350 mag. ?

[smokediver]

I was wondering if anyone has taken a 350 mag mpi and put a 383 rotating assembly inside ? would the fuel injection support the extra cubes ?

[ky-donzi]

Smokediver

if you mean can the stock system provide enough fuel. I believe so, because I have procharged a stock 350 mag mpi. THe stock system provides enough pressure and volume with under boost


But If you mean function correctly, with no modifications.... I believe that the ecm will have to be recalibrated to compensate for the extra cubic inches, or plug-in a ecm from a 383 engine

[harbormaster]

The electronic control module (ecm) is the key. The mpi system is virtually the same between the 5.0, 5.7. 6.2. and 383.


reprogramming the ECM is the problem. Mercruiser has the locked down.

[BigGrizzly]

At this time the Feds are talking to Merc about that. When and it is happening they will have to conform to the same things the Auto guys do. Right now the EPA has bigger fish to fry, but it won't be long. Just so you know there are so many ways around the ECM with new programmable stuff coming every day.

[mrfixxall]

all you need to get is a 383 ecm..But the question i have is the mpi a late model or a early model(plastic upper intake plenum or alunimum)

[tice652]

Which is better for this Aluminum or plastic? How do you get your hands on a 383 ecm?
Thanks
Dan

[gold-n-rod]

Merc offers a 383 drop in motor. My boat doctor thought it'd be a great upgrade to my 305, but Merc recommends a Bravo behind it. With an Alpha, I don't think it's in the cards for me.

Poodle ought to be able to source out a 383 PCM right from Merc.

[need for speed]

:wink:leave it stock !!!:smash::smash:

[fasttrucker]

:wink:leave it stock !!!:smash::smash:
IfYour Handle here on Donzi Net is......need for speed how could you say "leave it stock"........you should change your handle to "like to go slow":propeller:............well? just sayin cause Iam thinking about doing this same thing to my 22zx with its 350 mag/300hp its way too slow for me!

[fasttrucker]

Merc offers a 383 drop in motor. My boat doctor thought it'd be a great upgrade to my 305, but Merc recommends a Bravo behind it. With an Alpha, I don't think it's in the cards for me.
Poodle ought to be able to source out a 383 PCM right from Merc.
Your alphia should handle it,depends on if you like to start-up fast or get a lot of air!

[kramsay1234]

I ran 400hp through my Alpha for 10 years and never had a problem. Just drove the boat out of the water. Normal running no problem.

[smokediver]

:wink:leave it stock !!!:smash::smash:
Yeah , I think you are right Charles ... It has been sooo dependable and great fuel economy .. I gotta quit thinking !

[need for speed]

Ya really shouldn't pick on folks who are stock..
AND faster than you :D :D :D


Thank you !~:wink:
Smokediver has had the drive man on speed dial.. he has been down the mod road a few times! His new boat runs like a top and always gets him home!

[The Hedgehog]

Yeah , I think you are right Charles ... It has been sooo dependable and great fuel economy .. I gotta quit thinking !

Awe come on.....join the madness!:propeller:

[fasttrucker]

Iam down with the HEDGEHOG!......Going over 70 mph is cool:cool: This reply to Donzi performance talk section of the donzi net web site has been about performance which is also cool:cool:..........No second thought going over 70mph is more then cool..........its awesome!:eek:

[mrfixxall]

Smoke here a good deal for you ,looks like a complete package less ptops.

http://cgi.ebay.com/ebaymotors/2003-Mercruiser-6-2L-377-cid-Bravo-3-Complete-Lift-Out_W0QQcmdZViewItemQQcategoryZ50442QQihZ021QQitem Z310084917015QQrdZ1QQsspagenameZWDVW