454 mpi more hp?
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454 mpi more hp?
I have stock pair of 454mpi non mag motors and wondering what the best way to get a little more power out of them at least to 400hp or so. they have 400 hrs and run perfect.
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A Whipple or Procharger is the best bang for the buck. Otherwise, you will need at a minimun, head work with all the hardware (springs, retainers, studs,rockers etc.), exhaust, cam,etc.
However, I would still recommend some head work with the addition of a SC. You should freshen up the heads anyway since it has 400 hrs. If you do a SC, you should put in a goood set of valves, new springs, and Cometic head gaskets.
Eddie
However, I would still recommend some head work with the addition of a SC. You should freshen up the heads anyway since it has 400 hrs. If you do a SC, you should put in a goood set of valves, new springs, and Cometic head gaskets.
Eddie
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If it has 400 hours on them leave them alone. If you go adding boost your engines with 400 hours will turn into ticking time bombs. I would decide now what you really wan't in the long run and start getting parts together and just run what you have.
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same issue..
sorry to bring this one year old thread to life, but i have the same "problem".
I have a 2000 454 mpi with about 350 hours. i just bought the boat and i am not sure if the former owners have been doing their mainainence and since it is soon 10 years old i was thinking of taking the engine out for this winter just to see if there is some parts that needs to be changed.
while doing this i am offcourse also thinking to cranking the power up a bit. nothing to serious, i dont whant it suprtcharged but i might as well get something done when the engine is out.
does anyone have any suggestions?
oh, and buy the way, i live in Sweden and the only used 502 i can find on the market is 11,200$ so thats out of the question, but lets set the budget for about 5000$
//Emil
I have a 2000 454 mpi with about 350 hours. i just bought the boat and i am not sure if the former owners have been doing their mainainence and since it is soon 10 years old i was thinking of taking the engine out for this winter just to see if there is some parts that needs to be changed.
while doing this i am offcourse also thinking to cranking the power up a bit. nothing to serious, i dont whant it suprtcharged but i might as well get something done when the engine is out.
does anyone have any suggestions?
oh, and buy the way, i live in Sweden and the only used 502 i can find on the market is 11,200$ so thats out of the question, but lets set the budget for about 5000$
//Emil
#7
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sorry to bring this one year old thread to life, but i have the same "problem".
I have a 2000 454 mpi with about 350 hours. i just bought the boat and i am not sure if the former owners have been doing their mainainence and since it is soon 10 years old i was thinking of taking the engine out for this winter just to see if there is some parts that needs to be changed.
while doing this i am offcourse also thinking to cranking the power up a bit. nothing to serious, i dont whant it suprtcharged but i might as well get something done when the engine is out.
does anyone have any suggestions?
oh, and buy the way, i live in Sweden and the only used 502 i can find on the market is 11,200$ so thats out of the question, but lets set the budget for about 5000$
//Emil
I have a 2000 454 mpi with about 350 hours. i just bought the boat and i am not sure if the former owners have been doing their mainainence and since it is soon 10 years old i was thinking of taking the engine out for this winter just to see if there is some parts that needs to be changed.
while doing this i am offcourse also thinking to cranking the power up a bit. nothing to serious, i dont whant it suprtcharged but i might as well get something done when the engine is out.
does anyone have any suggestions?
oh, and buy the way, i live in Sweden and the only used 502 i can find on the market is 11,200$ so thats out of the question, but lets set the budget for about 5000$
//Emil
If you're set on spending some $$, then get your prop lab finished and add a performance exhaust system. Those two things will run you about $3000 USD, or more. You will need the exhaust anyway if you do any real performance upgrades in the future.