1970 stage 1 block details maybe?

Discussion in 'Street/strip 400/430/455' started by 72 skylark custom, Apr 30, 2019.

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  1. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Not much un-shrouding on the exhaust compared to the intake. Air in seems to be a bigger challenge than air out.
     
    BuickV8Mike, May 3, 2019
    #21
  2. Bens99gtp

    Bens99gtp Well-Known Member

    if your buying everything from scratch it doesn't make any sense to buy anything but the stage 2. from new it's about the same price
     
    Bens99gtp, May 3, 2019
    #22
  3. 72 skylark custom

    72 skylark custom Well-Known Member

    Are those your personal stage 1 se heads that you run on your car? Those do seem to flow pretty well by the numbers, if you do run them how well do they run on your combo? And yes everything would be bought pretty much from scratch or new
     
    72 skylark custom, May 3, 2019
    #23
  4. Bens99gtp

    Bens99gtp Well-Known Member

    if you never plan to race or run big lift the se2 are great


    these are my TE stage 2 heads with cnc porting. and these heads can go over 400 with more work later on.

    but you can see they give up some low lift numbers but really shine over .500......these have guide to seal contact at .730........if I had to money to go roller at the time i think i could get another 25+ hp by getting the valve in the .500+ lift sooner........and longer
     

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    Last edited: May 3, 2019
    Bens99gtp, May 3, 2019
    #24
  5. 72 skylark custom

    72 skylark custom Well-Known Member

    With the stage 2 heads im guessing that the bigger lift cam you have the better the heads will flow
     
    72 skylark custom, May 4, 2019
    #25
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    The heads are capable of flowing more air at all lifts, maximums depend on porting, but in general, the aluminum heads will outflow the best iron ported heads right out of the box. The better your head flow, the smaller the cam can be and still achieve your power goals. Smaller cams are more civilized on the street in real world street driving. Bigger cams with their lower vacuum, rougher idle, reduced low end power, get old really fast. Bigger cams require steeper rear end gears and higher stall converters.
     
    LARRY70GS, May 5, 2019
    #26
  7. 72 skylark custom

    72 skylark custom Well-Known Member

    I have to get the head kinda set up for the cam i would run with them right? And the cam i would go with would be more than likely middle of the road. Some thing not super massive that cant be streetable but not stock either. Maybe something in .500 range with stage 2 heads?
     
    72 skylark custom, May 5, 2019
    #27
  8. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    You are overthinking this. You do not have to set up the heads for the cam. There are no downsides to porting until you start to enlarge ports. That can drop velocity and hurt the low end. The type of porting I am talking about enhances flow at all lifts without hurting velocity. The cam, any cam, takes advantage of that. The bigger the cam, the more so this is. I'll say it again, the better the head flow, the better your cylinder heads are, the smaller the cam has to be to attain whatever power goals you wish to attain. If you want to make more power, you can always install a bigger cam without touching the heads again unless you want to do more porting, but that would be unlikely IMO.
     
    LARRY70GS, May 5, 2019
    #28
  9. 72 skylark custom

    72 skylark custom Well-Known Member

    Sorry guys i over think a lot of things lol thanks larry and everyone else i appreciate all the advice and help. It will come in handy on the build
     
    72 skylark custom, May 5, 2019
    #29
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