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Procharged 454MPI estamated H.P question

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Old 04-13-2008, 09:21 PM
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Question Procharged 454MPI estamated H.P question

Ok I have a 1999 454 mpi 310 H.P engine Dana Headers,Jacobs Ignition,36/lb/hr fuel injectors,2 bar map sensor, reprogramed ecu,m1 sc procharger jacobs ignition system. How much Horses am I running ?? Let me know what you guys think thANKS
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Old 04-13-2008, 09:41 PM
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Originally Posted by snake plissken View Post
Ok I have a 1999 454 mpi 310 H.P engine Dana Headers,Jacobs Ignition,36/lb/hr fuel injectors,2 bar map sensor, reprogramed ecu,m1 sc procharger jacobs ignition system. How much Horses am I running ?? Let me know what you guys think thANKS
How many lbs of boost?
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Old 04-13-2008, 09:45 PM
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5lbs
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Old 04-13-2008, 10:01 PM
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510 HP approximate
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Old 04-13-2008, 11:48 PM
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I would say 500-520 hp.
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Old 04-14-2008, 12:06 AM
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Agreed, 500-520.
I had a 454 mag (385 hp stock) and with a Vortec @ 6lbs I saw roughly 580-600.
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Old 04-14-2008, 12:23 AM
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Wouldn't a better question be - "For how long?"
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Old 04-14-2008, 08:53 AM
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I had a 22ZX we supercharged it with 50 hours 7.4 310HP. I sold the boat with 285hours and she had over 400 hours on her when the motor let go and that was because the person that bought it didn't pay attention to the oil (she developed an oil leak) in the oil cooler and he ran the engine dry. OUCH!
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Old 04-14-2008, 09:17 AM
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Ditto, mine ran strong for four years after supercharging (approx 400 hrs), then I had oil leaking through the intercooler. I did a rebuild on the motor and the only thing wrong was the valve seats got hammered and were blowing the oil back through the intercooler. The bottom end tested perfect and the only thing I had to do was a valve job and clean out the intercooler.
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