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Need engine advice N A 598 cubic inch rebuild

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Old 12-31-2014, 09:32 AM
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Originally Posted by sutphen 30
on some of the dyno's you guys run on,it probably is,,for others w/ more accurate ones,not so.
REALY???
The dyno we use is not accurate? How did you come to that conclusion?
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Old 12-31-2014, 09:34 AM
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Old 12-31-2014, 09:39 AM
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Originally Posted by sutphen 30
on some of the dyno's you guys run on,it probably is,,for others w/ more accurate ones,not so.I just did a 600 w/ 357 afrs and got to 740hp,of course I kept the lift .675" so the valve and springs weren't getting changed every other year.and the engine idles at 800rpm.
Out of the box heads?
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Old 12-31-2014, 09:39 AM
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Let's keep my education on track.
Thanks
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Old 12-31-2014, 09:40 AM
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Originally Posted by sutphen 30
on some of the dyno's you guys run on,it probably is,,for others w/ more accurate ones,not so.I just did a 600 w/ 357 afrs and got to 740hp,of course I kept the lift .675" so the valve and springs weren't getting changed every other year.and the engine idles at 800rpm.
Many marine engine builders have proven 750hp 598ci recipes. And they are NOT 10.7:1 compression. Nor do they have 800 lift cams.

So what dyno do you use? We use a DTS . who's engines are you referring to that dyno happy ?
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Old 12-31-2014, 09:55 AM
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The AFR 357's are their CNC Head. So, yes probably ok out of the box.
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Old 12-31-2014, 10:33 AM
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Originally Posted by ICDEDPPL
REALY???
The dyno we use is not accurate? How did you come to that conclusion?
I work in an engine manufacturing facility with 8 certified engine dynos capable of handling a lot more horsepower than anybody on this board is making. With that being said, I can tell you from first hand real world experience that no two dynos are the same. Even from day to day things change.
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Old 12-31-2014, 10:46 AM
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Originally Posted by PurdueCAT
I work in an engine manufacturing facility with 8 certified engine dynos capable of handling a lot more horsepower than anybody on this board is making. With that being said, I can tell you from first hand real world experience that no two dynos are the same. Even from day to day things change.
I see your from Lafayette. Where do you boat around there ?
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Old 12-31-2014, 10:48 AM
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Originally Posted by Black Baja
Out of the box heads?
they were.
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Old 12-31-2014, 11:01 AM
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Originally Posted by vintage chromoly
.
Ya buddy, we in it now!
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