Going with 1.6 full roller rockers
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5.0 and 5.7 Discussion, Going with 1.6 full roller rockers in Cadillac Engine Technical Discussion; I have finally decided to go ahead and add some 1.6 roller rockers to my engine. Engine is a 383 ...
  1. #1
    VortecCaddy is offline Cadillac Owners Member
    Automobile(s): 1990 Cadillac Fleetwood Brougham
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    BALTIMORE, MD
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    Going with 1.6 full roller rockers

    I have finally decided to go ahead and add some 1.6 roller rockers to my engine.

    Engine is a 383 with GM Fast Burn Heads. LT4 HotCam.

    I will post results and pictures once complete. Maybe we can get a thread dedicated to our own engine mods.


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  3. #2
    Hogg is offline Cadillac Owners Member
    Automobile(s): Cadillac 1998 STS
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    Re: Going with 1.6 full roller rockers

    asically you are running the ZZ383 except you are using the LT4 Hotcam.

    Check out this thread.

    http://www.pacificp.com/forum/viewtopic.php?t=317

    Lets you fuel whatever you want. I run this in my 97 Vortec 350 reg cab shorty.

    And a PCM update(no more 5900rpm rev limit as is forund on the 1996-2000 blackbox PCM's.)
    http://www.pacificp.com/forum/viewtopic.php?t=3240

    peace
    Hog

  4. #3
    VortecCaddy is offline Cadillac Owners Member
    Automobile(s): 1990 Cadillac Fleetwood Brougham
    Join Date
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    BALTIMORE, MD
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    Re: Going with 1.6 full roller rockers

    Essentially that's what it is. As far as the PCM, just bout a OBDII conversion from dynamicefi.com It lets you :flash on the go" and gives you a "heads up" display via laptop.

    All the work is done and the rockers are a great compliment to the engine. Pulls hard until around 6000. As soon as I fugure out how to post pics I will.

  5. #4
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
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    Re: Going with 1.6 full roller rockers

    One thing for sure, the roller tips are easier on valve guides, as opposed to the stamped types, which sort of push valves side-ways somewhat. I never use stock stamped rockers on a rebuild.
    6000 rpm sounds like a nice number

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