Best build for a 400hp 350 on budget

Discussion in 'Engine Topic' started by Gregg, Mar 6, 2017.

  1. Gregg

    Gregg Member

    Messages:
    45
    Likes Received:
    0
    Joined:
    Mar 3, 2017
    I have a Chevrolet 350 block 3970010 4 bolt main and I'm looking to get somewhere between 400 and 450hp out of it , what's the best options on a budget?
     
  2. GoldenOne7710

    GoldenOne7710 Equal Opportunity Offender Lifetime Gold Member

    Messages:
    4,651
    Likes Received:
    341
    Joined:
    Jun 23, 2004
    Location:
    Athens, GA
    What's the budget?
     
  3. fatkid_racing

    fatkid_racing Veteran Member Lifetime Gold Member

    Messages:
    1,049
    Likes Received:
    90
    Joined:
    Sep 21, 2005
    Location:
    Saginaw Texas
    Good short block prep with proper clearances (rod,main,rod side clearance piston gap etc). Vortec heads with a drop in spring kit or have the guides cut, .028" thick head gaskets and self aligning roller rockers.

    Retrofit hydro roller cam in the 220/230@.050 range 500ish lift, RPM airgap intake, 1-5/8" headers, 600-650cfm carb, good quality HEI with a decent curve 30-32 degrees total timing.

    Attached is a pic of the dyno results before tuning. 375 hp at the crank before carb tuning and ignition curve
     

    Attached Files:

  4. Edem_Alive

    Edem_Alive Veteran Member Lifetime Gold Member

    Messages:
    464
    Likes Received:
    9
    Joined:
    Dec 18, 2015
    Location:
    Montana
    I put vortecs on a 360 but went with flat tappet instead of retrofit rollers. RPM airgap also. Hoping to be around 400 hp but it wasn't cheap. Would go the LS route if I did it again.
     
  5. djkaplan

    djkaplan Veteran Member

    Messages:
    162
    Likes Received:
    1
    Joined:
    Mar 27, 2016
    Location:
    Victoria, bc
  6. djkaplan

    djkaplan Veteran Member

    Messages:
    162
    Likes Received:
    1
    Joined:
    Mar 27, 2016
    Location:
    Victoria, bc
    I take what I said back. buy a 5.3ls get the carbed intake and ignition box, cam and valve springs.
    youll have 6bolt mains and 450hp probably for less then 1000bucks.
     
  7. Rdobbs1977

    Rdobbs1977 Huge Guns N Roses Fan

    Messages:
    284
    Likes Received:
    10
    Joined:
    Dec 1, 2014
    Location:
    Nashville
    ^^best response i've seen as of right now. Still not enough information though from Gregg. For starters what do you even know about the block? What if any parts do you have? What application are you shooting for?
     
  8. Gregg

    Gregg Member

    Messages:
    45
    Likes Received:
    0
    Joined:
    Mar 3, 2017
    Just getting ideas of what I would need and a cost.
     
  9. Rdobbs1977

    Rdobbs1977 Huge Guns N Roses Fan

    Messages:
    284
    Likes Received:
    10
    Joined:
    Dec 1, 2014
    Location:
    Nashville
    At the very least can you say one way or another if you have any parts whatsoever or just the block and nothing else? If you do have some parts, i'd be interested in what type of heads you have.

    Its hard for someone to tell you what you need when you've not really provided much information, come on!!
     
  10. larrylarry

    larrylarry Veteran Member

    Messages:
    1,531
    Likes Received:
    68
    Joined:
    Dec 22, 2011
    Location:
    San Antonio Tx
    A 6 liter LS with headers is all that is needed for 400 hp
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.