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CHEVYMILL
03-28-2011, 02:37 PM
wat do u guys think bout the 383 mpi in a 22 its 350 hp

gcarter
03-28-2011, 02:43 PM
Ho-Hum..........

You'll need at least 400 HP.

CHEVYMILL
03-28-2011, 02:48 PM
so wat do u suggest

zelatore
03-28-2011, 02:51 PM
I love the idea of a small block from a space standpoint since the classics don't exactly have the roomiest engine compatments.

But I think you'll find 350 hp is a bit light for most Donzi drivers.

400 hp is a good starting point. I would guess a small block making around 400 would perform about the same as the 385hp BB. Less weight, but less torque as well.

zelatore
03-28-2011, 02:59 PM
so wat do u suggest

I'm guessing you have a 22 with no power and a spare 383 MPI, right?

If that's the case and funds are tight, it'll work and get you out on the water. But be prepared to spend some time/money sorting it out. At a minimum expect to play with props.

What did the boat have originally? 454? Merc/B1 I assume?
(side note, if you don't have a drive now, you may be able to get away with running an Alpha behind the 383 which would certainly help the top end and be cheaper, but at the expense of resale and durability...ask MOP for more info on alphas on 22s)

If the budget is there, I'd suggest trying to sell/trade the 383 for a BB. If you're willing to go carb there are some decent motors for not much money available.

Otherwise, consider looking for a take-out stock 454 or 502 Mag. Those are pretty much drop-in engine packages that offer fair to good performance, good reliability, good upgrade options down the road, and are available at reasonable prices.

I suppose another option would be building the 383, but I'd tend to stay away from this. I bet you can get into a BB for the same or less money by the time you sell the 383, and you'll have a lot more room for growth as well as better potential re-sale down the road.

The only thing I see the small block having an advantage in is size/weight. I have to admit, the size thing alone does tempt me...

CHEVYMILL
03-28-2011, 03:10 PM
i just got the boat its a 1989 22 with a brovo 1 with imco 2in shorty lower and hydro steering no power at all was a 454 i think i kinda wanted fuel injected thats y i said 383 and the buget was trying to b around 8 and it will b in salt water

mrfixxall
03-28-2011, 03:41 PM
i just got the boat its a 1989 22 with a brovo 1 with imco 2in shorty lower and hydro steering no power at all was a 454 i think i kinda wanted fuel injected thats y i said 383 and the buget was trying to b around 8 and it will b in salt water

bolt this in and have a 80+ mph boat and go boating ;)

http://www.offshoreonly.com/classifieds/2001_500_efi_for_sale-o32243-en.html

p.s. i have the bell housing!

mrfixxall
03-28-2011, 03:45 PM
another

http://www.offshoreonly.com/classifieds/502_e_f_i_complete_marine_package-o38679-en.html

http://www.offshoreonly.com/classifieds/496ho_425hp_only_217_hours-o38264-en.html

http://www.offshoreonly.com/classifieds/2000_502_mag_mpi_efi_complete_drop_in_35_hrs_je_pi stons-o38059-en.html

go 90+ http://www.offshoreonly.com/classifieds/mercury_racing_575_sci-o37690-en.html

zelatore
03-28-2011, 03:48 PM
i just got the boat its a 1989 22 with a brovo 1 with imco 2in shorty lower and hydro steering no power at all was a 454 i think i kinda wanted fuel injected thats y i said 383 and the buget was trying to b around 8 and it will b in salt water


If you've got an $8K budget for repower, you should have no trouble finding a running, complete take-out 502 Mag to bolt in. That'll get you into the low (maybe mid with the shorty) 70s with plenty of relaiabilty and some cash to spare.

Or you can look at some of the aftermarket/custom stuff in that price range and get more power for the dollar. Just depends on you're particular wants/needs and comfort level with custom stuff.

Either way, on that budget I'd be shopping big block, not small block.

Oh, and since you're planning to run in salt water, look for closed cooling. You won't find it as often on a stock Merc 454/502, but you can always add aftermarket kits. George C on this site is a good source for info on putting together custom closed cooling systems.

zelatore
03-28-2011, 03:56 PM
Fixx is onto something here - any of those would work, though I'd be looking at the 502 or 500EFI over the 496.

In fact, I'm kinda wishing I had seen that 502 before I bought my procharger...Oh well, wrong time/wrong place.

(one note though - they did say 502 MPI but that looks like a carb motor)

gcarter
03-28-2011, 04:07 PM
A good thing about the 496 is they do have an HE.

BUIZILLA
03-28-2011, 04:34 PM
i just got the boat its a 1989 22 with a brovo 1 with imco 2in shorty lower and hydro steering no power at all was a 454 i think i kinda wanted fuel injected thats y i said 383 and the buget was trying to b around 8 and it will b in salt water
this is the teal green boat?

CHEVYMILL
03-28-2011, 04:54 PM
Yes it's the teal one and wat does a 502 run i need to fully dress it

gcarter
03-28-2011, 04:59 PM
Oh, and since you're planning to run in salt water, look for closed cooling. You won't find it as often on a stock Merc 454/502, but you can always add aftermarket kits. George C on this site is a good source for info on putting together custom closed cooling systems.

Here's some cooling info;

http://www.donzi.net/forums/showthread.php?t=50476&page=25

gcarter
03-28-2011, 05:03 PM
Here's some more and the following several pages;
http://www.donzi.net/forums/showthread.php?t=50476&page=51

mrfixxall
03-28-2011, 05:11 PM
Yes it's the teal one and wat does a 502 run i need to fully dress it


Hp Coupler

Bell housing

alternator and bracket

sea pump with fuel pump attached

cool fuel and high pressure pump

manifolds and risers

power steering pump and bracker

oil cooler and remote oil filter and hardware

front motor mounts

drive pulleys and belts

shift mechinsm

starter and cables

wire harness and mefi pcm

efi intake (upper and lower)

injectors and fuel rails

thermostat housing

misc nuts and bolts

maybe band aide and stitches




complete motor looks good about now dont it ;)

CHEVYMILL
03-28-2011, 05:31 PM
I ment how much price wise and that I needed it fully dressed

zelatore
03-28-2011, 05:56 PM
I ment how much price wise and that I needed it fully dressed

Take a look at the links Fixx already posted - there's a complete rebuilt 502 in there well under your budget, and an HP500 complete with headers as well.

I would figure you could find a stock take-out 502 Mag with resonable hours for under $5K. That would leave you $3K to do custom exhaust and other odds and ends you might need like a starter, alternator, etc.

I wouldn't even bother trying to source all the parts seperately to build up an automotive or bare-block 502. It sounds like you don't have a lot of expereince with marine motors, and you'll run yourself crazy trying to track down all the specific parts. If you do want to build a hot rod motor, try finding a high-hour or blown 454/502 Mag and start from there. Much easier than hunting all the parts seperately.

CHEVYMILL
03-28-2011, 06:12 PM
Ya. I don't have performance engine background Im really just looking for a reliable 70ish mph boat

mrfixxall
03-28-2011, 08:01 PM
Ya. I don't have performance engine background Im really just looking for a reliable 70ish mph boat

if thats the case than go with the hp 500 efi i posted...you will cruise @ 70 with throttle to spare...those are asking prices so im sure they will come down a bit..if your worries about getting ripped off then buy new,i can tell you that most guys on oso are stand up guys and their word still means something in this chit economy..

Fishermanjm
03-28-2011, 09:12 PM
Why not put the 383 in it an go boating an hav fun. Also hav
some $$$$ to put in the fuel tank.

zelatore
03-28-2011, 09:23 PM
Why not put the 383 in it an go boating an hav fun. Also hav
some $$$$ to put in the fuel tank.

Turns out he didn't actually have a 383, he was just guessing that it might be a good engine option to look for. Based on his question, I assumed (wrongly) he must have had one laying around.


If you want reliable 70 mph, that HP500 Fixx posted would certainly do it. Or a stock 502 Mag should also get you into the low 70s, especially with the shorty that's already on the boat. That's about the easiest way to go, and a resonable cost that comes in under your budget.

Fishermanjm
03-28-2011, 09:37 PM
So how do u guys think my 6.2 will push
my boat