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Great thread
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Damn, this is an old thread!!!
In 2015 I built a completely new set of engines for the boat. They have over 275hr on them and I freshened the top ends last year. 8.3:1 compression AFR 357CNC Custom Hyd. Roller Cam w/ Johnson Racing lifters 8:71, 3% overdriven 6psi boost. 964HP and 924t lbs. https://scontent-lga3-1.xx.fbcdn.net...WA&oe=62397B7D
Originally Posted by Panther
(Post 1293062)
Static compression 8.1:1
Boost pressure 5 psi Displacement 580" Heads Merlin 345 w/ 126 CC chambers. Cam: Lunati Hyd. Blower Cam (.571 - .580) the rest I'm not sure 8-71 Hampton Blower underdriven 5% 766 hp and 753 lbs. torque at 4500. I went with a conservative setup for longevity but I could always pump up the boost if I want more juice. :eek: |
Originally Posted by Panther
(Post 4822352)
Damn, this is an old thread!!!
In 2015 I built a completely new set of engines for the boat. They have over 275hr on them and I freshened the top ends last year. 8.3:1 compression AFR 357CNC Custom Hyd. Roller Cam w/ Johnson Racing lifters 8:71, 3% overdriven 6psi boost. 964HP and 924t lbs. https://scontent-lga3-1.xx.fbcdn.net...WA&oe=62397B7D |
Originally Posted by Unlimited jd
(Post 4822358)
still 580”?
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I dont remember half the stuff in this thread :)
Ironically i just stumbled across this video last week Crazy I had hair and no brains back then! sry i used my phone on the plasma on vhs c i think its the combo above that was in my hustler with arnesons. |
i think the rod flew out the side... thats why it ended so quick
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Bassett Headers? Sweet!
How much boost? :( |
Originally Posted by KNOT-RIGHT
(Post 4824580)
i think the rod flew out the side... thats why it ended so quick
Anybody know the story. It did end rather abruptly. Went back and listened again. Even with my deaf azz ears it sure sounds like something let lose. Sounded like top end though. |
525SC was a 7.5 compression 5.5psi engine running very rich I thought ??
My 600SC ran like a champ for 300hrs, I never saw over 5psi so maybe Mercury knows something . |
Originally Posted by ICDEDPPL
(Post 4824638)
525SC was a 7.5 compression 5.5psi engine running very rich I thought ??
My 600SC ran like a champ for 300hrs, I never saw over 5psi so maybe Mercury knows something . |
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