TA Performance SP3 injector install

Discussion in 'High Tech for Old Iron' started by DauntlessSB92, Jan 8, 2016.

  1. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Just received my Holley HP EFI system yesterday and I'm excited to get started on converting the new SP3 intake for my Buick 350 to an injector manifold. I recently dropped it off at my machinist and we discussed the best plan of attack.

    The first issue that's come up is this: are those bosses on the runners really intended for efi or are they nitrous bosses? We've debated attempting to mill away the bosses and just use the supplied injector bungs.

    Does anyone have any pictures of a TA manifold with injectors in it?
     
  2. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    My 455 SPX intake appears to be drilled from the casting. The only welding was the stand for the injector rail mount.

    [​IMG]
     
  3. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    And the bottom side.

    [​IMG]
     
  4. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Awesome that makes me feel a lot better about using the provided bosses in the manifold. I was confused because it seemed several people thought they were unsuitable for injectors. Is the height of the bosses acceptable as cast or should they be milled down a bit?

    I'm hoping all this work ends up less than $500. I guess I can't exactly name my price though considering how difficult it would be to find someone else willing to do this.
     
  5. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    I was under the impression that for best results the injectors must spray directly at the intake valve? That seems like it would hit the floor pretty quick..
     
  6. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Ideally you would want the inclusion angle to be aimed at the valve for best fuel atomization and fuel economy. To aim the injector at the valve though could cause clearance issues with the manifold plenum since its a carb manifold. So many agree to have the injectors mounted vertically is acceptable. Some even think the airstream moving past the injector at that angle would aid in atomization.

    This fuel injection setup will be superior to a carb in day to day driving but will still fall short of a modern engine I'm sure.
     
  7. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!


    No dig intended... That's a wicked cool setup!
     
  8. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    I don't take it as a dig, I definitely appreciate any advice as I'm totally new at this. I don't know of anyone who is running sequential fuel injection on the 350 so I'll give it a shot. My biggest concern is mounting the crank sensor since the 350 timing covers don't have mounting boss like the TA 455 covers do. Once all this is done I can start buying stuff for the turbo setup
     
  9. Mart

    Mart Gold level member

    Let everyone know how this works out........sounds cool.!
     
  10. Mart

    Mart Gold level member

    GSJohnny it (JB). Should work.
    If it stops fireing, you'll know what to look for......
     
  11. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Haha that's true Johnny sure has tried a lot of things and made them work out. I shouldn't have to worry about jb weld or any welding in this situation as I'll be trying to use the bosses already cast in the manifold. The sp3 also has threaded bosses next to the injector bosses which I'll use to secure the fuel rails. So ideally no welding will be required. I'll post as much as I can about this because I do believe fuel injection will help breath new life into a lot of older motors that are being swapped for an LS. Not saying the LS swap is bad but id rather see more Buick motors.

    I'd like to get some dyno time in too Once I'm done so I can dial in the tune and also see how much power I'm making before the turbos. I'm hoping for an optimistic 280+ to the wheels.

    My stock motor before I wiped the cam was making close to 240 to the wheels if my track times are any indication
     
  12. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Yeah, laying them over to go more towards the valve would be nice, but it's non-critical. And at least on mine, it's kind of an optical illusion, but it's not 90 to the port, it is angled down the port somewhat because the port is angled down into the head.

    If you are not running a mechanical fuel pump, the fuel pump bolts would likely make a great place to bolt a crank sensor bracket too. You'd probably want a bracket that angles downwards around 45 to lower the sensor enough not to block the timing tab, but the sensor location on the engine is practically irrelevant if you haven't permanently set your trigger wheel in place yet. You can even place it on the right/passenger side of the engine. Just have to have the missing tooth pass by the sensor by a couple teeth before TDC.

    Again, this is a 455, but the principle is there. Alternatively just pick any timing cover bolt.
    [​IMG]
     
  13. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    You are right it should be that bad but in comparison everything else is practically bolt on. The harnesses will be a little tricky for me but compared to some aircraft wiring messes I've seen I'm sure it will be okay.

    I forgot about using the fuel pump location for a bracket. That would work out nicely. Since I've ordered a timing cover from TA it doesn't come with a timing tab I don't think so I'll have to figure that out as well.

    It really helps seeing the pictures of your build. If it wasn't for you I wouldn't have known about the escort trigger wheel. I've always envied the setup you have so it's cool to be finally moving towards an efi motor. I'm building this 350 Not to make the most power or be the quickest at the track but to do something different and learn in the process.
     
  14. afracer

    afracer Well-Known Member

  15. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Glad to help!
     
  16. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    I certainly hope it's not $500. The machinist will be giving me a quote on Monday. It doesn't seem to be too difficult but if he offers to do it for a reasonable price I'd certainly rather have it done with a bridgeport and someone with experience.
     
  17. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    I know many people are better skilled at fabricating than I, but a bridgeport should make it perfect and easy. I've built/modified two intakes for EFI using a drill press and grinder, and can tell you both have injector to fuel rail alignment issues. The o-rings are very forgiving so it doesn't leak, but parallel isn't in my skill set.
     
    67wild likes this.
  18. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Machining certainly isn't in my skill set at all. Its why I'm not a sheet metal guy at work.

    I had my fill doing the oil mods on my motor and decided it wasn't my cup of tea. I'll leave it to the pros. As for anything else on my car I won't let anyone touch it but me.

    It's another reassurance to know that things don't have to be spot on to work out. I just hope everything clears once it's installed
     
  19. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Holy car parts and wiring Batman [​IMG][​IMG][​IMG][​IMG][​IMG][​IMG]
     
  20. pmuller9

    pmuller9 Well-Known Member

    This is going to be such a great project!!
    Great choice in EFI equipment.

    This may sound basic but the one thing to watch for is the intake manifold needs to be machined so that no part of the bottom "O" ring of the injectors go beyond the hole into the port.
    We had to redo a manifold from a shop that does this type of work and I've seen others make the same mistake.

    Paul
     

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