Page 6 of 6 FirstFirst ... 23456
Results 101 to 106 of 106

Thread: Mpfi intake swap vortec 5.7

  1. #101
    Advanced Tuner
    Join Date
    Feb 2016
    Location
    Texas
    Posts
    534
    My biggest challenge tuning this combo was transient fueling no doubt. There was some minor clearance issues with the factory a/c bracket I used injectors from an 01 6.0 lq4. The setup with the stock top end put down 259hp@ 4900rpm / avg 310 torque from 1900-4000. That was through an nv3500.

    I never completed the cpc swap just built some brackets to mount the coils. Still running stock type distributor setup. Just using a marine type at the current time. Never got a chance to dyno the truck after the cam swap and milling the heads. If I were to guess ide say its probably putting down just over 300 to the tire. Through the 4l80 & Fti 3800 9.5" converter. Im curious what injectors your using?
    Last edited by Oleblu; 01-21-2020 at 07:52 PM.
    97 ext cab short bed silverado 5.7 411 swap, edelbrock 29135 intake, lightly ported 906 heads milled .035 thou. factory press in rocker studs & rockers, comp 787 retainers & stock locks, ls6 springs. Comp cams 08-503-8 T56 swap

    86 SWB crate vortec 5.7/th350 The wife's truck

  2. #102
    Potential Tuner
    Join Date
    Jan 2020
    Posts
    2
    I haven't bought any injectors yet, but was originally planning on using Delphi EV1 injectors that would supply about 29 lbs/hr @ 58 psig when using the Edelbrock direct fuel rail mount pressure regulator. Would the LS 6.0 LQ4 injectors be a better choice? (what do they flow @ 58 psig?).
    What is the CPC swap involve (what coils were you planning to use, and how are they each individually triggered by the 0411 ECU vs using the OEM distributor?), and how come you never completed that swap?

    By the way, I'm planning to use GM aluminum Fast Burn heads with the LT4 roller rocker arms, and a ZZ4 cam along with LT1 exh manifolds on my 42K mile '99 Vortec 350 engine in my '93 4x4 S10 swap. I picked up all of these parts some time back for an AWD conversion using a '96 Bravada AWD T-case mounted to a '98 4x4 4L60E tranny. I built a custom eng harness using two '01 4.3 V6 S10 eng harnesses with a custom jumper between the eng harness connectors and my '93 S10 firewall connectors. The ECU will be mounted to a standard '01 S10 coolant recovery tank that is modified to fit on the passenger side inner fender of my '93 4x4 S10. Will use all of the standard 5.7 Vortec accessories on the swap, so I will modify the AC comp bracket to fit the fuel rails if need be for clearance, though it appears that the Edelbrock setup will fit without any problem as far as I can see right now!

  3. #103
    Advanced Tuner
    Join Date
    Feb 2016
    Location
    Texas
    Posts
    534
    Biggest reason for not completing the swap yet was.

    https://www.eficonnection.com/home/p...nc-distributor

    I just wasnt going to fork out the cash for the kit yet. Once I resolved all my issues running the factory distributor. I couldn't see spending $375 to change out working parts. I believe I calculated the injectors to 27-28 lbs/hr. Nothing special about them. I used them because my good friend had them laying around once we had finished his single turbo build.

    From what I remember the clearance issues I had were with the ect boss. Nothing that a good radius around the corner of the bracket wouldn't fix.
    Last edited by Oleblu; 01-24-2020 at 06:55 AM.
    97 ext cab short bed silverado 5.7 411 swap, edelbrock 29135 intake, lightly ported 906 heads milled .035 thou. factory press in rocker studs & rockers, comp 787 retainers & stock locks, ls6 springs. Comp cams 08-503-8 T56 swap

    86 SWB crate vortec 5.7/th350 The wife's truck

  4. #104
    Potential Tuner
    Join Date
    Feb 2021
    Posts
    1
    Sorry for jumping down the rabbit whole here in an old thread, intrested in doing a 0411 swap on a gen 6 454 in the near future and I'm trying to find research about swapping the intake manifold. I know the harness for the big block and small block is diffrent, but when you swapped intakes were you able to use your existing injector harness or did you have to swap it out?

  5. #105
    Advanced Tuner Obsolete489's Avatar
    Join Date
    Feb 2017
    Location
    Yankton, SD
    Posts
    299
    Your injector harness should be fine, just might have to lengthen one side of it. You'll need new fuel rails, and some lines. Honestly I'd ditch the factory FPR at this point too.
    2000 K2500 - 489 CI Vortec w/ comp XE270 cam - 0411 swap and rear mount turbo
    1972 M35a2
    2011 LML Duramax

  6. #106
    Advanced Tuner
    Join Date
    Feb 2016
    Location
    Texas
    Posts
    534
    Like obsolete stated the harness should work. you could buy adapters to lengthen the harness/change connector ends should you choose an ev6 or multec type injector or any other. the factory harness is setup with ev1 connectors. There are some decent fuel pressure regulators at fair price on the market now days. I am using the corvette fuel filter pressure regulator. Years ago they were $55-60 they have quick connections same as gm has used for years on fuel rail connections.
    97 ext cab short bed silverado 5.7 411 swap, edelbrock 29135 intake, lightly ported 906 heads milled .035 thou. factory press in rocker studs & rockers, comp 787 retainers & stock locks, ls6 springs. Comp cams 08-503-8 T56 swap

    86 SWB crate vortec 5.7/th350 The wife's truck