AFR 355 vs. Vortec 383

Discussion in 'High Performance Modifications' started by Led Zep, Mar 14, 2008.

  1. Led Zep

    Led Zep Veteran Member

    Mar 13, 2008
    Starting with a 350 .30 over,and looking to run pump gas,say 10ish max.THe AFR's are around 1500,and 383 bottom end and vortecs put me in about the same ballpark,price wise.Flat tappet cam,suggest specs?

    Pros and Cons,both engines.How would they stack up against one another?Does the extra flow of the AFR surpass the torque advantage of the 383?More or less,if you had 1500 cash,which would you build.Thanks.
  2. CamaroMan79

    CamaroMan79 Veteran Member Lifetime Gold Member

    Jun 10, 2001
    Selah, WA
    IMO I would build the 383 w/ the vortecs because you can always swap out heads later on.
  3. KylePBZ

    KylePBZ Veteran Member

    May 5, 2006
    So. IL
    Get the heads now, you can always put them on a bigger short block later on! lol
  4. camaronut79

    camaronut79 Veteran Member

    Nov 11, 2005
    destin area, fl
    build the 383 then find a used set of AFR's:cool:
  5. LILRED406

    LILRED406 Veteran Member

    Jan 30, 2008
    I agree.

    vortecs are really good i seen a article a few years ago were they tested the 100% cnc afr 180s vs bone stock vortecs
    the afrs made like 55 mores horse but lost 5 lbs of tourqe.

    I think a touched up set could make 500 horse 500 tork on a healthy 383.
  6. Led Zep

    Led Zep Veteran Member

    Mar 13, 2008
    So,the 383 would be the better bang for buck motor?Could someone DD or EA both engines,say AFR 180's vs Vortec 170's,using a flat tappet cam,using the good old comp 280 duration/480 lift.Thanks.
  7. BlackDog82

    BlackDog82 Veteran Member

    Jul 29, 2003
    State of Confusion
    ..... a member on a Corvette-based Forum I frequent has a 9.7:1 CR 383 SBC, iron Vortec heads, CCXE262 cam, Lars Qjet, Dynomax headers, 2.5" duals, 3000 stall converter, TH350, 3.73:1 rear:
    his C3 runs 12.90s @ 105 MPH on rock-hard BFG T/A Radials, which isn't bad for a 'nuthin'-fancy' car
  8. fiscus

    fiscus Veteran Member

    Apr 2, 2007
    montreal, qc
    I have a 9.3:1 vortec 383 with an xe-262 in my camaro, 600cfm carb, 2.41 gears and a wide ratio saginaw tranny, and it ran a 13.87@106.2mph (never even got into 4th gear!). That was my first time out and on ancient 14" tires with a 2.29 60 ft, and 87 octane. I just changed out my gears to 3.42 and I'm putting drag radials, subframe connectors and a new transmission and hope to get down to a 12.9 with it!
  9. Marv D

    Marv D Veteran Member Lifetime Gold Member

    I'll say this again.... Pick the best head you can possibly afford, FORGET about everything else for now,, start with the heads.
  10. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

    New guy has a funny screen name.... [​IMG]

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