How Much Boost????
02-21-2022 | 01:37 PM
#52
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
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.
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.
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.
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.
02-21-2022 | 02:06 PM
#53
Registered
Joined: Jul 2009
Posts: 8,527
Likes: 706
From: Taunton Ma
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.
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.
03-10-2022 | 07:57 AM
#55
Thread Starter
Registered
Joined: Dec 2002
Posts: 3,363
Likes: 165
From: Providence,RI
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.
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.
03-10-2022 | 01:18 PM
#58
Registered
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
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.
Last edited by getrdunn; 03-10-2022 at 01:21 PM.
03-10-2022 | 02:48 PM
#60
Registered
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
We had the early on 1992 525 sc’s. Just a little over 5 pds boost with no innercoolers. They were pig rich but ran the dog chit out of them without any failures. I should’ve spent some time getting jetting right but didn’t then.
