425 Dyno Results

Discussion in ''Da Nailhead' started by urslo, Jun 15, 2012.

  1. 66gsconv

    66gsconv nailhead apprentice

    Urslo, if your wife starts running it up past 5500 I think it wont be doing much but just spinning. Tell her to do what Joe says and shift it at about 5400 and she will do real good from a 10 mph punch:3gears: :shock:
     
  2. kitabel

    kitabel Well-Known Member

    That card is strange. In the diagram, the intake and exhaust curves are reversed. The spring pressure is backward, it shows open pressure less than closed pressure.
     
  3. doc

    doc Well-Known Member

    Dang kit, you cant figure that out???:laugh::laugh:
     
  4. gsgtx

    gsgtx Silver Level contributor

    Ron, after talking with cam people and engine builders a roller cam is like having 1 bigger cam size then a non roller cam. so your cam is like a 221- 228 non roller, which is a perfect size for your nailhead.
     
  5. speedtigger

    speedtigger 9 Second Club

    Wow. I had no idea those motors were capable of power like that. Most impressive.
     
  6. 66gsconv

    66gsconv nailhead apprentice

    It seems what ever you do to build HP they still build good TQ.
     
  7. doc

    doc Well-Known Member

    Tigger,,,,,, ''Never sell a nailhead short'',,,,,,,:Brow::laugh::laugh:
     
  8. speedtigger

    speedtigger 9 Second Club

    Now I know.
     
  9. 66gsconv

    66gsconv nailhead apprentice

    urslo, was this a stock intake manifold?
     
  10. urslo

    urslo Member

    Intake was a modified factory 4 barrel. Cut out the carb ports and left the center divider, port matched to the heads.
    They had a 2" spacer under a loaner 835 Barry Grant carb for dyno purposes.
     
  11. doc

    doc Well-Known Member

    That made my day,,, that engine had a ''Doc dual plane'' mod. intake manifold.....Now, I got a new phrase,,,,,''Never sell a Doc dual plane short"......Made my day,,,:Brow::Brow::Brow::Brow::laugh::laugh::laugh::laugh:Made my day,,,,Made my day.....
     
  12. rsmalling

    rsmalling Well-Known Member

    Sweet! :TU:
     
  13. 66gsconv

    66gsconv nailhead apprentice

    Hi Urslo, I dont know if I missed this but was wondering what spring pressures the ls1 springs are that you are using?
     
  14. 66gsconv

    66gsconv nailhead apprentice

    Ok , just seen the cam card and answerd my quistion
     

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