Props on the 28...

Tim G. · 11-12-2003, 08:59 PM

What props are you guys running???
FYI my boat is a twin BB.
I have 26 B1s, but they hit the rev limiter hard now that I have the new exhausts..
So I got a set of 26 Hydromotives.. Word has it that they pull farther...more like 28 B1s.. along with more transom lift...which is exactly what this boat needs.
BUT,
I tried the props last weekend and they broke loose immeadiately.. Couldn't get the boat on plane. I'd say they blew out at less than 2500 RPM.

I spoke to Jo, who recommended adding the diffuser rings to the props to help with the blowout..
I'm with Jo on this... but those diffuser rings had better be "miracle" rings... the props are all but worthless at this point.
I'll order the diffuser rings, but I want to hear what props you guys are using...
Thursty Turtle????

Yes, we'll be in KW supportin' the team!

Tim G. · 11-12-2003, 08:59 PM

'nother pic

Tricky919 · 11-12-2003, 11:35 PM

Tim pm me with a # i can call you at, I tried a bunch of props on my 28 and i will tell you the results......

OPA · 11-13-2003, 01:23 AM

JO IS RIGHT I ADDED DIFFUSER RINGS TO MY HYDRO PROPS AND THE BOAT PLAINED OFF MUCH EASIER
A 28 W/ BIG BLOCKS

Thirsty Turtle · 11-13-2003, 01:40 PM

TimG
You saw the same thing I did with B1 28......a signifigant loss of that kick ass acceleration, and not enough uumff to spin the 502's to 5000 rpm. I went back to the B1 26...but I have the stock exhaust manifolds. You've probably gained another 200-300 rpm with the manifold upgrade. Not enough to go back to 28's.

They say the Hydromotive runs much truer to its said pitch, but there doesn't seem to be the blade area to push our boats.

OPA....we'd be interested to hear some numbers on your boats performance with them.

Tricky919....you too...spill the beans here on what you tried.

I've always thought a 26 repitched to a 27 would be an ideal prop for my boat on the Mississippi.

Bruce

Tim G. · 11-13-2003, 02:25 PM

Ok.. Jo said to get some 4 blade Hydros. They pull like one pich bigger Bravos, and give more stern lift.
So I got 26 Hydros, but they didn't have diffuser rings, so she wouldn't plane out.
Jo told me to call Hydro and get the DF rings and have them welded up locally... so that's what I did.
I spoke to Tom at Hydromotive.
I explained the whole thing and he too said that the df rings would help.
I told him about the 26 B1s.. but he still thinks that the boat might pull the Hydros turned to 27... but we'll try the df rings first.
Then we start talking speed. I told him that I was shooting for just under 80..or 80 if I'm lucky. He said no way...
I had him puzzled when I told him that I've seen 76 with the B1 26's.. He says it should have been more like 72, but that's sure not true...
He did say (like Jo did) that the Hydros give more stern lift than Bravos. That's exactly what this boat needs.

As far as RPM.. I could just get to the limiters before with the stock exhausts. Now the motors hit the limiters like a fly swatter...

So, having seen 76mph before, I don't see why these Hydros won't get 78. Then if I have the RPM, I can get Tom to turn them to 27 to get me at 80.

This thing has to do 80... I know it will. I know it will.
I really would like to try those 28 Bravo's again though. I got 4700 rpm with the stock pipes.. but now I might get to 5000. But then again they don't have the stern lift... but then they don't slip on take off..so then I could continue to whip everyones azz in 0-70....

Oh, and now one of my new SM manifolds has a water leak... I haven't found out where it's coming from, but the salt crystalizes around the band clamp where the riser mounts..???
WTF?

rchevelle71 · 11-13-2003, 02:40 PM

I have seen it hit 76, and I have seen it hit the limiters, and I have also seen what happens with the 26 hydro's, all I can say is it was ugly!!!!! Oh wait that was the weather.

8 days and counting til KEY WEST!!!!!!!!!

Jmemoli · 11-13-2003, 02:45 PM

Tim ,
I had a 2002 Pantera 28 with twin 500 hp 502 motors , bravo 1s' . I ran box stock 28 B1 . The boat would accelerate from 60 to 80 in 4-5 seconds , then climb to 86 mph ( on GPS) . Top revs were 5300 RPM .
The props worked excellent all around , but I would agree that the boat could use some transom lift as it is a bit ass heavy . I also ran a set of 27 3 blades which were good for 83mph at 5400 .
Jerry

Tim G. · 11-13-2003, 02:56 PM

Quote:

Originally posted by Jmemoli
Tim ,
I had a 2002 Pantera 28 with twin 500 hp 502 motors , bravo 1s' . I ran box stock 28 B1 . The boat would accelerate from 60 to 80 in 4-5 seconds , then climb to 86 mph ( on GPS) . Top revs were 5300 RPM .
The props worked excellent all around , but I would agree that the boat could use some transom lift as it is a bit ass heavy . I also ran a set of 27 3 blades which were good for 83mph at 5400 .
Jerry

Yep. Exactly what I was thinking... You have roughly 85 HP more per side and turned to 5300 and went to 86. I'd like to think that I can get my boat to nuge 80..
86 is getting it done..

Thirsty Turtle · 11-13-2003, 03:42 PM

Quote:

Originally posted by Tim G.

I had him puzzled when I told him that I've seen 76 with the B1 26's.. He says it should have been more like 72, but that's sure not true...

That's about where I am with 26's.

77.5 GPS down river....75.5 up river.....full load of fuel. Have never GPS'ed low on fuel.

Keep testing boys. I'm learning from you!

Bruce