Another 540 Cam Thread?
04-04-2004, 07:37 PM
#1
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Charter MemberThread Starter
Another 540 Cam Thread?
I would like to some opinions on my engine builder's choice of cam for a 540 Marine engine.
It is a 9:1, maybe 9.2:1 compression ratio.
Using AFR 315cc CNC Ported heads. Also has Dart Big M block, Callies crank, Lunati rods, J&E pistons, Crower rockers.
The cam has these specs:
112 LSA
236/240 @ .050
.630/.635 Valve Lift
It is a hydraulic roller Comp Cam. Not sure if it's off the shelf or custom grind.
Want to use a 1050 Carb with single plane intake and Stainless Marine Long Wet Risers exhaust.
Any feed back is appreciated.
Thanks, Russ Withiam
It is a 9:1, maybe 9.2:1 compression ratio.
Using AFR 315cc CNC Ported heads. Also has Dart Big M block, Callies crank, Lunati rods, J&E pistons, Crower rockers.
The cam has these specs:
112 LSA
236/240 @ .050
.630/.635 Valve Lift
It is a hydraulic roller Comp Cam. Not sure if it's off the shelf or custom grind.
Want to use a 1050 Carb with single plane intake and Stainless Marine Long Wet Risers exhaust.
Any feed back is appreciated.
Thanks, Russ Withiam
Last edited by RLW; 04-04-2004 at 07:43 PM.
04-05-2004, 09:45 AM
#3
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Location: Park Ridge, IL/ Sheridan Beach, IN
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I built a pair of 540's this past winter that are almost identical to what you're putting together - same block, same heads, same compression ratio, etc. The only difference is that I went with 850cfm marine Holleys on Victor Jr single planes. I used the Crane 741 cam and made ~690hp @5700rpm and ~670ft lbs @4600rpm. You'll probably gain 20-30 hp/tq over that with the Dominator's.
Last edited by Monty; 04-05-2004 at 10:00 AM.
04-05-2004, 05:46 PM
#6
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Charter MemberThread Starter
Thanks for the feedback.
Already have the 1050 and the Stainless Marine Exhaust. Dry pipes would be to loud where I boat. Looking at a Victor intake based on what somebody had mentioned, in regards to the ports matching up nicely.
Dyno, interesting that you mentioned a hydraulic flat tappet. I really wanted a full roller engine.
I would like to hear from the Toilet Doctor.
McCollinsTn????????
Already have the 1050 and the Stainless Marine Exhaust. Dry pipes would be to loud where I boat. Looking at a Victor intake based on what somebody had mentioned, in regards to the ports matching up nicely.
Dyno, interesting that you mentioned a hydraulic flat tappet. I really wanted a full roller engine.
I would like to hear from the Toilet Doctor.
McCollinsTn????????
04-05-2004, 07:45 PM
#7
Charter Member #655
Charter Member
i went the full roller route once before on a 502 I had and didn't think it was worth the extra cost and the maintenance (lash) I really dont try to squeese every hp out of my stuff, whats a good choice for the flat tappet route? there has got to be one....
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If your boat has a sail do you ride a horse to the ramp?
If your boat has a sail do you ride a horse to the ramp?
04-06-2004, 08:53 AM
#8
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Hydraulic rollers require no more maintenance than a flat tappet hydraulic. They also out perform a flat tappet in all aspects.
Are you reffering to a solid roller?
Confused
Dave
Are you reffering to a solid roller?
Confused
Dave
04-06-2004, 09:12 AM
#9
Charter Member #655
Charter Member
Yes I had full roller....lots of cost in a hydraulic roller set and then do it twice with twins
__________________
If your boat has a sail do you ride a horse to the ramp?
If your boat has a sail do you ride a horse to the ramp?
