User Tag List

Results 1 to 8 of 8
  1. #1
    Join Date
    Mar 2018
    Location
    NJ
    Posts
    196
    Thanks (Given)
    0
    Thanks (Received)
    2
    Likes (Given)
    0
    Likes (Received)
    10
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Fuel Pressure Regulator

    I have a fairly modified 225 promax powerhead (260 porting/145 compression) just setting it up. I am starting with a R32 ECU and a 39psi regulator but was thinking of bumping up to a 56psi regulator,has anyone tried this combination with success. Thank you

  2. #2
    Join Date
    Jan 2004
    Location
    Los Angeles Cal.
    Posts
    4,741
    Thanks (Given)
    2
    Thanks (Received)
    377
    Likes (Given)
    2934
    Likes (Received)
    5184
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Try a adjustable regulator that way you can dial it in however you like.
    Attached Thumbnails Attached Thumbnails 888501B0-CF08-4627-A52A-2C54131200B9.png  

  3. #3
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    8,260
    Thanks (Given)
    179
    Thanks (Received)
    321
    Likes (Given)
    3578
    Likes (Received)
    1236
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That ECU is mapped for 39psi regulator so going to 56psi will just make it run rich. If you want to go 56psi you should get an ECU with a 56psi curve.

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  4. #4
    Join Date
    Jan 2020
    Location
    Pinole, Ca
    Posts
    2,261
    Thanks (Given)
    36
    Thanks (Received)
    283
    Likes (Given)
    924
    Likes (Received)
    867
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Yeah, you won't get performance gains, it will actually make your motor run horrible. You have to swap ECUs & regs together (or re-chip). If you have a feeling your ECU is a bit off because you did mods to the block then you can go to an adjustable and make little tweaks to the whole RPM range. You can add a couple psi and make it a little richer all around to compensate for the porting/increased flow.

    I run one and love it!

  5. Likes Trevor Sawyer liked this post
  6. #5
    Join Date
    Jun 2014
    Location
    United States
    Posts
    147
    Thanks (Given)
    2
    Thanks (Received)
    6
    Likes (Given)
    29
    Likes (Received)
    40
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    On my modified 2.5 225, that R32 ecu burned a piston, and according to my pyrometers was too lean to stay in a safe temperature range. I’d go with an ACU from Brucato and a steam wheel. Even with an adjustable regulator I couldn’t get the temps down by increasing fuel pressure. This is just my personal experience.

  7. Likes 25two.stroke, pkstv liked this post
  8. #6
    Join Date
    Dec 2004
    Location
    Frankfort KY
    Posts
    763
    Thanks (Given)
    0
    Thanks (Received)
    5
    Likes (Given)
    3
    Likes (Received)
    36
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The stock R32 promax ecu will be too lean and not supply enough fuel for the porting done to the motor. I would look into a Powers for a Ecu.
    1998 SS 2000 94 260ss
    Speed cost how fast you want to go
    Allison and Merc is there anything else?

  9. Likes gmorgan, pkstv liked this post
  10. #7
    Join Date
    Sep 2008
    Location
    louisville
    Posts
    185
    Thanks (Given)
    40
    Thanks (Received)
    17
    Likes (Given)
    445
    Likes (Received)
    91
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I own a 225 promax with a 56 psi fuel regulator and a brucato ACU that’s got a 260 fuel curve mapped for 56 psi . You need to use the correct regulator psi that your ACU is programmed for .

  11. #8
    Join Date
    Aug 2007
    Location
    North Eastern North Carolina
    Posts
    8,179
    Thanks (Given)
    230
    Thanks (Received)
    344
    Likes (Given)
    254
    Likes (Received)
    1352
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I agree!! But if he has or can get a 11350 Digital ECU he can change Chips from a A48 (39psi) to a A63 (56 psi.) John Marles Burns Chips for $75.00 each. He can even put a special curve in one for the asking. I carry several of them in My Tool Box at races.

    Quote Originally Posted by Dave Strong View Post
    That ECU is mapped for 39psi regulator so going to 56psi will just make it run rich. If you want to go 56psi you should get an ECU with a 56psi curve.

    Dave
    Bud Conner "Heathen" "Defending Our Constitution"

    FOR ALL ENGINE APPLICATIONS
    DRY Film Lubricant for Piston Skirts & Cranks + Thermal Barrier Ceramic Coatings for Piston Tops, Combustion Chambers, Valves etc !!



  12. Likes Dave Strong, pkstv liked this post

Similar Threads

  1. Fuel pressure regulator
    By dbug10 in forum Technical Discussion
    Replies: 6
    Last Post: 03-02-2015, 11:29 AM
  2. Do I need to run a fuel pressure regulator with a Holley Red fuel pump?
    By Steve2ManyBoats in forum Technical Discussion
    Replies: 14
    Last Post: 03-31-2011, 08:09 AM
  3. Recommended inline fuel filter and fuel pressure regulator
    By topkick in forum Technical Discussion
    Replies: 2
    Last Post: 09-20-2005, 09:25 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Aeromarine Research