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Originally Posted by PatriYacht
(Post 3271404)
The piston to valve clearence with those pistons is quite large. Easily enough for any cam you would want in a marine engine. To answer the original question, I bet the hp peak would be 4600 using the parts specified. And I would guess that it makes about 450 hp but about 700 ft.lbs. of torque.
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im not going to deck the heads now that i know what my comp ratio is...........
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Originally Posted by 302Sport
(Post 3271408)
going to talk to with bob on monday when he gets back. needed new intakes anyways, but most likely going to have him grind me a diff. cam than what i have. also heads are at machine shop for valve job w/ new valves and spring.
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yeah thats what i was thinking. bob and my engine builder, who is also named bob are both at the show this weekend
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The best money I ever spent on building engines was a dyno run. For 600 to 800 bucks, you'll know for sure what you got and where you need to go.
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well theyre already apart and when they go back back together they are what they are. im not the type of person to run it on the dyno, then swap a cam just to see what happens.
i would hope the guys that build engines for a living could be somewhere in the ballpark when they tell us what we need. |
Originally Posted by Boat1
(Post 3270095)
IMHO that cam is a poor choice for a 540 ci N/A engine. The bigger cubic inch engines like a wider LSA like 112 - 114 and I would increase the duration and lift. Those heads will support .650 lift with mild work, it would be nice to add compression but not a requirement. I also would spread the intake and exhaust duration, adding 6 -8 degrees of exhaust duration to the intake duration. You should contact Bob Madiera of Marine Kinetics 585-654-8583, you won't be dissapointed.
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Good thing about dynoing, when engines come back, the carbs are jetted perfectly. Timing is set and set to where engnes make most power(without detonating), and you dont have to worry about any leaks AFTER the engines are installed! You dont have to worry about anything, just install engines and ready to go. ALL tuning is done. Well worth the money IMO..........You will know exactly the HP and the torque. Will also help Brett at Bblades set your props up..do it!!!!
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Also I do all the assembly so he doesn't want to dyno them.....only thing i use him for is parts, machine work, and advice.
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bob madera
and RMbuilder for cam either or |
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