prop 38 fever/ sportmaster -2 ??
 

Starting out with standard height bravo's

1989 38 foutain 1.50 ratio 650hp side by side

What prop ? Have 28 hydro"s 4 blades to try out in spring

Do they sound close to what I might need ?

Thinking of sport masters -2 for upgrade , any one have experance with smilar boat with these drives?

Re: what prop for 38 fever? / sportmaster -2 ??
 

they sound to small... exp with the -2 lowers. but im no expert. it also has a lot to do with cup dia. etc.

Re: what prop for 38 fever? / sportmaster -2 ??
 

did your prop pitch change alot going to the sport master -2?

Re: what prop for 38 fever? / sportmaster -2 ??
 

what speed before sport masters vs after installing them?

Re: what prop for 38 fever? / sportmaster -2 ??
 

I have standard xr (Donzi) in your case im told you can benifit from the shortys. pm Marginmn he did his & had some luck. Bret or Julie should be able to point you in the right direction. i think you need to go up in pitch with the shortys. ( if i was going to GUESS i would say 32p)

Re: what prop for 38 fever? / sportmaster -2 ??
 

Nauti By Nature,

What is the wet weight of your boat?

Julie

Re: what prop for 38 fever? / sportmaster -2 ??
 

You're going to be close with the pros and cons of the sporty's. Those drives really need to run on the surface in excess of 85-90 mph to benefit from them. They also like boats that fly themselves.

Consider getting some base line numbers with the current set up first.

Re: what prop for 38 fever? / sportmaster -2 ??
 

sounds like a plan ! just worried about bravo one's holding up

looking at b-max drives any feedback on these drives ?

ANY B*MAX USERS OUT THERE?

Re: what prop for 38 fever? / sportmaster -2 ??
 

We have a number of customers running the B max drives and they seem to hold up well.

You need to pay attention to the prop shaft, it's made of hardened steel instead of stainless so it will rust. It needs to be greased regularly. I have seen some serious horsepower put through them. They seem to be more reliable than the XR in high horsepower applications.

Matt

Re: prop 38 fever/ sportmaster -2 ??
 

depending on what you spin your motors up to? i think you may be close. or at least be able to get an idea with those.
hydros seem to run bigger.
ask the prop folks!! but from my experince prop testing sure seemed hydro is 1 or 2 sizes bigger with same number..
maybe i am just nuts :drink:
i had bravo 4 blades and could turn bigger wheel but got less speed than hydros.
i had non step 35 with 550 hp could turn the 28 labbed hydros to 5100.
my buddy has a 99 38 step bottom and with 500's he spun 27's

Re: what prop for 38 fever? / sportmaster -2 ??
 

just be kind to it.. ease on plane and u know what to do if you fly the boat,, just be gentle., i got 200 + hrs out of a set of bravos,, i just dont beat the boat and its not a 1/4 mile dragster.. and time exit and reentry with your throttles and they will live,what i would do, when they finally do break,, upgrade.

Re: what prop for 38 fever? / sportmaster -2 ??
 

BMAX definitely has the longevity but lacks slightly to the Bravo in hydrodynamics.

Re: prop 38 fever/ sportmaster -2 ??
 

You are right, Hydros are usually at or above the marked pitch while Merc Bravo style props are usually below the marked pitch. I have seen some of the Merc Bravo style props as much as 3 inches below the marked pitch.

Matt

Re: what prop for 38 fever? / sportmaster -2 ??
 

Thanks for info !