How fast?? Nordic heat
 

Ok, so im running a 26p 4 blade prob and im only seeing about 64-65mph I could have 8 people or 2 people and it does the same. (this is not a gps speedo)

I have a 2003 heat with a 525 how fast is the thing suppose to go and what prop should I get for the best performance.

Thanks guys and happy boating this summer

Elevation? RPM's?....

A friend of mine owns a 2002 Nordic Heat with a 496 Mag HO which is 100 horsepower LESS than your 525. With a stock 26p Bravo 1 prop he will hit 63-64 gps. With a labbed 26p Bravo 1 he can get to 65 mph.

I agree with JD--what is your elevation?? RPM's now?? Dont trust the drive speedo. Use the GPS in your phone and see what your true speed is. Having 8 people on board should slow you down significantly vs only having 2 people on the boat. Something doesnt sound right.

Personally, I think you should be getting close to 70 mph but need more data.

Definitely check your speed with GPS. My 2003 with a 500EFI, AZ SPM throttle body, 26p stock prop at 700 feet consistently hits 70.6 and on real good day I had seen 72.2. I have a prop being worked on right now and hopefully see more! My spedo normally runs 4 to 5 mph faster than the GPS. Next step I am going to add a 1" drive spacer.

I was running lake mojave which is up above bullhead city, but I am going to try havisu in 2 weeks and see what the heck it does, Im also going to buy a gps speedo

BUt the boat mostly runs in havisu,

The 500 boats should run low 70s
525 boats easily mid 70s
575s high 70 to low 80s
600s low 80s
800s to get to 90s
1000 to get to 100
All these #s have a 5mph + or - variable based on load, weather, altitude, setup, and driving styles.
I think you have a setup/rigging issue, commonly known around here as too high of an x dimension.
The best fix is to determine your x dimension, and if it is high (like 19"s), add a 1" drive space to lock up your propeller better and get more hydrodynamic lift. You should also experiment with propellers. Some of us use 5 blades, some people are still running 4s. The 5 blades offer better plane off, midrange efficiency, and high speed lift and stability.
Good luck and keep us posted with your progress.
Steve

Hey Steve I am interested in a drive spacer. How much does a good one run on price? How do you determine the x dimension on the heats? I am all stock 496 ho, however I am running a 4 blade powertech 25 pitch OFX model prop. I would like more speed low fuel and me alone I can only get it up to 63 mph. I do have some extra weight in there from alout of audio stuff like 175 pounds worth. Had it in there when I made the purchase though. Ive heard about the heats slipping out of the hole a bit as does mine if I get into the trottle to much. Is that normal?

Steve- Thanks for the round about numbers. I am going to enjoy my boat this season, but winter time I am planning on some engine work. Now I know the rough numbers to shoot for to get me over 80 :) Time for some compression, some cubes and a little tuning :)

All of the spacers I have seen run around the same price as seen here. I have seen some people hawking 1" spacers on this site for 200-250, but rarely do they pop up.

http://www.cpperformance.com/p-16392...e-spacers.aspx

Steve, what size/manufacturer 5 blade prop for '03 Heat 500EFI? don't want to waste a lot of time/money experimenting if others already have. My above post is what is in my boat. Thanks!

The exception being the 710 Ilmor boat that I got going 91 mph in perfact conditions...it pretty regularly does over 85.

But it was lighter than a big block boat also.

Chris

They will slip coming on to plane with a 4 blade and a high XD. Most of my friends here with 502 Mags and 496 Mag HOs run 26" Bravo 4 blades. They do work better with a 1" spacer. It may also help to have some cup added to your propeller if the slip % is still high. Most of the aftermarket guys like Imco make spacers in varying heights. I would look at Teague's website. The guy we used to source a lot of stuff through is out of business, unfortunately.......
X dimension is the vertical distance from your input shaft to the bottom of the hull, or pad on our boats. To measure it, measure from the center of your trim sender housing on the side of the drive to the bottom of the pad. You'll need to use a straight edge on the pad, sticking out behind the transom. It is not measured along the transom angle. You'll probably measure 18" to 19"s.

Most of us like and use the Hydromotive P5-X.
For a 500EFI boat, a 25" or 26" pitch should be close. They have an exchange program to get you the size you need.
I think Brett at BBlades also carries these now.
You may be able to find one in the OSO prop section too.
I would call hydromotive and Brett. They should have a good database for our boats (as to prop model and pitch).
www.hydromotive.com

Thanks Steve for the reply, the prop I have now already has extra cup in it. I just went and measured my XD, It measures 19 inches center of trim pod to bottem pad. Is that a good running number for a heat? What will a 1 inch drive spacer do for my boat?? Go faster, not slip as much out of the hole, etc? If I get a drive spacer will I need to change my prop? Sorry for all the questions! Thanks Garret

No problem Garret, we are always happy to help our Nordic brothers. If you run well, you'll enjoy your boat more, and you'll make the rest of us look better too. 19"s is way high for your motor and setup. Mine is 19.25"s, now lowered to 18.25"s. The 1" spacer will improve everything you are currently experiencing. You'll have less slip coming on plane and in the midrange, you'll have better top end #s, and better lift. It could be worse. A lot of guys have to buy shorties which are expensive, and we only have to buy spacers, which are fairly inexpensive. Your prop may turn 100 or so less RPM, but the slip %s will go down too, improving your overall #s at any RPM.
Regards,
Steve

Thanks alout Steve one more question, is a 1 inch spacer what I need or should I go 1.5?

Thanks Steve. I hope to have the prop back that I sent out earlier this year and try it, I think the next step is going to be the spacer. The measurement I came up with is 19 1/8. I will give Brett a call and see what we can do. I hope to get it close to 75mph, gotta try to catch my brother's Warlock!
Kevin

@ 19 1/8"s, you definitely need the 1" spacer. We'll take the Warlock down.....

Good question. It's possible you may need to go a little deeper with the Mag motor.
I would call Imco and Nordic and see if either of them have done this. I haven't done this exact modification to your engine/hull combination, and it's not an exact science. If you plan to keep the 4 blade, and I would with the Mag, 1.5" may be better.
The issue is, would the extra propeller lockup of the 1.5" spacer offset the additional hydrodynamic drag created by the lower XD? Is your boat an MCOB or closed deck? The MCOBs seem to need a little more lift, so that may help you decide.
Steve

Has anyone tried a left hand prop on a heat? I know it makes a difference on 27-29 Fountains.

Fountain did run a few left hand set ups in the 90s. I have 2 friends with good running 29's, and they are both right hand drive boats. One has a 525/Whipple, the other is lightly modified 575.
I think Chris did run a left hand prop as a test. Can't remember the results. With a right hand driver station on our boats, it is going to ride low on the right with one person and a left hand propeller.

don't know if the rage will benefit or not but after reading this i measured my x and came up with 17, its tough to get an accurate reading because of the trailer, i've never experienced blow out coming out of the hole and my boat likes alittle positive trim, just thinking out loud, btw i can't be beat by kevins brothers warlock either!!!

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wtf?

Give him a break.... it's his first post. Learning curve

Hey Steve

thanks for all the great help guys I will take some measurments today and let you no

so in lake mojave at about 650 elevation i hit about 71mph non gps on the 26p prop gonna try a labbed 28p next to see how the heck it does,

I've been running a 30P 4 blade with a 1.5 spacer and -1 imco lower. Works good not great, torques the boat over pretty hard.

I've since removed the spacer, and just running the -1 lower with a 5 blade 29 hering. Works better, still chine walk but better numbers. Even though I raised it up, the 5 blade makes up for the extra slip.

My prop hub runs 'about' 3ish" below the hull of the boat via straight edge. Little bit of gorilla math involved since I run an extension box.

I'm going to try a -2 in the spring.

http://i47.photobucket.com/albums/f1...psfdc7a436.jpg

Great idea!

I am running at 2" below with a Bravo...and 1.5" below with a Maximus.

Boat is running 103 with a full SCX drive.

Chris

Ok so finally ran the boat in Havisu, without gps I was hitting 71mph with 4 big guys and almost 2 tanks of fuel

Nice looking setup Launchpad.........
Regards,
Steve

Thanks! That picture is a sad reality of me not being on the lake any more with a lift in front of my living room. Full on trailer status this summer, ugh.

-2 numbers should be coming shortly.

That sounds about right.