What Pitch...Quad4 OT

[white03]

Hey guys

Think I'm going to get a QuadIV OT and looking for advice on pitch.

I have an XB2003 with a 280, normal Alli setback and 20" shaft, commercial ECU. Use my Alli primarily to fish. So with a normal fishing load, not real heavy and not real light, what pitch are you running succesfully??

thank you

Bill

 

[TBuck2003]

26 if you are not looking to squeeze every last drop out of it. 27 if you like life on the edge...lol




TBuck

 

[white03]

Used to run a 26 Trophy but have also run a 28 Hoss very well. then again 28 Spinelli was a dooooggggggggggg out of the hole and couldn't get RPMs up over 7000. That's the delima, pitch is only relative to the make and model of the props. Vary make/model and you'll use different pitch.

So you think 28 is too much then Todd? ok thanx :smile you make em and I value that opinion:at the bar

Anyone else running this setup want to give an opinion?????

Bill

 

[catfish123]

It depends a lot on how fast do you want to go and how quickly do you want to get there. What is your limiter? Is it 7700rpm's? I have the same set-up as you except I have an 8200 limiter. I have run and own both 27 and 28 OT. Both run well according to my standards.

 

[TBuck2003]

Catfish,
Thanks for the reply but what you left out is you have a modified pad lip and you run 1.5" or so above the pad. With a stock lip and lets just say even with the pad a 28 is too much pitch. White if you only turned a 28 @ 7000 there is your answer right there. The four blade OT bites hard and properly set up you will see 5-8% slip...


TBuck

 

[catfish123]

My son Matt with a 225X/XB2003 with stock lip turns the 28 OT into his 6850 limiter without issue at 92.5-93mph. As Todd has stated though.........a 26 or 27 would be the better choice although ALL his props work great!

 

[white03]

I don't have any lip either, so how does that effect lip??

Commercial ECU...what's that 7500 or 7700 RPMs right.

 

[xb03fs]

They definatly bite well, sometimes I wish my 27 was a 26 as I run right 82 to 85 depending upon load with a 200 EFI at 6000 to 6400 rpms...I am adding and SVS and plan on having the 1/8" vent holes changed to PVS vent holes at some point however so I am sticking with the 27.

 

[TBuck2003]

I don't have any lip either, so how does that effect lip??

Commercial ECU...what's that 7500 or 7700 RPMs right.

Bill,
7750 is the stock limiter. What is your exact motor height ??? Still thinking 26,27. If you are not happy with RPM's I will swap it out for the next size up or down. No worries Bill.


TBuck

 

[white03]

I have the hydralic plate set so at the top of it's travel the motor is even to 1/4" above the pad. Always heard and read that the XB2003 runs best even with the pad, so I set the hydralic plate up as stated above, that way I could not get the motor excessively high.

I normally run in the 6000-7000 range. I know this may be blasphomy here and this is just my 2 cents opinion, but hauling *** at 7750 RPMS all the time puts too much wear and tear on a motor. I know I'm fast and if anyone wants to challenge that then I'll run em, but I tend to putt-putt around 90% of the time trying to keep the motor together longer. Of course putt-putting in a Allison at 6000-7000 RPMs is still still faster than most boats!!!!!!!!:beer:

I'm thinking same as you Todd, 26 or 27, leaning toward 27 though. I'll call ya when I get back in the country.

Bill

 

[TBuck2003]

10-4 Bill


TBuck