Hydrostream HST with 225 Pro-Max CLE

[stv1991]

A friend of mine has an '89 Hydrostream HST with a weight of approximately 950 lbs. He is running an extremely low hour '95 225 Pro-Max with a CLE lower unit. Setback is 10.5 inches. Wants to keep the motor stock with the 6750rpm rev limiter intact. He is running a 28 pitch Hoss cut chopper reworked by Randy Pierson to about a 29. This is his best top speed prop currently but it doesn't carry any weight. He feels there is a better set-up. First off: are mid 90's possible with this stock set-up? and Secondly: what would be the best all around prop for this set-up? i.e. top speed & weight carrying ability.

Boat and motor probably have less than 30 hours on them total and have always been garaged 100% of the time and are immaculate. He has a real problem carrying any weight with this hull at speed. Looking for suggestions.

Thanks in advance.

[bigboy]

Hi,

What is his topspeed? You left that out... I think 90's should be attainable.

Get some pictures of the boat. Less than 30h wow that's as good as new.

There is not a single prop that works best on the HST. It depends on the weight a little. I think an ET, Hoss and Srx are good props for the hst.

[stv1991]

He says high 80's currently is what he is running with low fuel and solo flight. Would like to get into the low/mid 90's. Would there be any advantage running a 4 blade over a three blade as far as weight carrying ability? How much would a 4 blade affect top speed?

[wideglide55]

One guy on here has an HST running in the 100's,you need to talk to him,can't remember his screen name but he obviously has his setup right.

[banchee6]

friend of mine was running an offshore cut, ( kinda close to a hoss copy) on his ally xb2002 and at 7000 rpm he was running 90 mph with a 28 pitch. so low 90's is possible with the correct set up.. cuttin the rev limiter out won't hurt your reliability as long as you are careful at what you turn.. that stock pro max is safe at 7000 rpm... just my two cents....Eric B.

[JUPITER PULSARE]

I just bought a 1991 Canadian Edition AE21 (HST bottom) and will be rigging it soon. I did get some information off the old Hydrostream Registry. They seem to indicate that the HST (unlike most Streams) runs better with the propshaft 1.5" below the pad. The article said to drop the motor and allow the boat to do the work...the speed will come if you don't run out of distance. If the motor is too high you can't carry the bow...the Hydrostream Registry also said the HST's don't require that much setback...6" of setback was enough??? I'm not so sure about that and plan on putting a 10" hyd jackplate on my AE21...good luck with your setup..sounds like a real nice boat!:thumbsup:

[mrcrsr]

I just bought a 1991 Canadian Edition AE21 (HST bottom) and will be rigging it soon. I did get some information off the old Hydrostream Registry. They seem to indicate that the HST (unlike most Streams) runs better with the propshaft 1.5" below the pad. The article said to drop the motor and allow the boat to do the work...the speed will come if you don't run out of distance. If the motor is too high you can't carry the bow...the Hydrostream Registry also said the HST's don't require that much setback...6" of setback was enough??? I'm not so sure about that and plan on putting a 10" hyd jackplate on my AE21...good luck with your setup..sounds like a real nice boat!:thumbsup: funny, just ran captn steve's hst yesterday w/ a modded promax i built, peak speed of 96 was reached w/ the propshaft even w/ the pad, any higher and the speed would fall off, any lower and the speed would drop off, and hst's like setback, both that i work on here(ben's and steve's) are running 10", ben was seeing 87 w/ a 2.4(probably 190 hp), steve's engine is probably 240-250, and i feel w/ a little tuning/setup work steve could go over 100 w/ the promax, ditto for the cle, at around 91 or so the rear of the boat wants to come around, also used a mercury 14.5 x 30 et, steve's boat definetely feels way heavy compared to ben's hst

[pyro]

That's not too surprising. With more setback, it will require less trim to fly the bow, and more setback allows more height. If it didn't have as much setback, it wouldn't like the height as much. The setback will let it carry weight or a bigger driver with less trim. It all depends on the individual boat/motor/case/prop/driver combination. Change any one factor, and it's all out the window. Also, some HST's weigh more that others. Some owners have re-built and drastically lightened them to find that they run much better with a wider range of props and carry a load better after the improvements.

[JUPITER PULSARE]

Hey Charlie, I think the gearcase would have alot to do with how high the propshaft should be compared to the pad; I'm sure there's a difference between running a Sportmaster, CLE or Bobs....as I found out with my old
Talon 21. It should be interesting as I get deeper into the build as to what I ultimately put on the boat.....but it should run 90 plus all day long!!!!!

[halveb]

I have a 1998 HST with a 2.5 EFI and run around 16 inches of setback. I originally had a Stainless Marine 12" setback bracket with a broken hydraulic jack plate for a total of about 16" of setback. I replaced it with a 10 inch setback bracket (there was so much lift in the the SMS bracket my motor wouldn't even be in the water with my new operating jackplate) so my total setback dropped to 14 inches (still quite a bit of setback).

It might be my fat butt but the boat hated the new setup and would porpoise like crazy. Everyone says you can drive through it by hitting the trim getting the air under the hull and punching it but no amount of squirreling around could get the boat under control and I have driven this boat for 6 or more years. Finally added 2 inch spacers this year that I bought since I started having the handling problems and the boat settled down and ran right again.

If I lost 30-50 pounds I might have to take those extensions off but that way it is currently it runs best with that amount of setback on it. Your mileage may vary.

[Charger200]

King gill was in the 100's but hes banned now, you might be able to find some posts by him as they hav not been deleted, but i dont know if his threads are still around.

jay

[Charger200]

http://forums.screamandfly.com/forums/showthread.php?t=181487&highlight=hst:cheers:

[mrcrsr]

i could break 100 mph if i had more seat time in the boat as it sits, and thats w/ a 225 promax, not even a 260

[Capt.Insane-o]

Hoss Triton was the best when my HST was a water logged turd. They are a strange duck sometimes. I went though at least two dozen props and set ups before finally getting how this hull works. Plus a few bottom changes. The lighter the better. They absolutely hate weight. The fact that so many need to run two miles of set back is a good clue.

[mrcrsr]

Hoss Triton was the best when my HST was a water logged turd. They are a strange duck sometimes. I went though at least two dozen props and set ups before finally getting how this hull works. Plus a few bottom changes. The lighter the better. They absolutely hate weight. The fact that so many need to run two miles of set back is a good clue.
i'm used to the my virage, the hst feels heavy

[baja200merk]

my friends got an old stock 200 johnson on a hst with a stainlessmarine set back bracket (like 18in). Me and him in the front 20 gals of fuel 28 chopper 91mph.

[Capt.Insane-o]

Mine is down to right around 600 lbs. Running 6 inches of set back. The trick is to get the ass loose while still keeping the bow up. Too much set back (on my particular hull) pinches off the tunnels and leads to all kinds of handling quirks. It took a lot of props, I ended up almost full circle with a little different weight balance. It drives like a slot car.

[Charger200]

so how does the AE 21 perform, Same hull different deck if im not mistaken, so is it just as much of a fine tunning game like the HST?

jay

[Hydrospeed]

I run 12 inches of set back on my AE-21 works great. You just need to learn how to drive it.

[JUPITER PULSARE]

I run 12 inches of set back on my AE-21 works great. You just need to learn how to drive it.

How do you have your setback broken down?? 6" bracket/6" jack or 10 jack with 2" spacers, or 12" jackplate?? etc. I'll probably do a 10 hyd jack on my AE 21...