Performance Suggestions Wanted!

[MasterMKey]

Hey guys,
We just recently bought a 22 classic it's my fist donzi and I dont know much about them. We are looking to redo alot of the interior and try to get as much speed out of her as we can. So i would love any suggestions anyone has. Not sure what year it is but I think it is probably a 95 or later due to the CD deck holder.

We bought it from a guy who took out the inboard and put a brace for a 250 hp Outboard Mercury. When we bought it we put on one of our old 300's off of our Venture. I know it does'nt have the correct prop because we hav'nt changed that yet so any suggestions on a good prop would be appreciated. We are getting a little over 60 mph with the current set up but we want alot more :)! Also if there is anyone that knows much about outboards any tips would be great!

For the interior, we are looking for a new carpet, gauges, steering wheel, throttle, and Donzi decals for the side.

Thanks. :cool:

[chappy]

Cool boat. Would love to see pics. Wait until you hear the Harbormaster's story of his 22 with(out) an O/B.:pimp:

First question, what prop is on there now, and what's the engine turning at wot?

Welcome to the board and good luck.

[BUIZILLA]

did you add new transom knee's ??

[MasterMKey]

The prop is a 19 inch mercury mirage, the RPMs guage is broken so as soon as the engine hits idle it reads max @ 6000 which is incorrect. Did not change the Transom knee, not sure exactly what that is. The engine is a '99 Mercury 300 XS.

Here are two more larger pics so that you can see where she is sitting in the water. The one from the side is the old 250, I will post some later tonight of the 300 on her.

Thanks.

http://i67.photobucket.com/albums/h314/mastrkey89/Randy__Alistar_2008.jpg

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0085.jpg

[BUIZILLA]

cool...........

i'm thinking at least a 24" prop........

[SilverBack]

I did not even know that you could do that! Sweet! Welcome to the board!! I guess that you have a good bit of storage space. Does the boat have a hydraulic jack plate? Does it porpoise much?

[MasterMKey]

Ya it can porpoise alot when you trim her out right, quite fun, but in fairly calm water tabs fully trimmed out and engine trimmed up for top speed she rides great. We did have to put a 150 lb. fatsack in the back where the engine was b/c at top speed she felt a little unstable, but with the weight she's solid as a rock.

I have been looking at the mercury racing Chopper II and Lightining ET, heres the link: http://www.mercuryracing.com/propellers/chopperii.php

[SilverBack]

Ya it can porpoise alot when you trim her out right, quite fun, but in fairly calm water tabs fully trimmed out and engine trimmed up for top speed she rides great. We did have to put a 150 lb. fatsack in the back where the engine was b/c at top speed she felt a little unstable, but with the weight she's solid as a rock.

I have been looking at the mercury racing Chopper II and Lightining ET, heres the link: http://www.mercuryracing.com/propellers/chopperii.php

That is a great idea on the water bag!! HMMMM ...I wonder if that would help me????? I guess you could always throw another XS 300 on there to get some more weight and speed. Out boards are way easier to deal with!!

Since I did not know that you could put an outboard on a 22C...has anyone put 2 of them on one?? How fast would that be????

[MasterMKey]

That is a great idea on the water bag!! HMMMM ...I wonder if that would help me????? I guess you could always throw another XS 300 on there to get some more weight and speed. Out boards are way easier to deal with!!

Since I did not know that you could put an outboard on a 22C...has anyone put 2 of them on one?? How fast would that be????

We have a second one which we took off of our Venture when we replaced her engines, it's just sitting around right now, we could probably redo the bracket and stick it on. Only problem would be getting my dad to go along with it, he's the brains behind it all and would probably call it overkill. But I would imagine with a second one you would atleast be knocking 75+ b/c of how light they are. When we had the 250 hp efi we were only getting about 50 mph, when we threw our 300 xs we automatically got an extra 10 mph and that's running the mirage prop which I think is way off from what it should be.

[SilverBack]

We have a second one which we took off of our Venture when we replaced her engines, it's just sitting around right now, we could probably redo the bracket and stick it on. Only problem would be getting my dad to go along with it, he's the brains behind it all and would probably call it overkill. But I would imagine with a second one you would atleast be knocking 75+ b/c of how light they are. When we had the 250 hp efi we were only getting about 50 mph, when we threw our 300 xs we automatically got an extra 10 mph and that's running the mirage prop which I think is way off from what it should be.


Oh..I forgot to tell you..never listen to me...I come up with some crazy stuff and the other guys tell me the right thing to do...It is something that I might try but I would hate to mess someone else up!!

[BUIZILLA]

any pic's of the old engine compartment? :wink:

[MasterMKey]

any pic's of the old engine compartment? :wink:

No, we never saw the inboard she had on her, the guy we bought it from had already ripped it out and put the 250 on it. And right now it is just a large storage space with a fatsack in it :shades:.

[BUIZILLA]

I'd like to see how they fastened the bracket and the stringer setup

thanx :shades:

[MasterMKey]

Sure, I'll have my dad get some pictures of it next time he is at the boat, we live in the Bahamas but im currently going to the university of alabama, so I can't take it myself :garfield:.

We had out local Mercury folks check its strength when we put the new engine on, they said it was more than good. It is about 8 large bolts running in a circular pattern around where the bracket is and they go right through the fiberglass of the hull to the back of the engine compartment.

[BUIZILLA]

somewhere I already have spy pic's of this boat... :wink:

lemme see here...

[Last Real Texan]

Sweeeeeet

[DonziJon]

With the right prop that thing will FLY. :yes: Does the motor exhaust through the hub or somewhere else? What does the motor weigh? Not that familiar with outboards any more. John

[MasterMKey]

From looking at the new 300 optimax I would say it wieghs any where between 500 - 550 lbs.

[BigGrizzly]

Interesting concept. The stock inboards ranged fro 315 to 415 in various configurations with the small hp versions run about 63 to 65 with higher HP running in mid 70 MPH range I too am going for the 24/25 pitch range. A guestiment would be a tad over 65MPH

[BUIZILLA]

apparently there are two of these in the Bahamas...

[MasterMKey]

Haha Ya! I know the guy that owns that one, only differnece is his is one of the only outboard models acutally built by Donzi an '89 I believe he said.

[MasterMKey]

Interesting concept. The stock inboards ranged fro 315 to 415 in various configurations with the small hp versions run about 63 to 65 with higher HP running in mid 70 MPH range I too am going for the 24/25 pitch range. A guestiment would be a tad over 65MPH

Concerning pitch of the prop. If we went with a larger prop like that would'nt that decrease the RPM's of the engine? The engine I beleive is supposed to run up 6100 - 6200 rpm's so Im just curious on the thought behind a larger prop.

[BigGrizzly]

It all really depends on what real rpms you are running and the type of prop. Not all 24 run the same.

[MasterMKey]

So you think with the right prop most we could get is 65? We really wanted to atleast touch 70 somehow, guess we will have to put the other 300 on her!

[BigGrizzly]

Maybe 65, but I would seriously be surprised if it did 69 or 70. I was wrong once when I though I would be lucky to get 80 out of mine. I surpassed that 7 years ago.

[BUIZILLA]

6100 x 1.75 x 24 = what?

[MOP]

I liky the one with the well, the bracket will be a bit faster. With twins I bet the boat would be a Hoot! Counter rotating engines takes a lot of squirreliness out, the added weight will help to get the nose up 22's don't make good speed riding to flat.

Phil

[MasterMKey]

Well, thanks everyone for all of the input! We will tweak the one engine to get the most out of it that we can and if in the end it boils down to two engines than so be it! We want to race it in the local island's boat race next summer so we will get it going fast one way or the other! :)

[BigGrizzly]

I don't know the gear ratio that your boat has?

[MasterMKey]

Not sure what the gear ratio is, I know some of you wanted to see some pics of the brackets so here a few more photos. :shades:

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0166.jpg

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0167.jpg

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0168.jpg

[DonziJon]

6100 x 1.75 x 24 = what?

= 256200. So how fast are we goin? John

[MasterMKey]

Mmmmm That sounds good to me!! :)

[SilverBack]

Not sure what the gear ratio is, I know some of you wanted to see some pics of the brackets so here a few more photos. :shades:

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0166.jpg

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0167.jpg

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0168.jpg


I don't see the pictures.

[MasterMKey]

Hmm that's odd I can see them, I am hosting them from another website might of temporarily went down, anyone else having the same problem?

[SilverBack]

I can see the ones that you posted yesterday but none from today. Anyway..LRT claims that he can only see 38 pages of my 25 zx thread and there are over 54!! Who knows???

[MasterMKey]

Well for you silverback heres the direct links. :wink:

http://i67.photobucket.com/albums/h314/mastrkey89/PICT0168.jpg
http://i67.photobucket.com/albums/h314/mastrkey89/PICT0167.jpg
http://i67.photobucket.com/albums/h314/mastrkey89/PICT0166.jpg

[SilverBack]

Thanks...they are all there now!!!

[HIGH LIFE]

MasterMKey, are those concrete blocks in the bilge????? You would be better off using sand bags. Also clean up rust spots, I use bleach in a spray bottle and a small brush, wet surface before using bleach, does a good job. HIGH LIFE

[Air 22]

Concrete Blocks??Holy cow batman:eek: are they bolted down? :nilly: Is that engine bracket causing any stress cracks on the transom? Highlife is righ to clean that area up..:wink:

Boat looks kool from the outside...:yes::wink:

[breeze400]

I HOPE THETRE BOLTED DOWN BATMAN!!!:eek::eek::eek: Or some one might get clobered!! :bonk::bonk::bonk:

Sam

[Last Real Texan]

Am I the only one who thinks the motor looks too low?

Tex

[MasterMKey]

Ya, the cement blocks were there before we had the fatsac, but they are gone now. And we got alot of work to do to the boat remember we just bought it. We are going to get all of that cleaned up.

[DonziJon]

I can't see where adding weight to a boat makes it faster.:confused: John

[SilverBack]

If the center of gravity is not exactly right then adding weight to the back could make the boat more stable by moving the center of gravity further to the rear. By making the boat more stable you may be able to drive it faster.

[Last Real Texan]

If the center of gravity is not exactly right then adding weight to the back could make the boat more stable by moving the center of gravity further to the rear. By making the boat more stable you may be able to drive it faster.
:hijack:I see you are back from your day at the lake.....so how was it?
Tex

[MasterMKey]

Ya, we got the wieght there now so that it will be a safe driving boat. When I go to race it I may take some of the water out of the sac but I know with no wieght it felt very unstable wide open. :nilly:

[SilverBack]

Can you trim the bow up higher with the weight in the back?

[BigGrizzly]

Tex, the looks of the motor does look low but I think it is pretty much where it should be. That boat does not have a pad and is a saucer bottom with a deep V, so higher up could be an issue. At this point it is plug and play

[MasterMKey]

Ya, Silverback with the wieght the bow can trim way up!

[Greg Guimond]

apparently there are two of these in the Bahamas...


Haha Ya! I know the guy that owns that one, only differnece is his is one of the only outboard 22 models acutally built by Donzi an '89 I believe he said.

Sorry MasterMKey ........