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  1. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    If you can get a new 377 marine motor for $3800. Buy hundreds of them. The going rate is $10,000 for a 6.2 SBC long block
  2. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    Look at the torque curve.
  3. Scott Danforth

    5.7L Cam Choice

    Skip the pre 1995 block. It will not be machined for the lifter spider for the roller lifters If you get the heads worked on, get them modified for thread in studs and cam lifts higher than 0.45". Then you can look at the XM264HR cam. With some additional work, you can look at the XM270HR
  4. Scott Danforth

    Mercruiser 496 MAG Refresh Thread

    go to NAPA, talk to the pot-bellied grey haired guy behind the counter. should be about $20 for a stamped steel PS pully. you can also straighten yours out with three blocks of wood and an arbor press
  5. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    To echo what @Scott06 mentioned on reversion. I have high speed GoPro videos of the exhaust pulses being sucked back into the exhaust elbows from over a foot past the outlet at certain RPMs
  6. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    Since the salt water motor most likely does not have a heat exhangers, assume you need to start with a new block and heads. Machine shop will advise What ratio DP? Assume 1.95:1 What props? What is the wet weight of the boat (actual scaled weight). Dry weight is 5200# for the Chap 256...
  7. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    the small block chevrolet has gone thru 6 minor generation changes in the 70+ years its been around. just the 350 (5.7) has been around for 5 of them. With power from 130hp to 600 hp naturally aspirated....they are not all the same. building a marine motor is also not the same as a truck or a...
  8. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    there are better marine ignitions than MSD
  9. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    Not Marine safe, not SAE J1171 compliant
  10. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    For decades, Volvo Penta used Holley vs Edelbrock/ Rochester
  11. Scott Danforth

    Car Hood Boats

    That AD truck hood would be worth a few hundred today
  12. Scott Danforth

    Old motors DEMAND to be retired when they are 65 years old..

    You started this thread
  13. Scott Danforth

    Old motors DEMAND to be retired when they are 65 years old..

    Yes
  14. Scott Danforth

    A nice tip but it’s not about stern drive storage in the up position

    Your pump will outlast the cylinders by decades
  15. Scott Danforth

    Planning out installing NMEA 2k

    Other than ability to control volume from the screens..... Not a single thing
  16. Scott Danforth

    Did Water Get Into My Gear OIL?

    Based on the rusty u-joints from the other threads, your input shaft seal is one of the suspects
  17. Scott Danforth

    repowering 2006 Chaparral volvo 5.7 with stroker.

    Reversion is a function of cam profile, compression ratio, ignition timing, and exhaust design. Check with MEFI Bob on the ECM if he can reprogram your ECM before you do any engine work I personally would ditch the EFI on the SBC if building a stroker If building an SBC stroker, I would go...
  18. Scott Danforth

    Can I Tell if Water is Getting into the U-Joint Bellows?

    You have to pull the drive once a year to inspect the alignment, U-joints and gimbal bearing along with the bellows Just do the full annual maintenance routine
  19. Scott Danforth

    restoring painted gel coat

    400 will work, however your looking at 2 years of sanding There is a reason it was painted. You will most likely find repairs below the paint The gel is only about 0.020-0.030" thick from the factory Most likely, you will have to sand the whole hull with 80 grit and re-spray, the gel...
  20. Scott Danforth

    Old motors DEMAND to be retired when they are 65 years old..

    Look up phoebus cartel. Planned obsolescence is in every single man-made object
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