River_Runner

I am searching for anyone with experience running a 22 ZX over 90mph. Currently the boat is running 86mph with standard bravo lower. I would like to know if a stand-off box and/or -2 shorty has been tried with success? Or even if someone has 700+hp running strong speeds. I have searched many previous threads without success.
This is for the 22 ZX not the classics.
Thanks!

boostbros

well im not sure of the donzi but i can share running big power in a single hull we run a 24 or 25 active thunder early 90s we run a standard XR no extension box with 380 tabs natural 540 around 800hp we turn it up to around 6500 its fun and predictable into the 90s it may even go 100 but i don,t have those balls anymore its great here on the great lakes you have to drive it but you can always get home when the wind kicks up some 4-6 footers

Donzi Z22

Try Facebook Donzi Restoration Group.Look for Frank Civitano. He had one in the 90's

scarabman

iTrader: (1)

He certainly did, and he ran the crap out of it too! With his wife sitting next to him!

NC03GT

what set up do you have to go 86? Im currently at 71 with a stock 454 mag. Debating going blower or going bigger cubes.

Andrew56

A big part of the equation is what drive you are running. If you have a bravo you could put a shorty on it. Which should give you 3-5 mph. If you have a trs then their aren't a ton of options. Regardless of drive you would have to make at least 600 HP probably closer to 650 HP to be safe. Either a NA big cubic inch big block or a blower motor would make that power without trouble. The 454 would need a decent amount of work, including a blower to get up to the required horse power numbers. I have a 20 cigarette that ran 79mph with a 550 HP blown 454 and a deep drive. With some engine work, aluminum heads, cam, pistons, and rods, and a new IMCO SC-3 drive we are looking to make 650-675 and run in the low 90 to mid 90's.

Donzi Z22

Andrew are you running a zx step hull with a neg 2-3 ?How does it handle ?

Andrew56

I do not have a Donzi. I have a 20' cigarette, which is falt bottom boat. While its not the same boat, many people see similar results with drive changes. From what I have seen almost every boat drives better with a 2" shorty. Better cruising and top speed as well as sharper handling and more stable at higher speeds. If you are going to a shorty I would also look at the Max Machine Worx drive plate. It helps to get rid of porpoise and makes the boat even more stable at speed. It also makes planning easier. I will not be running my 3" shorty until next summer as i'm in the process of putting it on right now. If you are in the market for a complete IMCO-SC drive with a 3" shorty, I will have a fully rebuilt one for sale within a few weeks.

Fleetwrench

We just bought a 01 22 ZX w scorpion 377, bravo1 XR w shower, 4 blade 26P and runs in the ‘80’s so far… I didn’t have the balls to push more.. lol

NC03GT

Was that gps? Does yours have a blower? My 22zx with a 385hp 454mag only went 72gps