Baja 342 Prop help
 

Ok picked up the new Boat.

2002 342 has 496 Mags, in it, spinning 26P Bravos... To me i think its to much prop? what you guys think (I think the mag HO came with 26P and they have 50 more hp).

ran it a little testing and 4200-4300 rpm was all I can get her too and that’s trimmed right at the blow out point.... you go more and it’s just pointless. I think I need to try 24P any thoughts? boat was doing 62 upstream.... with 1/2 tanka nd 3 people.

it is a full loaded 342 genny and AC. so its not the lightest.

it does not porpose. rides nice and flat.

You're right, somehow I misread the word pointless as porpoise. Must be tired. Sorry.

Get a set of Mirage Plus 23's - spin them in.

You dont need 4 blades but you can run them if you want.

mittens, I think we should try some23 Revolution 4's.
Let me know if you might want to do this.

Thanks,
Brett

I understood mittens to be running 26's not 28's.
Is this correct?

Rev 4 23's or Labbed 24 B1's are options as well as other offerings.

Thanks,
Brett

Wont he get he most out of Mirage Plus's? The Rev 4's didnt do anything on my boat.

The Mirage Plus props could be faster on the top end.
The Revolution 4 props should provide better all around performance.
As with any application, owners goals, driving habits and experience and each boats personalities come into play.
Knowing your goals and do some testing is the sure fire way to get to the target.
Getting another 500-700 rpm is the starting point.

Brett

You're right, this is going well,,,, not.:whistle: I think it's good I have these days off.

So what will stock 24p bravos do.

Im sorta looking for a pair of 26p for bravo one. Left and right rotation. Just waiting for the right price. Let me know if you decide to move those...

Yes, but have Brett put some cup in them. Better yet, run them stock and have Brett put some cup in them and you will understand why...

Theres a good looking set for sale in the Swap Show right now.

The rpm will rise 300-400. The boat should plane faster and accelerate faster.
The cruise speed will drop.
Labbing any of these props can improve over all performance.

Brett

If only I could find a used set. Haha found a left hand one, need a right would like to pick up a set of stock ones and then chose what I want to work with. My 26s are not in perfect shape so they will get played with / fixed once I have a spare set

[QUOTE=jmeng;3655376]Theres a good looking set for sale in the Swap Show right now.[/QUOTE

ya i seen them, i think a four blade 26p is too much as i have 3 blade 25p and im at 4800 rpm on a 1988 330hp twins. if i went four blade i think id stay at 25p from what ive read. sorry mittens not trying to hijack you...:party-smiley-004:

[QUOTE=roughwater;3656024]The B1 26 usually is 25" or 25" an-a-bit. in pitch.

[QUOTE=roughwater;3656024]
I think those old 330hp 7.4s were rated at 4600 rpm. If so you could afford to lose a few rpm. Plus the Bravo One 4 Blades always run about an 1" less than marked.

[QUOTE=jmeng;3656054]thats what im after is losing some r's, i didnt know about the pitch being less than marked maybe ill ck into those after all. thanks...

[QUOTE=A.O. Razor;3656041]you beat jmeng to it, thanks to you too...

I have a set........I also had a 342 Baja with 496 mags upgraded to HO's. It ran 68mph at 4800-4900 with 26 labbed Bravo Ones......FYI

Run the boat. You need to put 10-15 hours of seat time in so you can see and feel benefits. You dont have a baseline yet...

You will need cup. I know you dont want to hear it but spinning the props in makes the boat handle 30% better at 50MPH and picks up a mile or two at cruise and attacks wake better.

Have a set of 24P Bravo ones on there way to my house(with hub kits). probably will not get here before the weekend since its Thursday and all. But next week should get to try them out.

also will have my 26s touched up while testing the 24s. hopping it will get the rpms in the 4600-4800 range, and maybe 2-4 mph?

OK testing results for the 24p/


I am not a fan. rpms did go up, but speed was down at all rpms. I would rather cruse better and have a better top end then what this was. if you need a set of 24P they are for sale.

24P Bravo Ones
3100 - 30mph
3500 - 40mph
4000 - 50mph
4800 - 60mph thats it....

26p Bravo Ones.

3100 - 40mph
3500- 50mph
4000- 59mph
4400 - 63mph

Back to my original statement. If you are looking for TOP speed, get a pair of Mirage Plus props.

Is this GPS? If its not - dont bother till you have GPS.

Are you SURE (very sure) both sets are untouched and not labbed. ....if you didnt buy them new - you cant be sure. Your numbers arent completely indicative of back to back Bravo 24 vs 26 testing on a Mag platform. Seems like you shouldnt sell the 24's just yet. Brett might be able to get them to work with some cup and magic. Also, how much fuel is in it, do all your testing at an average (I like 1/2 tank) I wouldnt run that Mag too hard at 4400 - I cant remember what the revlimiter is 4950 (?)

*Last, you need room to really run it out - about 45 seconds to
1 minute at wide open throttle (or more). Your trim should be in the 5-6 range.

yes all number are GPS, I would not be posting if it was not real speeds.

and I am giving the boat enough time to stretch its legs. Not looing for strickly top end, just a good all around prop, cruse speed included, I do 95% of that 3000-3500 rpms stuff. ha.

If i trim either prop to 5-6 I am spraying water and not pushing it. seams like anyting over 3 is to much. I have not just let it spin them hard maybe thats the trick.

spint he 26s with alot of trim?

I'd still Lab Finish the 26's with added rake angle to respond better to trim.
We can gain 250 rpm and pick up some speed. There really isn't any down side to Labbing the 26's.

Brett

Over 3 is too much! I can run it higher than that with boxes.

you just confused me, over 3 is to much? but you said to trim it to 5-6..

did you mean over 3 is NOT to much?

[QUOTE=mittens;3670779]you just confused me, over 3 is to much? but you said to trim it to 5-6..

did you mean over 3 is NOT to much?[/QUOTE

Yes - you should easily be up to 4-5-6 before you see speed diminish. You meant at WOT right?

Yes at WOT. at cruse 3000-4000 it likes 2ish on the drive and nothing on the tabs.


I will try trimming it out more. just seams if you sprayign water its not going behind you.. but I have not had more than a few WOT runs so I will try it WOT and trimming it more and see what happends.

Gotta run the boat at full trim, get it up and out of the water and drive the balls outta it. Set your tabs at neutral and start slowly trimming till it blows out then just tap the drives down a hair till they grab then if you want play with the tabs a tick up or tick down....1/2 tank, 2 people (or just you) and normal gear how you'd be running. That boat with HO's in it with stock 26's should be in the 4800 RPM just fine. Are you full fuel/water and gear? How are you testing? We set up those boats with LAB 26's all the time and ran great. I have a set of LAB 26's that Brett did for me that didn't work on my application so I sold them to my friend with a 33 OL. They just had a baby and he isn't using them. If you are interested in them you can PM me or email me at [email protected] and I'll put you in touch with him. Keep the 24's as a spare set of props and buy the LAB 26's. Only been run about 1/2 dozen times...and Brett knows the props (not the 28's for those thinking something else) so he has all the correct numbers on them for what he did to them. My .02.

Just thought of this... I know might be a stupid question but are you sure your motors are HO's and don't just have HO cowlings? I do know that Del at Ski Dock (I assume that is where the boat came from origionally) usually ordered 342's with MAGs and not HO's. Just wondering if you checked the stamping on the PCM's.

I can say this nobody has tried more configurations on a 342 than Keith. Listen to what he is telling you because he has tried every set up possible.

Keith when are you coming back up?

RBR whats up man! I need to get back up there for a weekend sometime.

I lived on the lake for 4 years and it was 30 feet low and had 3 speedboats. I leave and now it is always full and you have a poker run and 30 boats that go over 150MPH... Maybe its better that I am gone!

Florida is fun but aint nothin like a Lake Lanier houseboat party tie up! Hope all is well man.

I run with about 1/2 tank and 2-3 people so fars.

Will try running them out of the water more.

And I have stated they are 496 mags...... NOT HOs.

And the boat has gent, vacuflush, and ac... It's not a light 342 haha

Keith come up for the poker run in July

OK let the boat eat for a little while with it trimmed at 6 maybe 7 on the trim, and it got 64-bouncing to 65mph @ 4500 RPMS.

3/4 fuel, fridge full, cooler full, water full. 2 people. i guess thats not TO bad for a fully loadedo ne Genny and all??

If Brett labs them you will probably lose the porpoise and stay at 65 or maybe 66 plus get the engines in the right RPM range. You might get lucky and the props might carry the bow at that trim level.

The speed was bouncing not the boat. boat rides nice and flat. most stable ride i have had.

will the lab lower the cruse speed vs RPM? or will that stay the same too? i like my 40mph 3100 rpm cruse.

Not necessarily, the cupped prop might get more hull out of the water at cruise. It might not net any more or less. The handling will improve though so its worth it either way.