30' Prop Advice - Need Help.
 

I just bought a 30' with twin 496 HO with xr speeedmaster drives and 29p Hydro Labbed props and I can only get 94mph out of it. I have been told I should be doing 100. The motors turn 5000 on a full tank of gas pretty easily. Does anyone have a similiar set up and go faster? Does anyone have any suggestions on props?

Thanks,

Max

Re: 30' Prop Advice - Need Help.
 

I thought that that boat did 100-103 with 500EFIs. I would be pleased with 94 with the 496HOs.

Re: 30' Prop Advice - Need Help.
 

i run 105-110 with half tanks and two people with 500hp's (carb), i don't think you are to far off with HO's... what is the rpm limit on HO's? i prop mine for 2 people and low fuel, otherwise if you prop with full tanks and many people when you run by yourself and low fuel you will be banging the rev limiter all the time... is that a gps speed? are you using 3 blades? if so, maybe some 4 blade 30's, i think you can turn them with the ho's pretty well... that might get ya 96-97, but i think that is about all you are going to get with 425HP... i have heard some run 2" shorties and that works pretty well, but i haven't tried that myself yet... probably will though...

Re: 30' Prop Advice - Need Help.
 

I am hitting 5000 with a half tank and me and one other person in the boat and a little negative trim. I am running 4 blade labbed 29 hydro's. The rev limit is 4800-5000

Re: 30' Prop Advice - Need Help.
 

i would put some bigger props on it then.... might try some stock 30's first then having them worked..... ask julie or matt at throttle-up, they are on here.... those also have the 5 blades that might work well with our hull....

Re: 30' Prop Advice - Need Help.
 

I saw you run the boat in the keys and you like to run hard! Your boat looked great. Julie and Matt are great to work with. If thier is speed they will find it.


Dan

Re: 30' Prop Advice - Need Help.
 

I just posted a message to you on another thread Pmpaint. I think that that is my old boat. I have a set of 29 Hydromotive P5X's that I bought for that boat just before I traded it. They work much better on that boat!!!! It takes off much better with no blow-out, mid-range is better, but unfortunately top end will be the same. The best speed that that boat has ever seen is 96mph by Jay when he sea trialed it before I picked it up. 94 was about all I ever saw. Let me know if you have an interest in those P5X's. I had them in the classified section months ago, but didn' seem to get any interest. I also have a full cover for the boat, and a second set of complete exhaust tails with CMI mufflers that will bring the boat down to 87db. Good Luck with that boat. Its a sweet Ride!!!

Re: 30' Prop Advice - Need Help.
 

Thanks Dan! Isnt hard the only way?

Chuck - Yes it is you did a good job building it! Did you ever try any other props? I really want to try and get a few more mph even though 94 is pretty fast there are 6 or 7 other motion and Spectres in my area and I gotta be one of the slowest ones! I'm gonna try reg hydro 4 blade 30's there happen to be a set for sale on here now. I had a 30 with 300x prior to this boat so I had a full cover but I will ask around next time I run into some of the others down here. One question how do the pre-lubers work are they automatic or do you have to click he toggle switches next to the kill switch?

I'll post how they work out.

Re: 30' Prop Advice - Need Help.
 

I didn't try any other props. Jay at Spectre thought that the sportmaster lowers would get the boat over 100mph, but I put them on last spring and noticed no increase in speed. Those pre lubers have to have about 80 lbs. of pressure to work. The switch is by the kill switch. Call Master Lube if you have any questions, they are very helpful.

Re: 30' Prop Advice - Need Help.
 

Did you put on the 2" Shorties or regular I cant tell?

Re: 30' Prop Advice - Need Help.
 

i think he had the 2" shorties put on there an it sounds like they are still on there..

Re: 30' Prop Advice - Need Help.
 

Shorties

Re: 30' Prop Advice - Need Help.
 

Try some lab finished 34" Bravo 1's with 5/8" of the diffuser cut off. Run a little positive trim and you will see the # you are looking for.
Good luck!

Re: 30' Prop Advice - Need Help.
 

Finally got out to try the HM 30 pitch props and got another couple mph (96mph) with a full tank of gas and 2 people in the boat. I still think I can get a couple more. Had some rpm left plus running on a full tank.

Max

Re: 30' Prop Advice - Need Help.
 

Got out on the bay again on sunday with a 1/4 tank of gas just me and the wife. She was driving I was throttling we we hit 98 almost 99 hard to tell on the gps gauge. 4 mph with just a prop change!

Back at the dock I some guys were talking about a Cat that flipped (Biscayne Bay) Has anyone heard about that?

Max

Re: 30' Prop Advice - Need Help.
 

good deal...... i see 100 coming for ya...

Re: 30' Prop Advice - Need Help.
 

I ran 34p labbed Bravo Ones with the diffusers cut off on my 30'; since I don't have the boat anymore I would sell them if anyone needs them . I have 32p same setups also available, my new boat has SSM 6's so the props are in storage.

PM if your interested, I don't want to mess up this thread!

Re: 30' Prop Advice - Need Help.
 

How much for the props ?

Re: 30' Prop Advice - Need Help.
 

poffshore, if dave doesn't buy those props, i will....

Sean

Re: 30' Prop Advice - Need Help.
 

Finally got a decent picture:

Re: 30' Prop Advice - Need Help.
 

That is an incredible picture!!!!! Now you need to get it published :drink:

Re: 30' Prop Advice - Need Help.
 

I think you have a new avatar shot!!!!

Re: 30' Prop Advice - Need Help.
 

Max,
Do you have someone near you that can check the pitch on those props? After talking to Julie ant throttle up we either think the tacks on my boat boat are off or those props may be more than 30". When she ran the calculations on what I was running we came up to like 6% slip which can't be correct. I'm thinking it may be my tacks because if I run the calculations assuming you have 1:35 gears that would put you at 98.5 at 5200 at 10% slip.

Also just for your info. I ran a set of lab cut 32 bravos and dropped about 100-200 rpm and speed was about the same. Personally I think I liked the way my boat handled with the hydromotives better.

Re: 30' Prop Advice - Need Help.
 

what do you have for power swede? gears?

Re: 30' Prop Advice - Need Help.
 

Ya next time I take it in to TNT I will have them check it out.

Re: 30' Prop Advice - Need Help.
 

The engines I had dynoed about 550hp without accessories. I have 1:35 gears. 110mph was the best I got. I would say my motors were pretty close to the same power as 500EFIs as Sonny and I alway ran pretty close.

New motors are in the works. Hopefully 650hp+ NA.