HawkX66
Well-Known Member
- Jul 27, 2020
- 1,344
- Boat Info
- "Tread Knot"
1997 Sea Ray Sundancer 290DA
2020 F350 6.7L
- Engines
- 454 L29 Carb w/ Bravo III
I've been busy and haven't put a lot of time into the boat. Long story short, someone who knows better than me corrected me on my cam install. Thankfully before I reinstalled it. It turns out that I had to install it with 6 degrees advance, not dot to dot or even at A2 like I had above. If I had installed it as it was I would have lost a little power, but it would have run fine. The good thing in this is that I learned a ton that I thought I already knew about cams.
I was able to button up my motor and start dressing it with the accessories over the weekend. Hopefully I'll be able to drop it back in the boat this coming weekend if the weather is decent.
I'm looking forward to relaunching it with my new toy also...
Duration @ .050" 226°/226°
Valve lift .284"/.2845"
Max Lift. .284"x1.7=.4828"
IVO 5° (btdc)
EVO 56° (bbdc)
IVC 41° (abdc)
EVC 10° (btdc)
Int duration=IVO+180°+IVC
5°+180°+41°=226°
Exh duration=EVO+180°+EVC
56°+180°-10°=226°
LCL
Int (61° + 156.5°)/2=217.5°/2=108.75°
Exh (169°+74°)/2=243°/2=121.5°
LSA
(108.75°+121.5°)/2=230.25/2=115.125
Overlap=IVO+EVC
-5°+10°=5°
I was able to button up my motor and start dressing it with the accessories over the weekend. Hopefully I'll be able to drop it back in the boat this coming weekend if the weather is decent.
I'm looking forward to relaunching it with my new toy also...
Duration @ .050" 226°/226°
Valve lift .284"/.2845"
Max Lift. .284"x1.7=.4828"
IVO 5° (btdc)
EVO 56° (bbdc)
IVC 41° (abdc)
EVC 10° (btdc)
Int duration=IVO+180°+IVC
5°+180°+41°=226°
Exh duration=EVO+180°+EVC
56°+180°-10°=226°
LCL
Int (61° + 156.5°)/2=217.5°/2=108.75°
Exh (169°+74°)/2=243°/2=121.5°
LSA
(108.75°+121.5°)/2=230.25/2=115.125
Overlap=IVO+EVC
-5°+10°=5°
Last edited: