Estimated top end speed???
 

We just bought a 2000 222 with a "0" hour rebuilt 350 Mag and a Bravo III outdrive and factory Corsa exhaust. The boat currently has 26 pitch props with a 2.20 gear ratio. We will be running on a lake at 6000 ft. I believe we will have to change out the props to a lower pitch which I will do once we get her on the lake and find out the WOT rpm's. But my question is what should I expect to get for a top end speed once she it properly setup????

Re: Estimated top end speed???
 

Every boat is unique, and it will greatly depend on the prop. But since your just asking for opinions, I say no problem in the mid 50's and you should be able to get 60 properly propped.

Let us know. And congratulations on the new ride.

Re: Estimated top end speed???
 

My 23' with a 350 bravo III unsure of pitch props on the GPS ran 46-48 WOT

Re: Estimated top end speed???
 

Thanks, I am hoping for 45 plus, 50 would be great especially at 6000ft.

Re: Estimated top end speed???
 

Hi
I have a Z222, 2001 with a 496 HO MAG with a Bravo 3 drive, 30" props I have gotten 62 miles per hour on it. I think you should get in the mid 50s which is preaty fast on the water, I am sure you will be happy with the results
Regards
Bill

Re: Estimated top end speed???
 

Big Red is only slightly comparable, but this is my story and I am sticking to it. The 1997 Z210 with a 5.7LX Alpha drive and 21-inch 3-blade ss prop has seen 54 mph on the GPS with just me on board at 800 ft msl. She'll make 50 with a full load of passengers.

Re: Estimated top end speed???
 

I thank you all for the responses it is amazing how similar boats will get such different out comes with top end speed. I forgot to add that this is not a stock 350 Mag, it has forged pistons, different cam, and has been ported and polished. We are expecting 325 hp and a much better torque curve.

I bought the boat with a cracked block (due to improper winterization) and had a block build for this, thought about a 383 stroker but opted for a mild power increase over the cost.

We are picking it up on Thursday, can't wait to it to warm up enough to get her on the lake. I will post the results when we get them.

Re: Estimated top end speed???
 

Had my boat out this weekend, the speedo read 54mph @ 4100 rpm. Does that sound right? Don't remember what kind of prop I have.

Re: Estimated top end speed???
 

i also just purchased a 2000 Mariah 222. It has 142 hours on the boat, with an aftermarket fuel injected 350 mag (10 hours on the motor). It has 24 pitch dual props, bravo III, etc... I took it for its first run last Sunday, and we hit 54 at 3/4 throttle. I didn't open the throttle all the way up. I think it would hit 58-60 as it is now. If I were to go up in prop pitch, I could easily get 60+. Let me know how things go with your boat, I'm really curious as to how it performs for you.

Re: Estimated top end speed???
 

That sounds too fast to believe. My speedo reads 5 MPH fast. Did you check the speed using a GPS?

Re: Estimated top end speed???
 

People shouldn't quote speeds unless they are GPS.

Re: Estimated top end speed???
 

yeah, i used the "Speedbox" app on my iphone. I assume you would qualify this as a GPS? I only checked it once, but its always accurate in my truck and on my dirtbike. If you don't already have it, give it a try.

Re: Estimated top end speed???
 

I use my phone also. GPS is GPS, so it's accurate, unless it's locking up like my Droid likes to do.

My 20 ft Z202 with a 260 hp 5.7 Merc Alpha 1 did 53 with just me. But now that I have a bimini and smart tabs, it's dropped to 50.

I don't see how yours could be so much faster.

Re: Estimated top end speed???
 

My 222 has a chevrolet fuel injected ram-jet 350. From what I've been told, it is not a normal boat motor. I'm not sure of the exact horsepower. I'll take a screen shot of my GPS when I'm out next and will post it to this message board. If your wanting more speed, i suggest getting a ram-jet. Its about a $7,500 motor, not counting installation, etc... I don't have trim tabs and neither of the bimini tops are on the boat right now. I was told that once the motor is broken in, a computer could be connected to it and adjustments can be made to increase the horsepower and increase the top end even further.

Re: Estimated top end speed???
 

Ram Jet Info:

Summit Racing Equipment | 1-800-230-3030

Re: Estimated top end speed???
 

I want one! I would love another 100 hp! I heard that changing from EFI to MPI would bring me up to 300 hp, right?

I would love to see some videos. Not because I don't believe you, just because I want to see it in action.

Re: Estimated top end speed???
 

Remember, non-marinized engines are a ticking time bomb. A car engine is NOT a boat engine. It can be done but there are a lot of modifications that need to be done to do it properly. Starters/alternators/distributors, pretty much anything elextrical needs to be marinized or you are just asking for a fireball on the water. The good news is, the water will eventually put out the flames..... while you are swimming away. Hopefully whoever did yours did it right!

Re: Estimated top end speed???
 

And engine is an engine, it's the bolt on items that are marina specific. I would hope it's all been converted, but if not, it wouldn't take a whole lot of effort to convert it.

If it hasn't, remember, if you blow someone up, you'll be in big trouble.

Re: Estimated top end speed???
 

If an engine is an engine... Why are "Marine" intakes banned for stock cars?

Re: Estimated top end speed???
 

You mean like NASCAR?

Re: Estimated top end speed???
 

I don't know about NASCAR... but at our local dirt track, Marine intakes will disqualify you.

Re: Estimated top end speed???
 

did some googling.... seems quite a bit of differences between "Marine" and "Auto" engines.....Marine Engines Versus Car Engines:

Re: Estimated top end speed???
 

So, with that kinda price tag I would hope it was actually done to marine specs. If it wasn't, there's reason for concern, if it was, dude you've got an awesome powered machine!:eek_animated:

Re: Estimated top end speed???
 

Yeah, it was done correctly by a professional marine mechanic. It has all the proper marine stuff on it. Can't wait to get it on the water again.

Re: Estimated top end speed???
 

That is awesome. I'm serious, I'd love to see some videos.

Re: Estimated top end speed???
 

I'm hoping to get it out on Sunday. If I do, i'll post a video, or atleast a few pics.