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Thread: 350 Tuning Help

  1. #1
    Fuel Injected!
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    Jan 2018
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    350 Tuning Help

    Hi All,

    I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

    I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

    Any information would be very helpful.

    Thanks!

  2. #2
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
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    3,713
    I've tuned some "Vortec" 350 TBI engines. Usually stock 454 injectors and stock 454 fuel pressure will work fine. Stock 350 injectors with 18 psi is an option also.

    I use the Ostrich 2.0 to tune with.

    Sometimes there is a trade-off with TBI injectors, with either lean / rich at idle or lean / rich at upper RPM's. Sometimes the injector trade-off at idle is rich, but upper RPM's are great.

    Seldom do the engines I tune get time on Chassis Dyno, but one of the Vortec 350 engines I tuned made 330 RWHP with stock 454 injectors and stock fuel pressure.

    dave w

  3. #3
    Fuel Injected! kacy's Avatar
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    Jun 2016
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    St. Louis Mo Area
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    Quote Originally Posted by bgott View Post
    Hi All,

    I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

    I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

    Any information would be very helpful.

    Thanks!
    I have a cam with those spec by a different brand name I am still trying to tune. if you havent already contact a cam manufacture and tell them what you have and what you want it to do and they will recommend a cam. I didnt do this and think I may not be as happy as i thought with it.

  4. #4
    Fuel Injected!
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    Feb 2013
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    Euless, TX
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    1,603
    Quote Originally Posted by bgott View Post
    Hi All,

    I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

    I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

    Any information would be very helpful.

    Thanks!
    I have run 232/240 @ .050 on a 110 LSA in a 10.5:1 383 TPI with Vortec heads and SLP runners using the later 1993-1995 TBI PCM. The PCM can handle ALOT more cam than the so called experts claim.

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