Donzi 22zx questions
 

I tried searching for hours now, and can not find the answers.

2000 Donzi 22zx, steped hull, and at least a 454MPI Mag

what is the top speed on this boat? Guy told me 75, but his add said 65. and have found everything from 62-75 stock. someone please give answer to different combo's.

include stepped hull or not, motor and prop if you know it.

Thanks

They only made the step and big block for a few years, from what i have heard, it can be a scary ride.

Yes this is what i am finding but all the ones that talk about speed either have regular hull with the old 454, or a step and a smaller motor. I want it to be scary. I want to have to learn to drive it. ha Thanks for imput. amybe someone will know. I found out it is a 454 MPI MAG motor, bravo one, and a stepped hull. BONE STOCK,

Try Donzi.net. Some of the guys there have run about every possible configuration for that boat from a 350mag to a Procharged 454mag. I think that someone on that site had one with a 502Mag. I don't remember their numbers.

I know that the 22ZX step hull with a 454 MPI (non mag) runs 60 mph. I also know that it does not take much power to wake up that hull. I drove one and thought it had a nice ride. Yes, it will spin out like any step hull.

I know of one with a Procharged 350 mag that runs high 70's and Procharged 454 that runs in the 80's.

Hope that this helps

Thanks good info.
I will try over there too. and check back on this one too.

A friend of mine has one with a basically stock HP 500 that runs 81mph GPS..:cool-smiley-011:...



Doug

That is a great platform to use as a starter. I would probably use that 454 MPI as a base to build a hot sleeper. With some Aluminum heads, bigger cam, cleaner exhaust you could see mid 80's. I think that above that it starts to get out of hand.

Or you could just Procharge it and hang on.

Either way, there will be no problem getting it to go fast for not much money!

I would guess that in stock for it will do mid 60's

I love that word BASICALLY:DSo what does that mean:D

well I am looking to cross the 70 mark. and sleep two on it. and hold a cooler or two. so I think i will be good.

You should not have to do much to a 454 mag to do that.

Mid 60's GPS With the MAG get a labbed prop and upgraded exhaust and you will be very close to 70.

Can someone explain the labbed prop? i have grown up ona boat and not sure what that does to it. and change exhaust?? its strait through the hull, so I am assuming you mean headers? what do they run for a boat? never had on a boat only cars.

It has a Super Sucker carb spacer on it......


So in my opinion it's basically stock.. :D


Doug

Yes, if you want to cross 70 it will take more than a labbed prop and exhaust. Cam and head work with that will get you to 75.

I have a 98 donzi 22zx with a 99 454mpi and top speed is abouy 63. Nice boat but a little slow for todays standards!

22zxla,
Is it a stepped hull? and is it a mag?

It should be stepped if it is a 98. I would bet it is a non-mag.

There was a guy on the Donzi net that claimed he broke 70 with a stock 454 mag MPI. About 5 very knowledgable people quickly proved him wrong.

A 22ZX with a 502 Mag will run 69 on the GPS. That has been verifyed by someone that knows the boat very well and can drive it just right. He had it propped perfectly. I think he was running a 25" prop. I can find out exactly.

A 454 Mag should get you around 65-67.

If you want to break 70 (a real GPS 70 not pitot speedo) you will need around 450 HP to do it right.

That would entail:

1. A more effecient manifold or headers (Stainless Marine, EMI, Lightning, etc)

2. Bigger cam

3. Valve Job and probably some punched out bigger valves (eg the size they use in a hp 500)

4. Reprogrammed ECU

That will take you over 70 with authority.

Doing just the manifold alone will get you close due to weight savings and a few more hp. Maybe 68-69 in the right water conditions.

I would think that hull with a 454 mag would easily hit 70. I had an 89 22ft Checkmate non stepped with that motor and it ran a real 68 on gps. drive was a bravo with a 3 blade 25 p. there was a couple Donzi 22's on the lake and in rough water I couldn't keep up.

sorry, yes its a stepped hull but not a mag. Think its the 330 hp.

No sir. It won't The Donzi is probably a good bit heavier than the Checkmate. That is why they like the rough water.

It is a great platform to mod. With a little power it moves on out.

The same can be said for the 26ZX:evilb:

I had a 27ZX non-step hull. I could run WFO in it when others were heading in.

You will need about 400+ Hp to get into the 70's. The Donzi's are typically heavier than the other similar sized boats on the market..

Also ZXXX Donzi's posts are pretty accurate.. I can speak & vouch based on my personal and professional experience with the Donzi hulls.. :) Jamie / lakeside

.

haha ok, we are all talking GPS speeds and i like that becasuer i know the speedo's on boats are normally off. but what do you think the speedo says on this boat. think it showing 75 and thats why the guy says that?

so whats the cheapest mod to help the most. (best bang for your buck) how where would it put it. mph

easiest & least costly to more costly & indepth:

Propping the boat correctly if not already done.. it could grab you 1-4 mph

Beyond that upgrading the exhaust to a lighter better breathing system. = Weight reduction & small speed increase posibly an additiona mph or 2

Altering drive height could gain you another couple mph

Doing internal engine performance upgrades or adding a supercharger.. Gain is dependent on how much you are willing to spend & how far you want to go..

;) Jamie / Lakeside

If you want to really move and the engine is relatively fresh, slap on a Procharger. That will be good for at least 10 mph, probably 15 mph. Jamie here has done it on that boat with a 350mag. He can tell you.

If you want 5-8 mph, do the cam, heads and exhaust.

Do both and the boat will be out of control fast!

Other than that yout increases will be small. Also, don't think that s bunch of the small changes will be cumulative. Let's say you can get a mph for doing a better aircleaner, then 3 mph for exhaust and 2 mph for a cleaner ECU program. The sum total of that will not net you 6 mph.

231 hours. thought about a procharger.

With over 200 on the clock you would want to do a leak down & compression test before boosting th engine. If all is in spec you could procede, otherwise if your insides are worn it will most likely give you grief.. :)

If you do have wear you may be better off doing a big NA build instead and having a fresh engine in the process.. ;)

If you want to look into it further feel free to give me a shout.. :) Jamie / Lakeside

I had 280 hours on my 502 mag and slapped a procharger on. Got two seasons without a hitch. I am rebuilding now to go bigger.

You will get the biggest bang for the buck with that. Make sure that you set it up right.

There is some merit to the rebuild and go big power NA. High 70's to maybe 80 with a fresh motor has some pretty good merit. It all depends on how long you plan to keep the boat.

I had a 99 22zx with the 7.4 MPI (310 hp) it did 63 consistently, once on a cold day with little fuel and helpful current I hit 65. For a little boat it was pretty good offshore, and you can sleep 2 in the cabin. Mine was blue and yellow with the stepped hull, beautiful boat.

IMO don't waste your money on a labbed prop you will just end up having to replace it when it throws a blade or gets cracked, its not worth it for 2-3 mph, better off with a 5 blade to get a better cruise speed which is where you will spend your time anyway. For the price of a labbed prop you could buy one that has great top end and one that is good all around.

My 99' 22ZX w/454MAGcarb/Bravo1 did 70-71wot....Stainless Marine exhaust system, 25" 3-blade labbed Mirage. No step, 385hp @ crank stock, probably 400+ w/ exhaust. Every 20hp gains about 1mph, on average up to a point

ooops, I meant 1997 Donzi 22ZX....

I had a 1999 Donzi 22ZX, Stepped hull, 454 Mag EFI ( 385) HP, Imco Power Flow exhaust, reprogrammed ECU, air filter, external Hydraulic steering and a 24p Bravo 1 prop, it ran 73-74 on GPS all day, I later added a Procharger and it ran around 82.7 with 3.5 psi of boost, but it was a scary ride, I never got full throttle. It is a drivers boat, like all the Donzi Classic models, it was my favorite boat I have owned, I wish I never sold it.