Whipple
 

OK Guys, Here is the initial test results. The only prop I tested was a B1 32" that came with the 525 engine package when I bought it a year or so ago. It came off a 35 Fountain. It has some surface rust and 2 of the blades have some rash and nicks on the leading Edge. The boat did impress me out of the hole and in the midrange. It came up on plane VERY quick and was a rocket to 70!! The midrange torque was AWESOME!! It seemed like it went from cruising 30mph to 70mph in an instant!! Very pleased everywhere except the top...

RPM - MPH
3000 - 39
3500 - 49
4000 - 55
4500 - 65
5200 - 77

I figured prop slip at about 26-27%... What do you guys think? Where do we go now? The prop held the water Extemely well and didnt blow out anywhere. (which I was surprised about)

Ned, I would love to buy your p5x if it will work as an all around, haul the family-wakeboard-and cruise prop when it's 100 degrees outside and 5-6 people on board...

Elevation 650
80 degrees
10-12" Chop

Gonna borrow a B1 30 from a friend to try on monday or tuesday.

Thanks, Derek :drink:

Derek,
Your boat doesn't like that prop. Too much pitch (your RPMs are low), and obviously way too much slip. The 29" P5-X should raise your RPMs and cut the slip in half. More boost comes with more RPM, and more HP comes with with more boost. I would try to turn your motor just under the limiter (I think 5600, set by Whipple in the ECU) with a light load, 5500 to 5550. Picking up 200/250 RPM could give you another pound
of boost.
If you think your boat is quick now with the 4 blade, wait till you run the 5. Just remember to (try anyway :grinser010:) go easy on your XR.
Regards,
Steve

Hey Steve, How much will the 29 p5x raise the rpm from the 32? Is it more like a 30" prop? or should I try a 30 p5x? I can't imagine the boat being any faster to 70!! I'm pumped!! Hope the XR Holds!! LOL

Derek

The p5x that Ned has ....has been balanced and labbed by Hering specificically for a Nordic Heat...the prop used to be mine...but is too small for my current horsepower.

It should spin aproximately 300- 400 rpm more than a standard 32 bravo...and should put you exactly where you want to be rpm wise.

Chris

Call Ned and all your dreams will come true...............
Steve

Steve, that may be a bit optimistic but I still have the prop. Haha

-Ned

Well, The prop should be on the way tomm..... THANKS NED!!

Derek :evilb:

Yep, its all boxed up and will go out tomorrow

So how did you like the new prop ???????????????????

Inquiring minds....want to know. :lolhit:

Chris