1999 Mercruiser 5.7l with Alpha 1 outdrive

[wakerider09]

Is it possible to have an EFI merc 5.7l engine on an Alpha 1 outdrive? MPI are only compatible with Bravo, correct?

 

[Bob_VT]

Re: 1999 Mercruiser 5.7l with Alpha 1 outdrive

Yes, it is possible and done all the time.

 

[Chris1956]

Re: 1999 Mercruiser 5.7l with Alpha 1 outdrive

So the outdrive doesn't know what kind of fuel injection is on the motor? How ignorant of it...

Seriously, Alpha drives were mated to bg block motors. It was not a great marriage, but it worked.

 

[Bondo]

Re: 1999 Mercruiser 5.7l with Alpha 1 outdrive

Is it possible to have an EFI merc 5.7l engine on an Alpha 1 outdrive? MPI are only compatible with Bravo, correct?

Ayuh,... Welcome Aboard,.... Both the Efi, 'n Mpi are used with Alpha drives,...

 

[tpenfield]

Re: 1999 Mercruiser 5.7l with Alpha 1 outdrive

Yea, the ignorant Alphas go to 300 hp, so they can accommodate the the 5.7L engines. The outdrives don't care so much about EFI, MPI, TBI, or that sort of stuff.

 

[dancewithme951]

Re: 1999 Mercruiser 5.7l with Alpha 1 outdrive

But I've also read other posts that claim exhaust flow is restricted when the 4" diameter dual exhausts on the V8s are downsized to a single 3" outlet, causing decrease in RPMs at WOT.