Weight versus Speed Outboard Cat
 

Hey Guys, After watching Dales blistering run and working the numbers I wanted to find out how he ran so fast. So I decided to take my boat to the scales and see what it weighs water ready with no fuel. We weighed it today at Supreme Marine on A Frames with 4 independent t scales on the corners. As suspected my boat was 400lbs heavier than his and that was with 465lb each x motors in place of the 505lbs for the 300xs.
Next I used the Bam speed calculator with the data I have and found that it equates for 5mph loss and if you factor in the heat/humidity down here everything falls into place. Also I did not take into consideration our differences in body weight!
Dale and I wanted to know if anyone else has weighed there 28's. If you are serious about your set up you have to. I suspect his boat based on the history of what we know it was built light by design for the orginal owner. I realize that I have some additional weight in batteries, sub woofer inclosure, night vision etc. I believe that is about 125lbs or so. Peter may have saved about 300lbs or so.
Who knows.
If you have not weighed your boat you should do it!
Look forward to any other information you guys may have!

So what was the end result on your total weight or did I miss something.

So what did your boat weigh? Was it 400 lb heavier than Dale's?

125 lb sounds a little light for all the additional equipment you've added (based on your previous posts on your mods), is it possible you've added more than you thought? I ask because I've been surprised in the past how much everything adds up to when I've stripped higher end stereo equipment from cars and boats. All those speakers, enclosures, thick cables, batteries, etc add up fast!

Don't you have hydraulic jack plates as well? If so, those add some pork too.

Boat with no fuel weighed 4380 water ready with props, tool box and everything I normally carry.
Based on Dales info I believe his boat weighed 3850 or so no fuel.
Regarding the rest of the items he and I compared notes and I know what is installed and the 125 in extras is accurate.
I would suspect based on the numbers other 28's have run and what I have additional in my boat that Tabome or Zero would weigh in around 4100 or so?

Hummmmm. That's why I weigh everything, drill holes in the anchors, put helium in the fenders, no stereo. And no one in the back seat if I can help it.��I will get mine weighed Ron. I still think if the weight is in the right place it will not matter to much. As in forward of the CG.

How fast does your boat run now and how much speed do you think the windshield if any scrubs off. Steve.

I will weight my 28 soon. I hope Ron gets my 7610 Garmin soon!! Ha Ha, Ron. NB, I gained 4 MPH when added my windshield, but also got "new" Dewald CNC props of the same dimensions, so who knows if the windshield helped or hurt, but my money is on the windshield added speed, and better handling . DK

Dave, Jim it will be good to weigh the boat.
Steve, speed is a huge variable. It is really hard to compare to numbers and what effects our little windshields have compared to a full wrap around.
Speed, Weight and HP are all directly related no matter where you position it LOL.
Dave my money is on the Dewalds!!!!!
Should have the GPS's by the end of the month. If not we need to hire Dale and go offshore in CA and pick them up on the ships trying to bring cargo!

Hey Tab, What props were you running at what speed before you got the dewalds. Steve

Started my boat on a diet today. Pulled off the wrap.
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Ron, I bet our 28's with windshields have the same frontal area as Lee's wrap-around. Our windshield and "classic deck" hump are close in location and height of Lee's way cool wrap-around WS. This equates to pretty much equal frontal area (speed) and dynamic CG ( handling) of ours. This is only what I can glean from my road racing experience. All chime in!

Maybe but I would think that with the receiver and glass it may weigh more.
Maybe Jim Lee or Boat Customs can chime in on what it weighs.
David, once you weigh the boat and run it with the mods on a similar day we will know a lot and hopefully this will prove what I suspect is the case along with where Jim K and I live down here in the sweat box.

I was running Mercury labbed 15" X 34's , 3 blade -103 and 65 degrees, 320 feet ASL. Best with 13 hours on now is 113 and 90 degrees. Shaun Torrente brought his "older Dewalds" and we did 109 at Tenkiller last spring (with "light weight " guys and 1/3 gas).

Ron, I have the perfect (and correct) answer!! -----------------Just get your ass to Tenkiller and we all will have a great time!! DK

The weight of my 28 on certified agricultural scales was 5,860 boat on the trailer. Trailer without the boat weighed 1,980. I only had 10 gallons of gas in the tanks and the oil tanks were full. The reason I know the exact amount of fuel and oil is that the day I weighed it was the day I brought it home after re-rigging it with the 3.2s. We emptied the tanks of the old 2.5 pre-mix and put 5 gallons a side to run it on the rack at my buddy's shop. We also filled the oil tanks while it was there. So though it may not be an EXACT weight, I'm pretty certain my 28 fully rigged, ready for the water, no fuel/oil would weigh in just under 3,800 #s. Just for reference to similar inboards, my 30 weighed 6,800 #s when it left Skater - fully rigged, with no fuel, no props and no tie bar.

I'm going to drain my tanks, so I should be accurate with Auto racing corner weight scales. Can't weight to see! (no pun intended, yes there was)! Dale, take some time off and come to "God's" country for the , I think now "THE 28 SKATER" fest. My trailer is lighter than yours! DK

If I could tow my 28 behind a 737 I would come to Tenkiller, but I don't think Southwest would do that for me! Being a small business owner, I can't get the time away that it would take to drive there, spend 3-4 days and drive back. That's why I live on the water, I can enjoy my boat every weekend without having to tow it anywhere!

And he means every weekend 12 months a year!! Lol

if I had time and a place to weigh mine I would. I cant seem to find time to get mine put back together. hope to start this weekend. my boat is now 14 years old doing rerig on everthing. Hope to lose a few pounds in the process LOL

Dale, I feel your pain. It is also hard for me to leave my lake. I like the place so much and it easy to just go to my dock, uncover my boat and have a great time... except when it is too cold!!! You have me there with your mild winters. It still would be cool for all us Skater guys to get together.

Dale, where did you weigh yours? Would like to weigh mine also. Logistically tough to weigh, launch and leave boat, then weigh the trailer.
I've talked to Pete on 28 weights and he told me they all weigh about the same and he never did light weight lay up boats. At least not pleasure or race pleasure hulls. Yours seems to be pretty light. Factory spec sheet says hull is 2100 pounds. Don't know if that's bare or with interior.

I have mine almost completely stripped to bare hull. I'll try to get a weight prior to paint.

Dales 15" mids should be a weight savings over the published weight of a 300xs.

Did you include your windsheild in to your accessory weights?

Did dale have props on the boat when weighed?

THE WRAP????? wth?:noevil:

You all kill me LOL! All kidding aside if you are serious about going as fast as you can this is a big deal. I do not care what the builder says a boat weighs only what it weighs the way I take it to the water!
I spoke to Pete years ago and he indicated they would build a lighter boat and the guys from the Mobil one team back in the day also indicated that a few lighter boats were built with a purpose to save weight.
FP, I weighed the new wrap today before it was installed and deducted for the backing paper also!
My windshield does not weight more than 10-15lbs including paint.

My motors didn't drop much weight at all - they weighed 495 #s each after the conversion to 15". There are other 15" mids/transom assemblies/trim pumps you can use that do reduce the weight some, but the route I went didn't save me any weight. Most of the 10 #s I did lose was all in the aluminum DBR flywheel! As for my the day I weighed my 28, I just saw in my notes that the props were NOT on it when I weighed it - I thought they were. Bottom line is still that my 28 weighs in right at 3,800 #s ready for the water with no fuel or oil. I really don't think it's much lighter than an identically rigged 28 of another year, but who knows? If everyone on these boards were able to weigh theirs and we had a list of 28s and what they weighed, maybe we'd know better. But since Ron and I are the only ones that know what ours weigh so far, it's really hard to tell for certain.

Where did you do the weighing? Close to Disco Bay?

Mid Valley Agricultural Services - 5931 Balfour Road, Brentwood. About 10 miles from Discovery Bay launch ramp.

I'd guess that Dale has more talent, sorry...

Jim, / Skaterjim has done more than anyone, I know of on dialing in on 28Skaters, the fastest 28Skater I know of, whats the new top end...128?

You don't have the weight and your probably 50% + less area as well. Not to mention the critical change in CG!

As you've said, you lost no speed with the windshield installed so that says it all.