props for a 42 tiger non step
 

boats is closed to bieng finished i will have a strong 750-800 hp what kind of props should i try on a 01 42 nonstep tiger i have imco sc 1.5 drives and stelling boxes. any input would be great thanks in advance

Re: props for a 42 tiger non step
 

I think you would do very well with the Hydromotive P5-X props. Is it twins or triples? What year is the hull? At what RPMis the peak HP produced?


Julie

Re: props for a 42 tiger non step
 

My buddy has close to 700 and runs 32 Bravo I's. Goes 82.2

Re: props for a 42 tiger non step
 

2001 non step twins and at 5400

i was told that 5 blades dont do well on a non step tiger is that true

Re: props for a 42 tiger non step
 

I think you will like the Bravo 1 propellers. There are things to consider though. What are your goals? 5 blades do have their place. if the X is high and cruise of the essence.

Lets get a baseline with some type of propeller first. Let us know if we can help in that regard.

Re: props for a 42 tiger non step
 

I have several clients with 42' Tigers and the 5B propellers have performed well. They simply carry the boat better than the 4B props for overall performance and handling. But lets define your goals and then we can look at the best route to acheive them.

Julie

Re: props for a 42 tiger non step
 

im looking for top speed prop but would still like a decent cruise speed ive done the prop calc at 5400 rpms with a 10% prop slip with a 30 at 90-92mph

Re: props for a 42 tiger non step
 

If you indeed have 10% slip then a 5B propeller will not give you more top end. Remember that you need to reduce one inch of pitch if you are calculating slip on Bravo I propellers. So a 30P Bravo I is really a 29P , which would give you a slip of 8% using 91MPH for top end at 5400 RPM with 1.5 gears. So again the 5B propeller will not increase your top end, but will help your cruise speeds and handling. If your 30P Bravo I props are not Lab Finished then you may consider stepping up in pitch and labbing.

Julie

Re: props for a 42 tiger non step
 

We have found the Bravo 1's to carry these boats very well. For top speed as stated earlier, I think you'll like the Bravo 1's.

Re: props for a 42 tiger non step
 

So I Would Lose 1 Mph Top How Much Gain In Cruise

Re: props for a 42 tiger non step
 

pm otis311 on here the 5 blades made his bow push on the same boat with about the same hp...i'm sticking with the 4 blades, I'll be around 600-625, 2000 straight hull w/ xr's.

Re: props for a 42 tiger non step
 

how fast are you running
and what size props

Re: props for a 42 tiger non step
 

I was at 73 last year, extended covergirl with 500 efi's xrs and half tanks gas. otis got rid of his boat. I have 26 4 blade now. I have talked to Brett about setup and our boats dont need stern lift. you can also pm Craig Barrie, he designed the Tiger and can give you starting points as well. No one I have spoken to has had a bad ride with the 4 blades. GLH has a set of 30 labs for XR, which I think has the same shaft as your imco.

Re: props for a 42 tiger non step
 

Sorry I missed this.

Heard the same thing about Otis's Tiger plowing with the 5 blades, he could not get the rev high enough, my amateur guess is to much stern lift.

My guess is your slip will be way above 10% more like 15-17%. Also with 750HP and a 1.5 ratio you will need all of 32's if not labbed 34's...I would get them from Throttle Up, Julies and Matt have done great work for me.

I have not dynoed but for your information i was out today in 1.5' to2' chop and hit mid 83's on gps with 32" non labbed Bravo 4 blades at around 5250 rpm running a 1.5 ratio Bravo XR's.

Phil Lipshutz has told me and I have observed since then that these boats are very sensitive to weight up front. He mentioned that an extended cover girl costs easily 2 mph and I would agree with that since DPT boats here on the Lake with an extended CG cabine and we compare notes all the time.

He runs 28's currently and is underpropped we saw 77 mph at 5300 rpm / 1.5 XR's last Friday the rig had some left in it and the whole population of Vermont was in the boat with a lot of gas. He will try my 30" labbed and we will see where he ends up. His milled are dynoed at 697 HP at 5600rpm.

If you want the fastest ride possible do not load any weight forward.

My guess if you have 750hp and you find the right props is around 86mph any more than 750 and your 1.5 ratio might not be adequate...

All the speeds mentioned here are GPS and props are 4 blade Bravos.

My humble opinion. :D:D:D

Hope this helps in your informaiton gathering.

Re: props for a 42 tiger non step
 

how much hp do you think you have? glh

Re: props for a 42 tiger non step
 

My guess is around 700 I have not dynoed them.

Stock they were Merc 600SC's

They have been rebuilt to 509ci from 502.
CR went from 7.5 to 8.1
Added Superchillers and pushing about 5.5lbs of boost.

Re: props for a 42 tiger non step
 

I would PM Otis he has a set of props that with our MB700s went 82mph on the gps they were the fastest props we had on the boat we ran some 5 blade hydros and had good performance but some porpusing and we also ran some 4 blade bravos which were awesome but only 77 -78 the props he's got were labed for a race boat and they were the best on the Tiger maybe he's still has them if you're making that power those are the props you need. best of luck

Re: props for a 42 tiger non step
 

Do you have any recollection what they were?

Re: props for a 42 tiger non step
 

GLH, what heads?

Re: props for a 42 tiger non step
 

The ones that came with the 600SC they were redone by our local engine guy and got iconel exhaust valves since it did not come with them stockl.

Re: props for a 42 tiger non step
 

I want to say they were 4 blade bravos but when I tell you they are bad it's an understatement they were bad ass.

Re: props for a 42 tiger non step
 

That is true. I did not like the feeling of the ride it gave. The prop worked well, but did not carry the bow very well. I had to input alot more positive trim to carry it. And as you know, the boat is all bow. I would however, reccomend Julie at Throttle up to fit you with the proper prop selection. Nothing but 1st class servise all the way

Re: props for a 42 tiger non step
 

29" 4 blade Mercury racing props that had been labbed. I have them but need to be converted over to the XR hub for your application. Julie and Matt converted them originaly from XR to XZ for me. We picked up a SOLID 5mph with this application. It was the only set of props that made those engines come alive. What a difference

Re: props for a 42 tiger non step
 

Playboy, I dont want to burst your bubble, but there is know way you will see those kinds of speeds with that HP in a non stepped hull without major hull mods. Laz and Albert did extensive testing and never saw above 82 mph in salt. I did have an ext covergirl Cabin, but like GL said, its only costing 2 mph to have it. Your going to need 900-1000 ponies to see that speed in real life


SORRY

OTIS

Re: props for a 42 tiger non step
 

Playboy, Any new news on props and speed results ??