Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Anyone know the fuel pressure a TBI pump makes?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 84_Chevy_K10, Jun 29, 2001.

  1. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    My friend is putting a carburated engine in his TBI truck. I know TBI is fairly low pressure, but low enough for a carb? I think it's 10-13, which is too much, but a pressure regulator could bring that down to the 4-7 range.

    At any rate, what kind of pressure does a TBI pump make?

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  2. newyorkin

    newyorkin 1 ton status

    Joined:
    May 8, 2001
    Posts:
    16,555
    Likes Received:
    157
    Location:
    Los Estados Unitos
    I believe you are correct, 10-15 psi from a TBI pump.

    Ratch
    <A target="_blank" HREF=http://k5.8m.com>http://k5.8m.com</A>
    **K5 - What more is there to life?**
     
  3. michaelm

    michaelm 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    872
    Likes Received:
    0
    the reg is what sets the pressure that the pump maintains.
     
  4. Sparky87k5

    Sparky87k5 1/2 ton status

    Joined:
    May 6, 2001
    Posts:
    726
    Likes Received:
    0
    Location:
    Lynden, Washington, 4 miles from Canada
    Make sure you use a regulator that has a port to cycle excess fuel pressure back to the tank, otherwise you'll burn your fuel pump up in no time. Look for a 3 port fuel regulator, incoming, carb & return. I run one and set carb pressure at 5-6psi for a Holley. It's also an excellent way to keep from experiencing vapor lock.

    87 K5, D60 & 14FF, 5 sp & NP208 & 383 stroker. Build it Bulletproof and take it fishing!
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    Cool. Any suggestions as to what kind of regulator to choose, where to get it, and how much?

    This kid was going to buy two sending units and run a mechanical pump! Good thing I told him that wasn't necessary, what a waste of work.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    I ran a regulator from Summit in this kind of application with no problems at all.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     

Share This Page