pgolder

Ive got a 311 trs with 525s and 25 mirages spinning them at 5200rpms is like a rocket out of the hole. but id like it to move the power in to speed will propping it work?

bbladesprops

Probably. What are the performance number now (speed @ rpm)?

Brett

pgolder

never had the boat on gps but at ozark shoot out did 80 at 5200 rpm. the vdo gauge tops at 75. but i was told that it could only run in the 70s with these props.

bbladesprops

80 dose look to be a long stretch since it would put you at 2.52% slip if the gear ratio is 1.5. 311's don't run at that slip %. at 13%, you are at 71.4 mph.

Labbing the existing props is a strong option. Since we only need to gain 150-200 rpm, we can tighten up the pitch and cups to decrease any extra slip if it exists.

What we really need is a accurate gps speed and rpm at WOT.

Let us know and we can get more detailed as to whether these props will work or if we should go to some test propellers.

Brett

pgolder

ok thats good info. when i got the boat i was told the the owner (that past away) had 2 sets of props but i got the ones he used on the little lake that he ran it on (fox lake) i was told that the boat ran 80 on the radar at the ozarks but unshore of what to beleave. the drive have bullets and the 25s were labbed but its like a rocket out of the hole lots of power. the dyno sheet 525 with 650 lbs of tourqe with 110. it takes of like a jet ski 92 pump. your opinion can this boat see 80?