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Thread: Vortec head 355 TBI

  1. #1
    Carb and Points!
    Join Date
    Jul 2015
    Age
    40
    Posts
    5

    Vortec head 355 TBI

    Setup Rundown:

    77 4 bolt "010" 350 block .030 over
    Speed-pro flat-top hyper. pistons
    Vortec 062 heads, with valve guide bosses cut down and screw in studs
    About 9.6:1 compression
    Chevy Performance 1.5 stamped rockers
    Hardened Pushrods
    Edelbrock Performer RPM 7116 Vortec 4 barrel intake
    Trans-dapt TBI adapter
    91 9C1 Caprice TBI unit with 65 lb injectors, 18 psi spring in reg, and a TPI Fuel Pump
    Comp Cams XE 12-256-4 cam
    Long Tube headers
    160 degree thermostat
    Built 700R4 with 2800 stall

    This is all currently going into my 92 Caprice LTZ
    My question is will this setup run on a 93 LTZ 350 chip (AYKC) just long enough for me to break in the flat tappet cam? About 30 minutes at 2000-2500 rpm? After break in will it be safe to drive it on this program until I'm able to find someone close by to tune it or save up and get a mail order chip?

    Also since I'm going from an L03 305 to flat tappet 355 what knock sensor and esc module would I go with? I wouldnt just use one from a L05 350 since they are roller, am I right? I'm guessing I'd need one from a early TBI truck with flat tappet is this correct?

    Thanks,
    Seth
    Jenkins, KY
    Last edited by dmsdak; 07-20-2015 at 01:56 AM.

  2. #2
    Fuel Injected!
    Join Date
    Jul 2012
    Location
    Fresno, CA
    Posts
    422
    It might, but you'd be better off getting a starter chip from someone here. I'd want to start with something that has injectors and fuel pressure taken into account at a minimum. For the knock and ESC, I'd agree with going with the truck components (but I don't play with the car systems much, so take what I say with a grain of salt).
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

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