28 heat 525efi how fast
 

can anybody with a 28 heat tell me how fast on gps they will run with a stock 525efi ? also what rpm, what prop and elevation are you running ?

The fastest 525 heat went 81mph with a lot of tweeking and a 1.36 gear ratio.

Typically, they do low to mid 70's

Chris

I just swapped a 496 to a 525 in a 2005 open bow Heat. Speed was 72 at 5200 running a labbed 26" Bravo 1. That was at 1000' elevation and 100+ degree air temp, smooth water. Later testing in cooler weather he saw 75 on the mississippi river.

I am the owner of the Boat Bob`s talking about .....I just got the Motor put in and right now I need to get my Prop redone I am only getting 4950 to 5000 RPM out of it ...I do think ones i get it propped correct I should have no problem seeing 75MPH all day long.....

And when I say get your 28 with the 525 and not the 496 HO trust me on this.....Mine came with the HO and it was a 62MPH Boat then I did some upgrades to get some more speed until this past summer when it took a **** on me ....I now have the 525 and am happy

Got my 525 and XR Sportmaster setting in my shop for my 06 O/B 28. It has a 496 HO now. The only thing I'm waiting on is that i'm not sure about the exhaust. The 525 has headers on it. Any suggestions on getting it out to the corners.

Derek

boatingbent is that a labbed 26 b1 that is getting 4900-5000 or something else? what elevation are you at?

derek give nordic a call there tale pipes for a 28 with a 525 should work

If someone would be kind enough to post their email address, I will send a video of my tach/speedo running at 81-82 mph. I don't know how to post a video. I have tried many times but I can't get it to work. Maybe someone here knows how. Or I'll just send it to anyone who wants to see it.

Ray
My e-mail is if you want to e-mail me first and then I'll send to you if you don't want to post your e-mail.

Ray,

What do you mostly contribute your awsome speed numbers to? ... regarding the setup of your boat.

Chris

Its a 26 B1 4 Blade right outta the box....That 525 should be running at 5200/5250 RPM....I run it on the Mississippi river which is about 1000 feet

chris
how fast was your wood free 28 heat when the 600 was bone stock and the b1 props and at what elevation

Chris, we discussed Ray's number quite a bit a few years ago. Here's my thoughts on why they are so good compared to what we are seeing.

First he's at sea level and cool air. My calculations show about a 50 HP gain for these conditions, compared to here. Second it's salt water. I don't really know how much that helps, but some. Third is I believe the water he runs in is quite a bit choppier than what we see. Take a look at the water in his avatar pic. All of my testing is on absolute glass water. Of course the last is he's done a LOT of testing and set up work to get there. I've seen conditions easily affect speed by 4-5 mph.

Chris

Not sure why my Heat runs so well but keep in mind that I have the ITS setback. I'm not sure if that contributes to the boats top end. Before I switched the gears from the 1.50 to the 1.36 I was running a B! 28 pitch at 78 mph. It appears that the Heats running at higher elevations and on Lakes can only run 26's with the 1.50 ratio. The salt water is definately more choppy than the lakes that most of you guys are running on and I do believe that it frees the hull a great deal. When the water here is glassy it does not run as well. I find myself over trimming to squeeze out some more and never get it. When the water is choppy, the boat runs best. Also alot of the Nordic guys swear by the Hydromotive P5X's. I don't particularly care for them. I feel as if it make the stern run high and causes the boat to chine walk when I come off the throtttle from a full speed run. I gave up on having that prop worked for top speed. But I do like the way it carries the boat with a load and at cruise speeds.

Finally figured out how to do video. (I had to ask my 10 year old)
Here ya go.
Not exacty Big screen quality. I was holding the camera and driving at the same time. I wonder if there is a law against filming and driving? Kinda like cell phones and driving.

Just for comparison: at 1.03 in the vid the Garman 182 gps is reading 51.7 knots and the speedo is reading 59-60. If you do calculation of 51.7 x 1.15 = 59.45. So the livorsi speedo and the garman are pretty accurate according to the formula of 1 knot = 1.15 mph.



[YOUTUBE]http://www.youtube.com/watch?v=OSDlHO93DTM[/YOUTUBE]

Sport,

2009 Wood-free, open bow, Heat.. best speed with a B1 prop was 82.1 mph.. one inch spacer... merc labbed 28 .. at sea level, on Lake Washington. The locals call this Lake Washing Machine, because of the continuing multi-directional 2-3 ft chop.

When the boat was in this state of tune... I got my best speed with a Hering 27x15 at 84.1 mph.

Ray is correct... I get my best speeds on wind blown chop.

Chris

Thanks Bob and Ray

Chris

What an amazing difference in speed between my old 496HO Heat and yours, that's 82 GPS? I could get 62 in the summer heat and humidity, anything above that was in better conditions. 67 and change was my best...that was downhill LOL!! Tried all the props and it didn't matter.

I thought he had a 525?

525 & GPS speedo