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missing speed and handling

denis leblanc said:
Very good example here!! this is why you have to try different props and if you get to run your starflite 21ft. in the 80mph you will be one of the first to do it
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All due respect Denis but he would definitely not be the first Flite running those speeds.

Bblades does a prop exchange program and a lot of people say good things about them.

John
 
atc250r said:
All due respect Denis but he would definitely not be the first Flite running those speeds.

Bblades does a prop exchange program and a lot of people say good things about them.

John
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Thanks John I know these Flite can run in the 80 plus its just in my area no one wanted to take the time and money to run them at that speed to them 70mph was all good
 
Back in the day there were some with 300 V-8 OMC's that ran upwards of 80 and from what I read on here they are pretty stable at those speeds for a boat that was probably never intended to run that fast. Unfortunately it isn't the most efficient hull for high speed running but it does do very well in some pretty heavy chop for a relatively small boat.

If the set up is right then the driver doesn't have to be crazy. ;)

John
 
Thats the prob, no one around here stocks any good props. You would think living here with a big river and lake Michigan at my door step it would be props galore plus a ton of inland lakes. BTW it steers with one finger in neutral. I talked to a guy that has same prop, motor, boat,set back, but a torque master and he gps 82 to 85 mph. I could have left my 200 on it and got dam near the same speed. :pissed: I wonder how much difference there is between the prop i have and a 25p 4B trophy?
 
Nick
You are just set up wrong. It can be fixed.
The 27p prop is way too stiff for that setup. I am surprised you are getting even 5300 rpm. If you have 1.62 gears you are also seeing 17% slip. Way too high. If I had to guess, you are trimming the motor right up to get more rpm giving you massive slip and making it unstable at speed. Your holeshot must be brutal.

If you really have a 1.62 gear case you should be running a 23p prop at most. Trophy is a good bet for these hulls. 2.5"-3" below the V and you should be good for 75 MPH.

I have a 250 Etec and run a 25p Rev4. Good for 74 mph. I would think the 250xs should be faster.
 
One other thing. The hydromotive 4B although a great prop is probably made for a high speed bass boat like a Bullet. They have numbers stamped on them as well as the model. If you phone the factory they will tell you what configuration it is. The Quad IV X O/B which is made for outboards came in 3 styles. http://www.hydromotive.com/int_quad4X_OB.html Most often they are class A or B and are made for surfacing situations and very light hulls. Unless it is a class C it will be a dog on a Starflite. Aside from being too much pitch you, are fighting against that prop instead of it working for you.
 
Mark said:
Nick
You are just set up wrong. It can be fixed.
The 27p prop is way too stiff for that setup. I am surprised you are getting even 5300 rpm. If you have 1.62 gears you are also seeing 17% slip. Way too high. If I had to guess, you are trimming the motor right up to get more rpm giving you massive slip and making it unstable at speed. Your holeshot must be brutal.

If you really have a 1.62 gear case you should be running a 23p prop at most. Trophy is a good bet for these hulls. 2.5"-3" below the V and you should be good for 75 MPH.

I have a 250 Etec and run a 25p Rev4. Good for 74 mph. I would think the 250xs should be faster.
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Yes Mark you are wright thats what I said before Nick you have to start with a low pitch prop with that gear ratio and work your wat up and make sure you keep the rpm up (6000 - 6300)
 
atc250r said:
Back in the day there were some with 300 V-8 OMC's that ran upwards of 80 and from what I read on here they are pretty stable at those speeds for a boat that was probably never intended to run that fast. Unfortunately it isn't the most efficient hull for high speed running but it does do very well in some pretty heavy chop for a relatively small boat.

If the set up is right then the driver doesn't have to be crazy. ;)

John
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I know they ran realy good with the V-8 because the motor is heavy and it was easier to get the bow up with the proper prop and engine thorque is a lot more so you were able to run a prop with more cup
 
Nick there is a big diff. in prop the one you have the 27p is made to run on a boat with a pad (hydrostream) so running that 25p will be a good start. You said that you know someone with same boat,set-back,prop,motor and he does 80-85mph does is steering hard also can he turn right and left to drive through a chine? is he running same gear ratio? You see the more you trim to get the prop to spin at 5300 the boat runs like a snake because you are running out of bite on the prop you must have a high rooster tail ? and that tells you that you are trim too much at top speed the tail should be the height of the motor

gees too bad I am not close to you I would love to set it up with you:brickwall:
 
Yeah its a pretty neat sight behind the boat, but if i trim the motor down so the rooster tail is bout the height of the motor i lose speed cause more boat is in the water. I found a 24p 4B Trophy Plus in wisconsin for 450.00 new. I should get it but i wish it was a 25p but if i dont like it i guess i could resell it. I think thats gonna be my next step so i can see how the boat reacts and then ill let u know. BTW where in Ontario are you, i go to Chapleau several time a year. (its straight north of the Sault St. Marie)
 
nickhedstrom said:
Would like to try a 25p or 26p 4B Trophy if i could get my hands on one.
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I have a nice 26p trophy I'm looking to sell. It's not the plus - so you can't use standard vent hole plugs but it also has thinner blades than the plus and is supposed to be a little faster. Nice prop - worked well on the starliner with a light load but the 24 p was better all around with my 225.

Hey that's another thing - my boat never ran well with a 3 or even 5 blade prop. Trophys were the only thing it liked. A rev 4 might be good too.

Anyhow PM me if you're interested - I live near brighton.
 
atc250r said:
Back in the day there were some with 300 V-8 OMC's that ran upwards of 80 and from what I read on here they are pretty stable at those speeds for a boat that was probably never intended to run that fast. Unfortunately it isn't the most efficient hull for high speed running but it does do very well in some pretty heavy chop for a relatively small boat.

If the set up is right then the driver doesn't have to be crazy. ;)

John
Click to expand...

That's Robz boat Starflite you're talking about. http://checkmate-boats.com/forums/showthread.php?t=11429

http://checkmate-boats.com/forums/showthread.php?t=12370
 
Nick,

If you're going to buy new I would suggest checking out blades site. Their prices are competitive and their prop trying program can't be beat.

John
 
nickhedstrom said:
I have my choice of a 24p or 25p 4b trophy plus new. With what ive said what one should i start with?
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I think you are crazy to buy a new prop before you have figured out where you should be pitched. I would try any prop I could get my hands on to get closer to my optimal RPM and then go from there.

Stiffer prop does not mean faster boat. The right prop means faster boat.

A 25p Trophy could make 5600-5700 RPM, a 24p 5750 - 5800, a 23p 5900-5950. Best guesses. If you have a 1.62 LU (I would verify that fact) then the 23 would be my choice.

I always prop my boats for max RPM. Better holeshot, better handling, better load carrying... usually just as fast.
 
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