351 Block Power...?

Discussion in 'Technical' started by Maxx Levell, Oct 5, 2011.

  1. Maxx Levell

    Maxx Levell Member

    Joined:
    Mar 10, 2002
    Messages:
    1,038
    Likes Received:
    107
    Trophy Points:
    222
    Garage:
    1
    Location:
    Henderson, KY
    Vehicle:
    1972 Mav 2 dr, 1971 Mav 2 dr...thanks Old Guy!
    Whats the consensus on how much HP I can safely throw at a factory 351 roller block? I know on the 5.0's that once you start approaching 550 or so you're living dangerously...Getting ready to make a move to a 351 based engine combo and am just getting a feel for which way to go...
     
    Maxx Levell, Oct 5, 2011
    #1
  2. bmcdaniel

    bmcdaniel Senile Member

    Joined:
    Jul 2, 2002
    Messages:
    6,826
    Likes Received:
    682
    Trophy Points:
    318
    Location:
    York. PA
    Vehicle:
    '70 Maverick Grabber
    5.0 blocks, some may handle 550, some break at 300. Not uncommon to see 351W roller blocks live with 600 hp. In both cases rpm is what causes the caps to walk and webs to flex, leading to destruction.
     
    bmcdaniel, Oct 5, 2011
    #2
  3. Maxx Levell

    Maxx Levell Member

    Joined:
    Mar 10, 2002
    Messages:
    1,038
    Likes Received:
    107
    Trophy Points:
    222
    Garage:
    1
    Location:
    Henderson, KY
    Vehicle:
    1972 Mav 2 dr, 1971 Mav 2 dr...thanks Old Guy!
    Yeah...thanks. I just got word from the machine shop that my #2 main web is cracked around the bolt hole, so I'm just stepping up to a 351 based combo.
     
    Maxx Levell, Oct 5, 2011
    #3
  4. dkstuck

    dkstuck Member

    Joined:
    Sep 23, 2004
    Messages:
    3,249
    Likes Received:
    10
    Trophy Points:
    118
    Location:
    Latrobe Pa (Pgh)
    Vehicle:
    72 Maverick in drag
    Stroker,,,
     
    dkstuck, Oct 5, 2011
    #4
  5. Maxx Levell

    Maxx Levell Member

    Joined:
    Mar 10, 2002
    Messages:
    1,038
    Likes Received:
    107
    Trophy Points:
    222
    Garage:
    1
    Location:
    Henderson, KY
    Vehicle:
    1972 Mav 2 dr, 1971 Mav 2 dr...thanks Old Guy!
    Yes...probably 408. The trashed block was a 347.
     
    Maxx Levell, Oct 5, 2011
    #5
  6. Jsarnold

    Jsarnold Senior Member

    Joined:
    Oct 29, 2008
    Messages:
    2,842
    Likes Received:
    4
    Trophy Points:
    102
    Location:
    Raleigh, North Carolina
    Vehicle:
    '72 Sprint
    What HP was the 347 making?
     
    Jsarnold, Oct 5, 2011
    #6
  7. Maxx Levell

    Maxx Levell Member

    Joined:
    Mar 10, 2002
    Messages:
    1,038
    Likes Received:
    107
    Trophy Points:
    222
    Garage:
    1
    Location:
    Henderson, KY
    Vehicle:
    1972 Mav 2 dr, 1971 Mav 2 dr...thanks Old Guy!

    Honestly...I have no idea lol. I was running almost 102 mph in the 1/8th mile witn 3.89 gears and drag radials, so it was probably not doing too bad.
     
    Maxx Levell, Oct 5, 2011
    #7
  8. Jsarnold

    Jsarnold Senior Member

    Joined:
    Oct 29, 2008
    Messages:
    2,842
    Likes Received:
    4
    Trophy Points:
    102
    Location:
    Raleigh, North Carolina
    Vehicle:
    '72 Sprint
    Not bad at all!!
     
    Jsarnold, Oct 5, 2011
    #8

Share This Page