2015 Mercruiser 377 MPI Tuning? Changing Rocker arms?
#1
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2015 Mercruiser 377 MPI Tuning? Changing Rocker arms?
Hello,
I have two Mercruiser 377 Mag Mpi in my boat with imco Powerflow exhaust from 2015
Gived it opinium with little tuning this engine?
Can i change the rocker arms, from steel arm 1,5 to full rocker with 1,6 ratio? Will this work?
Or must i programming than my pcm?
Thanks
Patrick
I have two Mercruiser 377 Mag Mpi in my boat with imco Powerflow exhaust from 2015
Gived it opinium with little tuning this engine?
Can i change the rocker arms, from steel arm 1,5 to full rocker with 1,6 ratio? Will this work?
Or must i programming than my pcm?
Thanks
Patrick
#2
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It is essentially the same as going to slightly larger cam.
I don't think you will see any significant gains in power. Maybe 10-15 hp at most which equals about 1 mph.
Most likely you would need to have the ECM tuned. If you installed a wide band O2 sensor and guage, you could check the readings.
Do you have a PCM555 or MEFI ???
I don't think you will see any significant gains in power. Maybe 10-15 hp at most which equals about 1 mph.
Most likely you would need to have the ECM tuned. If you installed a wide band O2 sensor and guage, you could check the readings.
Do you have a PCM555 or MEFI ???
#6
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Correct not worth doing anything to these stock 6.2 MPI and down MERC engines. one is longevity can be comprised and really sometimes no performance are gained either after all that time, effort and money.
I would play with props and take weight out of the boat if all possible. A very Clean bottom and clean water to the prop(s) plus a very straight skeg also helps as well.
I would play with props and take weight out of the boat if all possible. A very Clean bottom and clean water to the prop(s) plus a very straight skeg also helps as well.