35 fountain 02
 

Say you had 750 a side what prop would be the best place to start

I would say a 28 or 30 four blade would be a good place to start. I know with my 500hps the 28 gives me close to the max rpm.

The boat has 500 efi now and runs a 28 I've been told a 30 labbed is what I need but repowering with 500 cubic inch and boost thinking I'm gonna need a little more than that ... The original fountain sheet said 87 mph ...I've never seen above 82 with 4 people and fuel

Fountainboy27,

You will most likely need to go to 32 pitch castings.
When your ready, we can send you new stock 32's through our test program. With those you can get baseline information and determine the route you wish to take.

Thanks,
Brett

I have a set of stock 32 Bravos with stock 525's and put them on the limiters spring and fall, good air and decent water. I would think with 750 a side you would need more, unless you plan to spin them up there.

Our 2001 35 lightning has stock 500 efi's and turns stock 30" bravos to the limiter with cool air, 2' chop, and just me on board. With those conditions it'll do 88-89. But for average conditions and 5 people it'll do 84-86 every time. I would think with 750 a side, 34" bravos atleast or some 32" six or seven blade herings would be needed. Just my two cents.
Philip

We're clocked 96 mph by heli during a poker run ,GPS's 100.1998 35 Fountain, 4 people, half tank, twin 600S/C blowershop blowers Imco Extreme drives , 34P labbed Bravos.

750HP at what rpm? I turned my 32 4blades to the limiters on stock 575scis last year in a 38. However they ran at 5200 rpm most of the summer. I hate to go against Bblades, cause they are great, but I have to agree with the others that 34p is the place to start, unless of course you need to be in the high 5000's to reach your power.

If you have a stock drive I wouldn't run a solid hub or 5-6 blade prop, try to stick with the bravo one 4 blade and have bblades lab it to dial it in.

Boys,

I said test 32's in true stock form to determine where to go next. LOL.
FB27 said................SAY you you have 750 a side. OK..............

When we know more, let me know.

B

Wait, are you saying the customers hp estimates may be onthe high side? That never happens right? :D

LOL, we just don't know do we?

We have all kinds of pitch and models to test. I was just speaking from, well from many other testsss.
We have to start some place.

Thanks 4bus, you're johnny on the spot.

Brett

2002 35' Fountain with 575sci's, intercoolers, and smaller pulleys (apprx. 700/ea.) with 2" shorties on ITS turned 34" Maximus and 36" Bravos (both labbed) to around 5400rpms and a over 100 mph (best of 106mph).

hey brett . rob freeman .you did my 30s this summer . anyway ive purchases some pfaff 750s actual with full dress . for the red boat you put my new 28s on to get me through the 4 hoasemen run we did . we need to get buisy on a set of maxumus props im thinking , please advise time is clicking . motors at riggs now for install thanks rob .you got my number.

Hi Rob,

Oh yes the awesome red paint job on getto boyz!

I'm thinking the 32 pitch casting is the way to go with 500 additional actual HP addition, 30's may be in order though depending on the desired rpm level.

Do you have rpm and speed numbers from either set of 4 blades we can use as a base line. My old records show 4800 and 5000. Those numbers would be more inclined to suggest the 30P 5 blades.

Otherwise, testing with the stock Maximus's is always a starting point.

Brett

im going to need to pull 5800 to 6 k . well get it going ill call ya soon