 35 gph if that helps.
-
02-28-2019, 07:45 AM #7
-
02-28-2019, 04:31 PM #8
I would absolutely use a regulator. Will be a far more consistent pressure at the injectors or carbs. My 2 cents.
Larry Gempp Jr.
Proud HydroStream Powertour Member
Current Ride - 2024 22 Liberator - 450R
-
02-28-2019, 07:06 PM #97000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
Im gonna, I have a regulator already...
-
Speed Jr. liked this post
-
03-01-2019, 07:55 PM #10
Larger of the two listed pumps with a regulator set to specification... Done
James H. W2F a V-King... Want 2 Fly a V-King
Dedicated Site for Hydrostreams >> http://hydrostreamforums.com/
My Project 1979 V-King restore >> http://hydrostreamforums.com/viewtopic.php?f=9&t=2761
-
11-17-2019, 08:47 PM #115000 RPM
- Join Date
- Oct 2008
- Location
- Plainville, CT
- Posts
- 804
- Thanks (Given)
- 417
- Thanks (Received)
- 23
- Likes (Given)
- 377
- Likes (Received)
- 67
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Besides eliminating the need for a bulb, does replacing the properly operating pulse fuel pump with and electric one provide any benifit in the way a carbed motor starts, idles, or runs?
-
11-18-2019, 10:22 AM #127000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
I only replaced it on this motor because I made a fuel rail that has a larger inside diameter than the stock plastic fuel rail. Mine had the dual pump setup with the small fuel pumps. I went with a aircraft grade pump that is very nice and way quieter than the old holly style I had on my other boat. It is a Facet Gold-flo pump. I just feel better having a electric pump rather than the little fuel pumps.
Last edited by Gorilla0178; 11-18-2019 at 10:32 AM.
-
Glastron1987 thanked for this postW2F a V-King liked this post
Similar Threads
-
Do I need to run a fuel pressure regulator with a Holley Red fuel pump?
By Steve2ManyBoats in forum Technical DiscussionReplies: 14Last Post: 03-31-2011, 08:09 AM -
OMC Tech: OMC LOOPER FUEL PRESSURE:output on fuel pump / vapor separator is not steady (< 3PSI)
By foca1 in forum Technical DiscussionReplies: 5Last Post: 06-01-2010, 06:48 PM -
fuel pressure stock pump VS elec. pump
By fastskeeter in forum Technical DiscussionReplies: 4Last Post: 08-14-2005, 09:03 PM -
Fuel pump pressure
By Darton in forum Technical DiscussionReplies: 6Last Post: 08-01-2003, 01:30 PM