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Thread: compression

  1. #1

    compression

    what is the compression ration for a stock 1990 454 fuel injected

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Feb 2009
    Posts
    510
    About 7.6-8 to 1 ,not much

  3. #3
    i want to up the compression just for a stree rod its in a ss truck what can i do

  4. #4
    Senior Member EXPERT BUILDER
    Join Date
    Nov 2008
    Posts
    263
    well if ur lookin to rabuild just have some head work done and get some flattop pistons
    but i fnot u could just buy some new heads with a smaller combustion chamber
    and if u dont want to spend that money u could even cheap out and just take the heads and have a valve job done and have them mill the heads down a few ccs

  5. #5
    i was thinking of buying new heads and cam but don't know what to go with

  6. #6
    Senior Member EXPERT BUILDER
    Join Date
    Nov 2008
    Posts
    263
    dart iron eagles are the best for the money
    but world makes a good head too and they're a lil cheaper
    and cam wise i say a comp or voodoo prolly around a 520 lift

  7. #7
    thanks that should wake it up some. still trying to figure how much horse power it came with from factory

  8. #8
    Senior Member EXPERT BUILDER
    Join Date
    Nov 2008
    Posts
    263
    i figure it prolly came with about 400 give or take a few

  9. #9
    thats what i figured to but the heads they put on it suck got to wake it up and let it breath if u know what i mean

  10. #10
    Senior Member EXPERT BUILDER
    Join Date
    Nov 2008
    Posts
    263
    does it have headers, true duals, intake, etc.


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