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Engine power question N/A motor

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Old 02-21-2017, 09:57 PM
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Originally Posted by Smitty
My question is how will this motor perform in a boat application ?
Give us more info.
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Old 02-21-2017, 10:00 PM
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Modified 502 intake and 540CI. Heads are from a 525.
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Old 02-21-2017, 10:00 PM
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Originally Posted by Smitty
Went to 5500 limiter. Hp was dead flat from 5100 to 5500. Ran out of airflow due to heads.

Getrdunn---in first post I stated peak was at 5100.
I overlooked that my bad. What is the build if you don't mind? Something not jiving.
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Old 02-21-2017, 10:01 PM
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Bang ! I sniffed out that hunk of schit intake ! LOL.

Originally Posted by SB
I'm going to venture a guess that this engine has a 502MPI intake or some other tuned port intake ?
Originally Posted by Smitty
Modified 502 intake and 540CI. Heads are from a 525.
Last edited by SB; 02-21-2017 at 10:04 PM.
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Old 02-21-2017, 10:03 PM
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What cam though? I would guess peak torque to be near 4,500 or so.
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Old 02-21-2017, 10:08 PM
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Next step up from a 525 cam. I was very surprised by the torque being higher than hp at max hp. My intake is not holding things back. My throttle bodies are 30% bigger than stock. It is the heads.
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Old 02-21-2017, 10:12 PM
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Originally Posted by Smitty
Next step up from a 525 cam. I was very surprised by the torque being higher than hp at max hp. My intake is not holding things back. My throttle bodies are 30% bigger than stock. It is the heads.
525 is 741 cam? Your peak torque at 5100 is what gets me. Throw a Vic jr and holley 850 and be done with it. Lol
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Old 02-21-2017, 10:12 PM
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No, under 5250rpm tq will be higher than hp even if you had better heads and intake.It's just math.

The issue you have, is that peak hp is at 5100rpm if you where looking for more hp and at a higher rpm.

What where your goals ?
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Old 02-21-2017, 10:14 PM
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Originally Posted by getrdunn
525 is 741 cam? Your peak torque at 5100 is what gets me. Throw a Vic jr and holley 850 and be done with it. Lol
He did not say his torque peak was at 5100rpm. He has only mentioned peak hp rpm. and what the torque was at that rpm.
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Old 02-21-2017, 10:16 PM
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Originally Posted by SB
He did not say his torque peak was at 5100rpm. He has only mentioned peak hp rpm. and what the torque was at that rpm.
Ya I went back and read it again. I had to read it three times to get it right. Rough last few days. What rpm was peak torque?
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