TBI for Buick 350

Discussion in 'Jeeps with the Buick Heartbeat' started by sean Buick 76, Jan 31, 2010.

  1. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Good question! I am doing a Multi-port EFI setup on my Twin Turbo 350 build using a megasquirt computer. Yes it requires a modified fuel tank, expensive high pressure fuel pump ect. This is a pretty expensive option however it wil be the best for the 700-1000 hp range I wil be at.

    I am using a custom intake for the MPFI however here is a TA intake modified for MPFI in this thread:

    http://www.v8buick.com/showthread.php?t=193177

    This is the easiest way to get EFI on your jeep:

    http://www.professional-products.com/EFI_3.php

    Another option I am working on now for the stock type 350 is using a GM TBI unit and a Megasquirt to control. The TBI is only 480 cfm so it will not be a high rpm race setup but for a Jeep it would offer improved drivability, and most likely fuel milage. There are also 680 holley TBI units that can be found used as well as marine application GM TBIs that are also higher cfm than stock. Another highlight of this setup is that with a simple adapter it could be used on the stock 2bb intake you jeep people have.

    Using this type of setup requires far less fuel system modification due to the low fuel pressure required. This is the cheepest option but takes more time and work than the others:

    http://www.mez.co.uk/ms1.html

    http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_chevy_smallblock_v8_v6.htm
     
  2. swampedge

    swampedge Well-Known Member

    Take the guts from an GM tbi distributor and put it in the Buick dist and just use the chevy 350 or 454 tbi. Plug and play. Simple right. That's what I'm going to do. If I have to I'll just machine a billet dist or make adapters to use the chevy dist.
    Jim
     
  3. Tim N.

    Tim N. Platinum Level Contributor

    Interesting. Have you done anything on this project yet?
     
  4. swampedge

    swampedge Well-Known Member

    I'm just getting to the point where I can sit down and do some engineering on this. I've looked all over and can't find a factory distributor that can be crossed over and dropped in so it appears I'll have to make something. I'll keep you guys posted. Keep prodding me as sometimes I end up on a tangent and forget where I really need to be.
    Jim
     
  5. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Check out my distributor on my Thread. I'll copy the post over.
     
  6. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Just replace the high pressure pump with a Universal TBI pump.

    Here is a picture under the hood of my '67 Thunderbird with a 428 FE engine. I used a Holley 670cfm Throttlebody and 85lb/hr injectors. I don't know if I'm injector limited yet, I have voltage issue in the charging system wrecking havoc on my tuning (after some testing today I'm fairly certain my alternator is the culprit).

    I have the mechanical pump on the block pumping to a surge can buried on the right (same style as my Skylarks). You can see the first fuel filter just to the right of the radiator cap (between the mechanical pump and surge can), and the second one just after the electric fuel pump mounted on the A/C bracket.
    [​IMG]
     
  7. Tim N.

    Tim N. Platinum Level Contributor

    Did you use an HEI distributor?
     
  8. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    The Ford runs a stock points distributor with Pertronix, the megasquirt doesn't do any ignition control (yet) on the Ford. The Buick 455 runs the odd-fire 231 HEI distributor with the pick-up coil, reluctor and distributor gear swapped out to work with the 455. The Buick 350 could use the same distributor gear as the 231.
     
  9. swampedge

    swampedge Well-Known Member

    This is what I was thinking but wanting to some how keep my 4 lead module in my dist instead of externally mounted on a heat sink. I have a stock chevy ecm and a moates modified unit as well. My Jeep has already run TBI but with a Duraspark distributor as a trigger when I had the AMC 360 in it. Thanks for the post over.
    Jim
     
  10. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Great info!!
     

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