New Engines: 557 or 572
#81
Registered
Thread Starter
Re: New Engines: 557 or 572
These motors will definately have whipples on them. I am just not sure that I would want to turn more than 6200-6500 rpm's. So I'm wondering if I should go ahead and build the 4 1/2 stroke and take the extra torque. I ASSUME, I know I shouldn't, that if I go with the 4 3/8 stroke I will give up a little torque ( at the same rpm) but be able to safely turn more rpm's if needed. Assuming this is true, any idea how much the difference would be in torque. and would it even br noticeable in the boat.
Thanks
Michael
Thanks
Michael
#83
Geronimo36
Gold Member
Re: New Engines: 557 or 572
Originally Posted by mrhorsepower1
That depends on how long of a rod length you choose.
We could have cheated and got a flat top with a thicker head gasket or had a dish milled into the piston but I wasn't a big fan of either choice and told my "old" builder not to do it....
#84
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Re: New Engines: 557 or 572
Originally Posted by Comanche3Six
What length do you recommend?
#85
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Re: New Engines: 557 or 572
Originally Posted by mrhorsepower1
I like the 6.635 rod. It allows the ring land stack and crown thickness of the piston to be engineered better.
#88
Registered
Thread Starter
Re: New Engines: 557 or 572
Originally Posted by JCPERF
588cu in
Also are you guys running the same 6.635 rod with both stroke combo's.