My prop story...

[24RODjr]

We took the 26" prop to Bronson Hill to get some dings fixed (don't ask me how they got there...) and to get a pro tune done.
Mind you...we've turned a 28" on our 24" supercharged 454 tunnel, and have a confirmed GPS of 81 MPH (@4600RPM).
That being said, the tuned 26" got us up on plane quick, but the boat wouldn't even break 60! The boat, fully trimmed couldn't turn it faster than 4200 RPM.
Max speed with the 26" was 73 MPH....with the protune, it's now 59.8 MPH....
I'm taking it in tomorrow....any comments from the peanut gallery?
-Chris

[andy01]

Yeah I have a comment! RD took two props to them last season for the Nordic. I picked them up and the guy told me it was going to be night and day with what they did! It was!! It sucked ass! They did work great on some else's boat but not the one they came off of! I wouldn't take a prop to them.
Andy

[bigq]

put a smaller pulley on that procharger then add race fuel and ya got yourself a rocket. :D

[24RODjr]

bigq:
put a smaller pulley on that procharger then add race fuel and ya got yourself a rocket. :D See...but the only thing that changed is the prop...so....

[24RODjr]

racingrascal:
Yeah I have a comment! RD took two props to them last season for the Nordic. I picked them up and the guy told me it was going to be night and day with what they did! It was!! It sucked ass! They did work great on some else's boat but not the one they came off of! I wouldn't take a prop to them.
Andy Uhm....well...they still need to get the prop at least to where it was...no?

[bigq]

24RODjr:
bigq:
put a smaller pulley on that procharger then add race fuel and ya got yourself a rocket. :D See...but the only thing that changed is the prop...so.... Baa, it was an attempt at humor. :D it sounds like they degreed or cupped it too much, but I really don't have any idea, hopefully they or someone on the board does.

[Sandbar Mike]

Chris You should take it back to see what else they can do,
In the mean time run down to Teague and ask him to borrow a couple to test with to decide which is better for your ride.
Worth a shot
on another note
I helped a friend sell his Daytona so he has agreed to give me one of his lab 28"'s. I'm getting it in a few weeks. Your welcome to test with it.

[Charley]

24RODjr:
we've turned a 28" on our 24" supercharged 454 tunnel, and have a confirmed GPS of 81 MPH (@4600RPM).Damn 81mph in a 2' long boat?? that must feel alot faster :D
sorry couldn't resist.... that's BS...... If Teague loans out props that might be the ticket... are you running a Bravo 4 blade?

[DogHouse]

Hi Chris,
Your slip with that new prop is about 13%, which would be about right if the boat is running very wet. Did the boat respond normally to trim and pick the nose up, or did it feel like the nose was glued to the water? It's possible that they changed the shape and created too much stern lift for your boat. I would talk to them about it and have them rework it until they get it right and the boat is running nice and loose again.
The numbers for the 28" prop don't add up. You sure you were only turning 4600 RPM? That would mean less than 1% slip at 81 MPH... pretty good number even for a Cheetah!
-brian

[bigq]

Charley:
24RODjr:
we've turned a 28" on our 24" supercharged 454 tunnel, and have a confirmed GPS of 81 MPH (@4600RPM).Damn 81mph in a 2' long boat?? that must feel alot faster :D
sorry couldn't resist.... that's BS...... If Teague loans out props that might be the ticket... are you running a Bravo 4 blade? :confused: :confused:

[bigq]

DogHouse:
Hi Chris,
Your slip with that new prop is about 13%, which would be about right if the boat is running very wet. Did the boat respond normally to trim and pick the nose up, or did it feel like the nose was glued to the water? It's possible that they changed the shape and created too much stern lift for your boat. I would talk to them about it and have them rework it until they get it right and the boat is running nice and loose again.
The numbers for the 28" prop don't add up. You sure you were only turning 4600 RPM? That would mean less than 1% slip at 81 MPH... pretty good number even for a Cheetah!
-brian Well not to mention I think he would need about 580 HP from my calcs. I thought he was running the 7.4 with the blower. Stock was 315 I believe and even if it was a 50% increase that is only 472 that should put him in the low to mid 70's.Does this sound right Brian?
What is a good slip number anyway?

[24RODjr]

Yep...it's a bravo 4 blade.
As for the 81, I could be mistaken on the RPM...I didn't grill teague too hard on it :) .
Finally, thanks Mike....You interested in going up with the boys next weekend? I'll pick you up on the way.
-Chris

[24RODjr]

Brian,
What's the link for the prop slip calculator?

[Skullinator]

24 Rod something doesn't figure. I also had a prop done by them and although i lost 2-3 mph on top end the performance at operating speed 60-75 mph was alot better.81 mph @ 4600 rpm can't be right. I'm running a 25 talon with a 32" prop and i don't hit 80 mph until 4900 Rpm in a cat.The reason i lost top speed According to the experts is at 80+ Mph my prop slip went from 12 to 15 due to lack of a nose cone to help get more water to the prop. If any one has any other theory please let me know.

[Skullinator]

24 rod go to www.boatpropellers.com (http://www.boatpropellers.com) it's bronsons web site and you will find the caculator there.also chech your tach to make sure it's correct.

[THOR]

24RJr,
sorry to hear about your misfortune. I have heard the BH is notorious for doing this stuff.

[DogHouse]

Chris, I use my own spreadsheet for prop calcs. I can email you a copy if you want it.
Bigq, I think anything around 10% is doing good. I've heard people talk of lower numbers but I have never been able to achieve them with my boats. Then again I've always run stock props. I would like to try a lab finish prop someday to see what it would do in my setup.
I'm wondering about the nosecone issue myself. I still have the stock XR gear case and am running in the low 90s with a 28 pitch prop. I think a nosecone might do me some good but don't know for sure.

[24RODjr]

Ho-Leee-Shit!
I took it back to them and they almost didn't believe me about the performance loss. We shall see if they can get the 26" back to where it was.
On a side note, Anyone know where the REV limiter is on a 454MPI?
-Chris
P.S. Brian, please email me the copy of the spreadsheet. BH said we should run around 9-13% slip with the Cheetah, which is a "good low-spped tunnel." I think I should have taken offense, but as it hasn't been north of 90 I guess it applies. :D
[ March 11, 2003, 01:37 PM: Message edited by: 24RODjr ]

[Charley]

bigq:
Charley:
24RODjr:
we've turned a 28" on our 24" supercharged 454 tunnel, and have a confirmed GPS of 81 MPH (@4600RPM).Damn 81mph in a 2' long boat?? that must feel alot faster :D
sorry couldn't resist.... that's BS...... If Teague loans out props that might be the ticket... are you running a Bravo 4 blade? :confused: :confused: his original post said he was running a 28 inch prop on a 24 inch boat wink

[bigq]

Charley:
bigq:
Charley:
24RODjr:
we've turned a 28" on our 24" supercharged 454 tunnel, and have a confirmed GPS of 81 MPH (@4600RPM).Damn 81mph in a 2' long boat?? that must feel alot faster :D
sorry couldn't resist.... that's BS...... If Teague loans out props that might be the ticket... are you running a Bravo 4 blade? :confused: :confused: his original post said he was running a 28 inch prop on a 24 inch boat wink Oh, I see now, sorry not enough coffee yet when i posted. :D

[bigq]

24RODjr:
Ho-Leee-Shit!
On a side note, Anyone know where the REV limiter is on a 454MPI?
I believe it was 4800, but I don't think your gaining past 4500, 4600. Being the internals arn't the greatest on that engine I would keep them down to your 4600 mark, but that's just me.

[h2oski2fast]

This is a common problem, what they did was cup the prop, which will help get the boat on plan, hook up well at cruising speeds, but lose top end.

[h2oski2fast]

The first post with the 28" prop running @ 81mph with an engine rpm of 4600, sounds about right. Assuming you are running a 1.36 drive ratio, it would yield a slip factor of 9.7%.
[ March 11, 2003, 03:03 PM: Message edited by: h2oski2fast ]

[24RODjr]

Just got off the phone with Teague's shop. They said they reprogram the ECU to run at 4650. According to BH, that's 150 RPM over the factory setting. I need to make more calls tomorrow.
-Chris

[PlayTime]

[QUOTE]
Max speed with the 26" was 73 MPH....with the protune, it's now 59.8 MPH....
QUOTE]
Actually top speed was 61.1 MPH which is still alot less then the 73 MPH prior to protune. However, 24 Rod senior had to show him how to drive it. wink
He is just bitter cause he is now slower then the stock 496 Mag HTM. :D :D

[syke-o]

playtime where are those pics?

[DogHouse]

PlayTime:
He is just bitter cause he is now slower then the stock 496 Mag HTM. :D :D We knew that was coming! :D

[24RODjr]

Nucka Pleaze!!!
At least the Cheeter was out on the lake last weekend....where was the HTM? Gathering dust in Syke-O's Pops Driveway? What? Slow? It was faster than your boat last weekend...
Lots of talk from a French-man who doesn't like beer....what? Did you say something???
Oh...and as for the pics Syke-o...typical playtime...throwin' the cock-block...I think Jordy might have some competition.
'Sup now? :D

[PlayTime]

Think anger management wink
Keep talking the smack and that will further delay the post of all the magic pics. By the way I like the closed CAT over the Deck Cat.
Just my .02 cents though.
Just cause you wouldnt share the beer doesnt mean I dont drink beer. You HOG. :D

[syke-o]

Just cause you wouldnt share the beer doesnt mean I dont drink beer. You HOG. :D [/QB][/QUOTE]
share?? we had to pressure you into drinking one!!!!
next time we will bring wine for the frenchie..... :D

[24RODjr]

I don't think he can handle the Wine...think Bartles and James.
Frenchie can then "Thank us for our support..."

[PlayTime]

Syke-o I think you should change your name.
Any suggestions for the peanut gallery?
1) Beached4Ever
2) RentPWC2SandBar
3) Swim2CopperCanyon
4) WillBeg4Ride
5) Luv2Swim
6) ..Add your suggestions.
Lets help him pick a new name, if not for his boat at least for this forum.
wink wink
Serious note, let me know what happens with the prop.
[ March 12, 2003, 12:33 PM: Message edited by: PlayTime ]

[24RODjr]

So the truce is toast then? :D
My personal favorites are:
1)Float4Ever
2)WeBTubin
3)24RODPassenger
4)HTMRider
5)SwimThug
6)SuckinH2O
7)NoBoatNoPlayNoProblem
8)WifeWontLetMe
This is fun....
Nothin' but Love Syke-o
I'll keep the forum updated on the prop saga.
-Chris

[24RODjr]

That's the rumor right now...still waiting on an answer.

[Sandbar Mike]

24RODjr:
Yep...it's a bravo 4 blade.
As for the 81, I could be mistaken on the RPM...I didn't grill teague too hard on it :) .
Finally, thanks Mike....You interested in going up with the boys next weekend? I'll pick you up on the way.
-Chris Chris, I missed this a few days ago...
When are you guys going up?
I'll be at the parker house on March 21,22,23,I'd like to roll up meet up in havasu.
Thanks Bro

[24RODjr]

Mike,
We're going to be in Havasu at that time! We've gotta hook up.
-Chris

[Sandbar Mike]

24RODjr:
Mike,
We're going to be in Havasu at that time! We've gotta hook up.
-Chris Awsome, I'll give you a call next week

[jet4fun]

RiverDave:
24RODjr:
Just got off the phone with Teague's shop. They said they reprogram the ECU to run at 4650. According to BH, that's 150 RPM over the factory setting. I need to make more calls tomorrow.
-Chris So your saying the stock rev limiter on a 454 Mag is 4500 RPM?
RD has anyone thought of just calling mercruiser up and asking them?

[24RODjr]

There's a thought :-)

[Flashwave]

Mercury makes (made) 2 engines, a 7.4 MPI and a 454 Magnum which are sometimes confused with each other. The 7.4 MPI has the rev limiter set at 4600 RPM. The 454 Magnum has the rev limiter set at 5000 RPM.
Bronson Hill does all of my props and many other racers props. They built the Bravo props that took the Factory 2 kilo record this year. Of all the prop shops out there, these guys are the ones who will do to your prop what you ask them. If you give them wrong information...well... the old addage, garbage in garbage out. You've got to do your homework to get your props dialed in. RPMS, Speed (GPS), gear ratio and temperature.
J
[ March 18, 2003, 04:48 PM: Message edited by: Flashwave ]

[24RODjr]

These guys have an excellent pedegree, and once we get the particulars worked out I'm sure that the boat will be much faster than before.
Can't wait for the weekend. Gonna run a stock 26" on the boat and see what's what.
"Of all the prop shops out there, these guys are the ones who will do to your prop what you ask them. If you give them wrong information...well... the old addage, garbage in garbage out. You've got to do your homework to get your props dialed in. RPMS, Speed (GPS), gear ratio and temperature."
As for that quote Flash, I don't doubt that at all. You aren't the first person that has spoke well of this shop, and I'm sure you won't be the last. Bear in mind that I take all the negativity with a grain of salt (if I didn't would I even own a boat? :) ). There is a lot of sour grapes out there, especially with respect to the boating industry. I try not to be one of those people.
[ March 18, 2003, 06:52 PM: Message edited by: 24RODjr ]

[24RODjr]

BTW...nice website Flash! :D

[FastTimmy]

I tested my warlock last thursday at elsinore, it was sold and to be delivered on Saterday. Any way, I had put a new 450hp 502cid. in it and had to put a few hours on it and verify that it was a winner before I delivered it. However I did not know which one of my props whould work the best so I called the boy's at Bronson. I told them that I had a 24" bravo 1, a 30" bravo 1, and a 28" 4 blade semi cleaver Chad hill popeller (No relation at all to Bronson Hill propellers). They said of coarse that I would need the one prop I didn't have, a 26" bravo 1. Me being far smarter then them, I decided to go with the a 28" bravo 1 even though they advised the 26" bravo 1 was what I needed. Bad choice! I called the boy's from the lake later that day and gave them the scoop on what I was runing and where I was running. They took my info and said they would have a prop ready for me to test the next day.
I whent by there place on friday picked up the set up 26" bravo and took it home.
After giving them good data from the water at elsinore and even telling them that the next test (when the owner takes delivery of the boat) would be at lake Castaic they set up a prop that ran right where they said it would on the RPM'S and within 2mph of what they said. It also ran 6mph faster than any thing else I tested.
just my .02
Tim

[24RODjr]

Timmy,
Thanks for the input. Seems to me that what is missing is some quality data with a stock 26" bravo prop.
All I have is full speed with the modified version...not exactly the best basline to start with.
All of that should change this weekend. I'll be the 24' Cheetah doing passes on Havasu at around 0930 over by Crazy Horse.
Once I get the basline data, I'm sure that the prop can be better tuned to the needs of the boat (in english that mean more speeeeeeed :D )

[24RODjr]

It's been a while since this one had any data...but i hadn't had the boat out for a while.
All I have to say is the Cheeter is baaaaack....
We hit low 70's at 4500 RPM. I no longer fear Playtime's HTM :D
Seriously though, Many props (no pun intended) to Bronson Hill for getting us the right prop for the boat. They stepped up.
-Chris

[PlayTime]

24RODjr:
We hit low 70's at 4500 RPM. I no longer fear Playtime's HTM :D
-Chris I'll will strike fear again someday, just remember that :p :p :p

[PlayTime]

We hit low 70's at 4500 RPM. I no longer fear Playtime's HTM
I will strike fear again some day :D :D :D