Fastest 26
 

Who has the fastest 26 Donzi 90++ MPH?

I would love to know if anyone is slinging 90+ in that hull. I have heard it has been done a few times.

I somehow think that one that Eddie is putting together will crack 90 easy.

I know it is still accelerating at 87!!:drink:

and I know it is not working at 85. I was moving along and just smooched it up. I still had a way to go and that was with that cut down 30

I was all worried that I might have to put on big training wheels but it was very settled.

I will still do the planes though. Just waiting on a deal like those ones I was carrying around the other day.

90 and climbing

95 and climbing
 

Getting kind of crazy.

Nice !! :cool-smiley-027: getting close to tripple D's :eek: Steve

Good going Bill .
Mines gone backwards since fitting extension box and chining
bad at 80 !!A 2" shortie being built and and motor coming out to jack
box up in an effort to correct before next race on August 24.Will post
results in an attempt to get near your figures !!!

I sent you some pics Trevor. I was wondering how yours was going. Mine seems pretty happy at the stock X with standard lower. X is still high enough where I have to work it up on a plane yet am not getting prop slap/surface piercing problems.

I know another guy with a more agressive X, he has had to go to a 5 blade. He is not running near the power that you and I are pushing so I don't know how his boat does in the 80's.

I may try a 5 blade this fall. It will be one of those special days when I feel like risking my drive. It just might break 100.

I am going for some real tabs. Mine does run smooth until you hit a bunch of cross wakes and you have to ease back to get it settled. Not really a good feeling at 90. I have had it moderately out of control this way. I think that Eddie and John have had it way out of control.

Keep me posted on yours.

Bill

Ooops !!!!
 

Hi Bill .Have been monitoring your progress which i must say
has been pretty impressive .Mine has had a turn for the worse
as i blew my motor up whilst racing or flying a lot !!. You guys forgot to set the rev limit in my ECU when it was remapped !
Am now installing a 525efi and will see how she runs then .
I had jacked my extention box up in what i think was a successful attempt to cure my chinning.Am thinking will be needing a 5 blader then but what pitch . . . suck it and see i
rekon .
Regards Trevor :ernaehrung004:

I hate to hear that. The 525 is a good option if you air it out and stomp it in salt water. I run in lakes so I am not as worried about trashing a drive.

Keep me posted on your project.

Here is a pic of the 850

ZXXX Donzi - what are you running for a block, and how much boost ar you running?

540, Brodix heads with 8 lbs.

It will continue to pull to 942hp at 9/lbs. I don't run it that hard though. It has plenty of power for that hull

I am looking into punching out my 502 .060 stroking it, porting the heads and running 5 psi of boost. Not sure what that will get me but last year before i blew up the motor I gps it at 80

Mine started as a 502 mag.

You should get into that 80's with that combo. I would think that 85 will come easy.

Eddie Young did my work. He can speck out a cam.

Did you have to ring your head, or what kind of gasket are you running? Also do you have any problems running it hard for a long period of time?

Eddie is a custom engine builder (Young Performance). It is one of his engines. It is built to run. It flows TONS of oil. He bored out the oil passages and had a custom 14 quart pan built. The heads are not ringed. I think he used cometic head gaskets.

It cruises effortlessly at 60-70. I usually run at 60. It is not building boost at that speed. Running hard? I flow all sorts of water and oil. I also have alum heads so they don't heat up as bad. I usually don't run over 80 for too long. It is very stable to 85. Between 85 and 95 it is all good until a side wake upsets it. I had some K planes put on earlier and that seems to help. It is still pulling hard at 95. I am trying a 5 blade to see how that works out.

I am going over to replumb the cooler tomorrow. I am moving up to a 570 cu intercooler tomorrow and moving it to the firewall.

We will see what that does for the intake air temps

Thanks for all your info.

If you are going to up the ante on the cubes, heads, flow etc, you will need bigger injectors and a decent base calibration for the ECU. Just something to remember. While you are doing that, I would recommend changing over to a better boost reference regulator

What do you mean by "better boost reference regulator"

The typical procharger setup utilizes a boost reference fuel pressure regulator. It works ok but as you go up in hp it is not reliable enough. If you heat it up and it sticks you will lean out and melt pistons in a hurry.

The procharger regulator has been used successfully up to around 700hp. If you are going to the trouble of freshening everything you should do that too.

What would you reccomend for a fuel pressure reg?

There are a few options out there. Your best bet is to talk to whoever is going to do the cal on the ECU. I would let them give you the recipe for the combo. Everyone has an opinion but their will count the most for your situation.

My engine has evolved to the point that the only thing that came from Procharger is the blower, bracket and pulley. For instance, I could tell you what injectors I am using and if you used them but your tuner thought you had 55 lb injectors, the whole engine would be WAY out of tune. The same thing would be true with my fuel pressure reference setup.

I would suggest talking to a tuner, tell them how much power you want to make and they will tell you what you need to do. It will be well worth what you pay for.

103 MPH! Getting kind of crazy. It was actually pretty stable yesterday.

Thunderusone was there in his Outerlimits at 110.:evilb:

new donzi
 

Three weeks ago I purchased a 96 27zx with Bravo 3 and a 502... ~400hrs mint condition. Freshwater only. This boat has seen 55 with 4-6 people. I have been looking at procharger vs. whipple exhaust ect. I have a few questions for you experienced guys...

What kind of abuse can that bravo 3 take? 950hp??

Should I supercharge it or do anything with those hrs on the motor??

If I have to rebuild first I might as well build one hell of a motor after my season is over here in Texas. What are you guys running and how mch did it cost you to crack that 100mph mark?

Thanks

Alex

80k to start:drink:

Yep... Burnt a few hrs on here looking at boat stuff and decided I need 25K for the engine and another 7500 for an XR drive... darn.

Did find a procharger with ecu remapped and fuel pump for $3500.00 said ~50hrs but you never know... now worried about two things. Engine hrs and drive capabilities.

Any suggestions would be great.

I have heard one rumor but never actually heard of another 26 or 27ZX breaking 100. It is a really nice hull up to 85. It is not bad up to 95 but if it gets out of shape then look out.

Your 27ZX is a non-step. I had one. It is a great hull but needs lot's of power to get up and go. You would probably need over 1,000 hp to see big numbers. Lose the BIII and add some boost with a few goodies and you can have a very nice 75mph boat. You will be able to run that 70+ in nasty water that will send some of the other guys home. That is nothing to sneeze at. Oh yeah, don't just slap a huffer on that 400 hour motor.

If you are dead set on having a 90+ mph boat, your best bet is to sell what you have and buy Bryan Rose's 27ZX. It is a light layup and one of the first twin steps made. He has spent YEARS dialing it in. It is loaded to the max and very clean. You would spend an EASY 40k over what he wants for that boat to duplicate it assuming you could find a similar step hull 27. Not to mention a couple of years min figuring it all out.

Donzi ZXXX, who is a tuner that I could talk to as I don't believe that there are any around where I am at. Will they just need to know what I am running for a block, cam and so forth. I took the motor in today to get bored and stroked to a 540. They were going to get a cam for it, not sure what all I am needing to do here. Any help that you could give that will steer me in the correct direction would be greatly appreciated.

I think you actually may have run 105 mph. At one point.....I was at 105mph and you were EXACTLY beside me. 110mph was the minimum speed that I could actually put any distance between us. That was INSANE! I felt like we were on the Colorado River canyon racing. 3 wide with 5000hp thundering down the gorge. UFB! I still get jacked up talking about it. Everytime I got my chit set ready to stretch its legs....I was at another left or right hand turn. They were coming up quick at 100+. I hit 112 mph at 5600 later that day back over by the other damn....same thing....got everything set....had just got on the gas and ran into a bunch of boat traffic. I think the new wheels are going to be perfect on mine. CONGRATS again! I'm happy for ya brotha! I am just glad to say that I know the DONZI ROCKSTAR!

PS....thanks again for making me spend a grand in 1 day on gas. We ended up running over 150 miles just on Saturday.

Thanks for the reply guys...

Have seen some 700hp 502's for 12k freshly rebuilt and new xr drives. May get into something like that and sell off my B3 and stock 502 in the next few months. Think I'll ride this one out till I decide to snag a larger boat... I like the 43ZR :coolcowboy: but I do like to pay cash for what I own... never been a fan of payments. May have to hustle for a year or two before I can drop that kind of cash, after all I am only 29... and the few lakes close to me are too small to run huge boats...need a lake house up north. Well people do run boats on lake lewissville but the real place in Texas to go is Texoma and I don't want to tow a 27'8" boat four hrs both ways...too often.

It was a very large time. And yes, the guys at Hidden Harbor remembered you very well when I went over on Sunday!

I ran part of the lower lake today. 80 was nothing like 100+!

I only pay cash.

700hp on a 502 for $12k? Not for anything that will last. You want to sell the 502 and have a drop in for the ZX with any beans you will need to drop $25k MIN. $35 k to really make it run. You need at least a 540 and should think about boost. Add $8K for the drive and $4k for the steering and you are just getting into the game. You will then need to drop a few k on goodies and you are just starting to roll.

I have spent years messing with the ZX hull and have a pretty good idea of what it takes.

Drop me a pm.

If they can't tune a MEFI, I dang sure would not let them get a cam. I probably would not let them set up much of anything for that matter.

Heads, cam, exhaust and tune all need to work together. If not you are pissing into the wind. Sorry to be blunt but that is how it works.

Fukker! Do you have any openings over at your shop?:drink:

I only have my work done at places where they have a PhD in Quadrotor and XR!

I hear that they are getting into stereo rigging too!

Too funny!:evilb:

Ya'll some crazy mudda fukers!