Tomshep

Hello All.
Am new to this site but am sure some of you can help.
Baja 29 outlaw running Twin 350 mag mpi. (300hp each)
I am only getting 4100 Rpm with current props.

24 Bravo 1 4000 Rpm, really fast off mark no cavitation really happy but 60 Gps

25 mirarge had 4100 63mph gps very slow off mark and lots of cavitation.

I need engines to rev to 5200 there not as you can see. I have had engines plugged in and they have only been to +5200 for 3 mins must be when jumping.
I was thinking buy a set of bravo 1 22 pitch but want some advice before i buy another set of props.
What do you all think.
Thank you.

HOSSMAN

If I remember correctly (brain is a lil foggy from back then) the small block boats had Mirage 3 blades with 21's on them. Your operating range should be 46-4800 with those motors if stock... What year is it? Post 454 they went to a 6.2 small block....

obnoxus

22's wont do it either.

Id borrow/rent a set of 20's first.

Tomshep

Hi The boat is a 2001. it did have 454 engines but they blew so the last owner put in 2006 350 mags. Personaly i would have put 496HO in but hey ho.
CAn you ger a 20 pitch 4 blade prop?
Yeah I need to borrow idealy.
Am in england. I have put on the sites here though so have to wait and see.

Knot 4 Me

The 350 MAG MPI used to be listed at 4,600 - 5,000 RPM but at some point Merc upped that to 4,800 - 5,200 RPM. Not sure what year they made the change. I had a 2000 350 MAG and it was max 5,000 RPM.

fleg1

Almost sounds like 19p Mirages to me!!!!!

Tomshep

really that small? I think I would get a lot of spin or cavitation thoush as there only 3 blades. when the 25 mirarges were on it would take a wile to get up on the plane and also if i backed off and put throttles down again it just reved up.
I was on the mercury prop calculater last night. it also came up with mirages and rev 4 and Vensura
about the 19-21 mark.
Anyone used Vesura props before? Any good??

rumrunner29

No, you won't have a lot of spin with the lower pitch 3-blade...the reason the 25s took so long to plane is because you were WAY over-propped...my 29 with twin 454s (330hp) would be slightly over propped with 25s...my previous boat was a older 30 scarab and was over-propped when I bought it....I put a set of 19 pitch Rev-4 props on it and it was way better...I would think these would probably work well for your boat too....the the mirage prop might be a touch faster though...

Knot 4 Me

Call Brett at BBlades and he can steer you in the right direction. He also has a prop test program. He frequents the Prop Talk forum so you could also post your questions there.