Well here is the new mini deckover. It weights in at 218 lbs. It is 10 ft 6 inch
long and 6 ft 6 inch wide. This hull was designed after Dick Hoffmann's race
boat that ran over 130 miles per hr and he wasn't flat out. It has a .080
bottom and sides and .040 deck. you must walk on the rivets only are the
deck will bend. We want to see if this hull will create lift like dicks hull did,
with a low HP Motor. Now, I need a customer that wants to own the worlds
fastest mini. :mrgreen: Thanks, Chuck
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_IMG_0019.JPG
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_IMG_0021.JPG

It looks like Scorpy will become a race boat. We are starting a co-op to get it built before March 28 boat show.
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/IMG_0019.JPG
This boat will also go to all the races and will have graphics adds for each owner of the boat. It will be an advertising boat just like a sign or a nascar race car. The current owners are;
Scorpion Airboats Hull
Ned's Fabrication Metal Works
Dynamic Performance Coatings Powder Coat
Extreme V Twins Engine
Lynn's Stitch Shop Seat covers
Stratton Airboat ACC Fuel Tank and Seat
Airboat Pro's LLC Steering Sys, Throttle Sys, Exhaust Sys,
Electrical Sys, All Misc Parts and Labor.

We still need a belt drive, A warp drive prop, and a trailer. I plan on making some more calls tomorrow to try to get some more owners in the add co-op.
This is going to be the worlds fastest mini. Thanks, Chuck

Now we are talking. EVT joins in on the mini. Are we going to see an 80HP Briggs on that Scorpy?

Sheee, don't tell everyone. We want everybody to think it's a lawn mower motor. Wait till you see this boat decked out in race graphics. The Largest Sponsors logos will be on the front deck. I think Extreme V Twins has the lead with Scorpion next. Anyone wanting to promote their business can still come on board.
Thanks, Chuck

I am sure glad Mike and Silk caught on to mini airboats. They have dabbled in the Mud Motor world for a while. I was wondering when they would start to branch out and spread the word about their business. Welcome aboard EVT, and I can't wait to see what that engine can do. I am a SW Louisiana man so there shop is not far.

Are these up for sale for anyone? What's the price? hull & rake only... no rigging necessary.

The hull is $ 3600.00. But this is a race hull. the bottom is only .080 thick. you can't run it on any ground. If you wanted one to run on the ground we would put a .125 bottom and a .063 deck on it. Then it would hold up on ground and still run fast too. I will check on the price of one built that way. I will check on the rake cost also. We want be running a rake on Scorpy.
Thanks, Chuck

Scorpy is loaded up an going to Ned's Fabrication for the metalworks. I can't wait to see it.
http://www.theairboatplace.com/cpg1418/albums/userpics/10012/normal_Scorpy_001.jpg
Chuck

Ned should have the metalworks finished tomorrow. I will get some pictures and try to post them. Then it will go to Dynamic Proformance Coatings for the powder coat. Thanks, Chuck

I tryed to upload more pictures of the metalworks but couldn't get it to work. The metalworks went to Dynamic Performance Coatings in Inverness today to get it's bright red coating. I can't wait to see it.
Thanks, Chuck

Hey Chuck, I just uploaded all three pics of the scorpy you sent all at the same time and it worked fine. Your settings are the same as mine for the gallery.
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy%2520007.jpg

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy%2520012.jpg

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy%2520015.jpg

Yea, thats the one's i emailed. I just can't upload to the gallery. I don't know what it is. I will try it each day and maybe one day it will work like it use to.
Thanks, Chuck

Hey Chuck,

Is Mike about finished with the engine build? I would like to see the finished engine before it goes on the boat. Some close-ups to see what all was put into it.

Yea, I think we will get it this week. Most of the goodies are inside the motor but we will post some pictures anyway. We may get the hull and rigg back tomorrow from powdercoat and painting the hull. If so, i will post some pictures of it too.
Thanks, Chuck

I know the goodies are on the inside. Mike probably has put flat tops, new cam, longer pistons, stronger springs, rockers, and rods. I would like to see the carb set up he chose to use among other small things I can notice about the engine. I have been talking with Faron at American Airboats. We are discussing using a 60HP EVT on their mini for my build. I was going to get one soon but decided to lay it all down on a 2009 F-150 FX4. Probably wont have the funds for the boat this year unless something turns around for me. May pay the truck in full and finance the boat. Undecided right now on the financial stand point.

Mike at EVT (Extreme V Twins) shipped the engine on Wednesday. I hope to get it Monday. We have to have Scorpy running by Thursday to get it to the boat show. We haven't been able to get one of the drive Manufacturers to furnish a drive at this time. If it goes to the show without a drive, I may get with bruce and design my own. We have until April 25 th till the first race. Buster at American Airbrush stepped up to the plate today and picked up the Rudders to do the painting on them. I can't wait to see them. He is one of the best. I think this boat is going to look like a NASCAR race car. Will keep posting thru the weekend.
Thanks, Chuck

I like it.It looks fast siting still. Can't wait to see more pictures.
Bogger

Wow, Rob at Century Drives sent us one of their mini belt drives. It is a cog belt and has a bearing to support the engine shaft. This is the best quality drive i have seen for the mini's. The quality is second to none. Now i have to wait till the engine gets here. Thank You Rob.
Thanks, Chuck

Today we got the metalworks bolted on the hull. Sure looks good. I hope the engine gets here tomorrow. I sent Papee some pictures by email so he could post them for me.I think we have all the parts now except for the Prop. We will try to post pictures each day.
Thanks, Chuck

Any worries about the higher HP on reductions designed for stock HP?

Hey brlcla, The reduction that Century Drives sent us is a cog belt so the belts want slip and it has a bearing to support the crankshaft. I think it may be the only drive that will hold up to 80 HP. Here is pictures of what we done today.
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_3_005.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_3_006.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_3_004.jpg
Thanks, Chuck

Looks like you guys have been busy today Chuck It's looken BaaaaaD.
Good luck with finishing it up. Do you think you will have it ready for the show?
Bogger

We don't have any choice. We have to be ready for the show. We do it every year.
Chuck

Chuck,

Has Mike given you any indication of engine life. Being that hot modded do you feel it may be an engine for the average boat. One that gets used very regularly. Or is it a race engine only. I have talked myself into getting one of Mike's 60HP engines for my boat I will get built by American. Nice having there shop 20 mins from my house. Hopefully soon but money is tight right now.

I fell like they will be fairly dependable. The main thing with any motor is not to run it wide open all the time. Feel the performance every now and then and back off the trottle some. We have 3 customers with the 54 HP Briggs and they haven't had any trouble.
Thanks, Chuck

OH, Mike said he checked the tracking and the motor was in GA and we should get it tomorrow.

We got the EVT engine from Mike today. Sweeeeeeeeet. It came in around 2:30 this afternoon. It is on the boat with the Century Unit bolted on. I tried to upload some more pictures but could not get it to work. I will have to email them to Papee and have him Post them. Thanks, Chuck

full size pics are in the gallery

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_4_006.jpg


http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_4_007.jpg

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_4_008.jpg



Maybe if I could lose 100 lbs Chuck would let me pilot this thing :lol:

Yea Papee, What if all 15 owners want to drive it? I never thought of that. Time Share Airboats. :mrgreen: Tonight we will post a picture of what we got done today. Thanks for posting the pictures and thanks to the miniairboatassoc for paying for the prop hub.
Thanks, Chuck

She's looking good guys! Keep up the good work. I was hoping to make it to the show. I got plenty of time on my hands after February. Thanks to our economy, if you know what I mean. Spent a little time at home and was even able to put a few hours on my rotax. I got a call last friday to go offshore so I'm heading 200 miles out tomorrow. Glad the paychecks will be coming in again , but unfortunately I won't be able to make it to the show now.

Chuck,

What show is this going to? Not to mention a fully blacked out motor looks good. Kinda gives it that "I wonder what he has in that thing" thought.

Friday we are closing at 12:00 noon and going to Dania FL to the Bass Pro Shop where the Broward County Airboat and Halftrack Conservation Assoc. is holding their annual Show on Sat and Sun. We are taking 3 boats. Scorpy. EVOPRO, and Ron's 084. Everyone should try to make this show. There will be over 50 vendors.
I sent Papee 2 more pictures.
Thanks, Chuck

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_4_009.jpg


http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_4_010.jpg

Hey Papee, I just sent you some pictures of the finished Scorpy. We got 3rd place in the race boat class. Now we just have to run it to see how it does. Could you post the pictures for me. Thanks, Chuck

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_5_011.jpg


http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Scorpy_5_016.jpg



http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/Scorpy_6_022.jpg


Any info on the results of the mini class?

Hey chuck,
Scorpy looked realy great at the show, concratulations! I will be at the airboat races in April. I want to find out if we can stay over night there. Quite a long drive you know. I will be checking with the speed site. Chuck I forgot to ask you what is the second pedel on scorpy?
see ya, Bogger

Hey Bogger, The other pedal is the brakes. On airboats that run over 70 mph should have a brake. It is required on all the race boat classes. Wait till you see how it works at the races.
Thanks, Chuck

We ran the EVT Engine for the first time today and made some prop ajustments. We turned it 4730 on static load. It should gain about 200 more rpm's in open water. At 4930 rpm would leave the prop turning 2987. This thing even sounds like a race motor. We hope we get time tomorrow afternoon to put it in the water.
Thanks, Chuck

Brakes on an airboat. I'm looking forward to seeing how that works.

Duane

All,

I had the opportunity to see and hear Scorpy run (still on the trailer) today at Chuck's. SWEET !

Duane

Scorpy has to be fast just look at it.
Job well done Chuck and associates!
Whats your gess on the speed?
Will you be twisting the screw on it at the airboat speed race in April?
I saw they don't have a two cylinder class as far as I could see. So I see there could be some up and comming exciting things happening, with the mini's being produced by some people.
Thanks, Bogger

We hope to find out how fast it will run this afternoon. We haven't fine tuned the bottom so we know we can pick up some more speed when we get that done. I hope it gets up to 60+. The motor sure sounds good. Next week we will take it apart and work the bottom. We still haven't fine sanded the bottom. They don't have a class for it at the races so they told me to write the specs for the class. I think we should call it the Mini Limited. Max cc to be 1000 for 2 cylinder and 750cc for 3 or more cylinders. Any hull OK.
What do you think?
Thanks, Chuck

Hey chuck,

I hope your results are a beautiful as the day turned out. If looks can make it go faster, you have a winner there. Good luck and keep us posted.

John

Well it didn't go good today. As soon as it got on plane, it would quit getting fuel. The new fuel pump had quit working. It gets on plane quick and to start with, it started running out then fell on it's face. Then it got worse. Then I used the sqeeze bulb to bring it back to the ramp. If i get time tomorrow i well put another fuel pump on it and try again. Thanks, Chuck

Since I brought Chuck such good luck on the river this afternoon, I picked up a Lotto ticket.

I figure that I easily picked up $600 worth of education at his expense this afternoon. Thanks Chuck. (I sent you a couple pictures)

Duane

Chuck,
That bites that you had the fuel problems, sorry to here that. But on a brand new setup you bet you can expect some thing to go a stray.
As far as the racining class goes, what really diferentiates between the cylinders and the cubic centameters? I figure cc's are cc's. Does the amont of cylinders really make a diffrence?
Is this to cover the difference between 2 stroke and 4 stroke motors? Please set give me some insite on this, so go I can give you my opinion.
Let the Scorpy put the sting into the Mini class,
thanks, Bogger

New photo of Scorpy

http://www.miniairboatassoc.com/cpg1416/albums/userpics/10001/normal_Used_Mini_s_001.jpg

Wow Papee, I went back to the gallery to get Scorpy and by the time i got back you had posted it. During testing we droped pitch in the prop and noticed no change in RPM's. The carb is too close to the front of the prop and trying to run on light air. We only got an average of 4360 RPM. On static load we had got 4890 rpm. Robert from Extreme V Twins is sending us a forward intake manifold. that should solve the light air problem. We still have to build the mufflers and that will make more power. Our best speed on this test was 48.3 MPH. We still can gain some when we get some bottom jacks put in the hull. We have to get past 60 MPH for the hull to start producing lift. Scorpy will be at the 75 Chrome Shop Friday thru Sunday for the Big Truck Show this weekend. So no test until next week.
Thanks, Chuck

Chuck,

Wow, you moved the seat forward a LOT. Good luck with it, and keep us posted.

Duane

Well we got to install the new intake that Mike and Robert sent me from Extreme V Twins. They sure do nice work. It's a work of art and fit perfect. We had to do a little cutting on the engine covers to fit the new intake.lucky and didn't screw it up. Here are some pictures.
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_014.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_011.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_012.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_013.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_017.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/thumb_Scorpy_s_new_intake_01
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_s_new_intake_019.jpg

We didn't finish until after dark and i had to go eat. I still have to set the pitch on the prop in the morning and drive to fort Meyers for the boat show. We did get the new mag wires on. I sure wanted to run it today but we had too many interuptions. I may get to run it at the show. If so, i will get someone to thak pictures. Thanks, Chuck

Chuck,

I am debating on getting my boat built with an engine from EVT. Instead of going out front with the carb set up it seems easier to me just to maybe fabricate a bracket for a rain hat over the backward facing carb to prevent the prop from sucking air away from the carb. I know I would have issues hitting something and breaking that design with the carb sticking out that far.

Hey bricia, The prop blades by design create light air in front of the blades and the carb intake is setting in this light air. It.s hard to make HP in light air. On the 40 Kohler we had the air filter pointing straight up on top of the engine. We used rubber hose and moved the filter to the front of the cage, about 12 inches and gained another 100 RPM. The way the carb is facing now, we can create the ram air if we want too.
I just finished building the mufflers, so i have to install them and then i can go riding.
Thanks, Chuck

The accelerator pump cam broke, I think i might have damaged it the way i had the throttle post bolted on. Built a new throttle connection bracket today and made a bracket that bolts on to work the accelerator pump. It also changes the throttle ratio to give a longer throttle pedal movement.
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_carb_work_001.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_carb_work_002.jpg
http://www.miniairboatassoc.com/cpg1416/albums/userpics/10004/normal_Scorpy_carb_work_005.jpg
Thanks, Chuck

I ordered a new prop adapter from Arrowprop today. Don will ship it tomorrow. My Century Drive is 75 mm bolt pattern and i want to bolt a wood prop to it that has a 3.5 inch bolt pattern. The adapter is just the reverse of the ones from Arrowprop that the 75 mm prop bolts too. We want to test Scorpy with a 6028 wood prop. I know that is the prop we use on a 35 HP Briggs and turn the motor 3800 RPM with a 1.69 to 1 ratio. Now we want to see if the Stage 3 Briggs will turn the same prop 2900 RPM with a 1.65 to 1 drive. The motor would be turning about 4785 RPM. This will give us another perspective to look at. We will know by this weekend.
Thanks, Chuck

Chuck,

What size piston's does Scorpy's motor have? Did Mike bore that one out for 3.5" pistons or is it only a minor bore over stock?

Hey brlcla, I think the bore is stock, we had talked about not boring the blocks so they would stay under 1000 cc. We have the motor back together with a new cam, just haven't had time to put it back on the boat.
Thanks, Chuck

That gets me curious on to how that motor is more HP than the approximate 70hp we run.... Very curious now... Definately have to call Mike this week sometime.

It was more cam. Too much cam for it to be reliable.
Chuck

dat splains it tall yeh sha.... I'm so ready to get my boat back.... and try out the new stuff

We ran the EVT Engine for the first time today and made some prop ajustments. We turned it 4730 on static load. It should gain about 200 more rpm's in open water. At 4930 rpm would leave the prop turning 2987. This thing even sounds like a race motor. We hope we get time tomorrow afternoon to put it in the water.
Thanks, Chuck
Hey Chuck I would not turn that motor that many rpm's with that stock cast iron flywheel they will explode. I have seen it happen. not a pretty sight. Not trying to be critical just a warning. for your safety and others
Thanks Steve

We seem to get the best performance by putting more pitch in the prop and draging the rpm down to 3900. We are using a 1.65 to 1 drive ratio. More prop speed want make it run faster if you don't have much pitch it the prop. I guess when you fall off the torque curve it want get any better.
Thanks, Chuck

We have the undressed engine back on Scorpy and fired it up today. We will get the exhaust on it and the throttle hooked up in the morning. Then the prop. Then we will be ready for the Airboating Magazine Event this Saturday at Turner Fish Camp. When we test it tomorrow, if it runs too hot, we will install a bigger oil cooler.
[attachment=2:w22db02s]Scorpy Engine 003.jpg[/attachment:w22db02s]
[attachment=1:w22db02s]Scorpy Engine 004.jpg[/attachment:w22db02s]
[attachment=0:w22db02s]Scorpy Engine 005.jpg[/attachment:w22db02s]
We will get a picture of it completed tomorrow.
Thanks, Chuck

Chuck,

Gee, Scorpy's engine looks a lot different with her clothes off. :oops:

That paint scheme looks great. I just hope that it runs as good as it looks. ;thumb;

It may be a little bit louder than it was the last time I heard it run, but hey, it's a RACE boat. ;garfield;

Duane

Watch her close Chuck.... mine ran a little hot... and i didn't watch as close as I should have.... I had a larger oil cooler... went to a finned 8x12 with 4 passes... you may need to go bigger. I will not run my next one w/o the stock cooling fins.

Another recommendation is put a longer hose on the crank case vent and hose it out the back of the boat or your prop will be covered in oil....

I might throw a oil temp gauge in it before we test run it just to be on the safe side

Okay,

I'll ask the stupid question of the day.

Scorpy is a DRAG RACE boat, right?

It'll get started, warmed up a little, get staged, then run as hard as it can, for 400'.

Then it'll run back to the pit area, probably at close to idle speed, and then be shut down for a long time before it needs to do it again.

So why does Scorpy even need an oil cooler? And if it does need one, wouldn't it need a fan cooled oil cooler? The prop won't move enough air to do any real good, except for the few seconds of the race run.

Duane

When we built it, we new they did not have a class for the mini's and they are not holding races now anyway. It's like a billboard sign, to put adds on. So we are going to drive our billboard up and down the river so maybe we do need a bigger oil cooler. We have to show off the Company Names that's on the boat, They are the people that help foot the bill to build the boat.
If we want it to go over a 100 miles per hr, we can put a 2.0 Ecotec LNK 260 HP on it. ;stir;
All we need is a sponsor. ;thumb;
Thanks, Chuck

Chuck,

That makes sense. I keep forgetting that Scorpy is more billboard than race boat. ;rasta;

Maybe one day it'll be a race boat, but for now it's a fast, pretty, ride boat, which is also a billboard. ;thumb;

So, back to the oil cooler question. How does someone determine what size, and style of oil cooler to use? Or if you even NEED one?

What seems obvious is to run the boat, and measure the oil temp, to get a starting point.

I've been planning to put my oil temp sending unit in one of the drain plugs, only because that's how I saw it on Ron's boat. But after thinking about it, it kinda' makes sense to measure the returning oil temp, after it has been through the external line to the filter, the filter itself, and then back through the other external line to the engine. If it's too high, then a cooler is needed, and I guess could be added in either of the external lines.

Today's stupid question is:

Where is the correct place to measure the oil temp? At the bottom of the oil pan, or in the return line, or maybe somewhere else would be better?

I'll save the sizing the oil cooler question for another stupid question of the day. ;garfield;

Thanks,

Duane

David,

I have an oil temp gauge going on with my Generac Motor.... This one is what I am using...

http://shindypro.com/catalog/each_q_ptype.key23.html

I just don't think the prop will pull enough around the block and heads to keep them cool.... but I may easily be wrong.

We like putting the temp sender in the oil pan. If the oil temp gets over 160 degrees, I will shut it down and let it cool. A water temp gauge will work just like an oil temp gauge. The sender don't know what is making it get hot. We plan on putting one on it tomorrow.
Thanks, Chuck

Yea.... they are all 1/8" NPT Brass Thermowells....

We like putting the temp sender in the oil pan. If the oil temp gets over 160 degrees, I will shut it down and let it cool. A water temp gauge will work just like an oil temp gauge. The sender don't know what is making it get hot. We plan on putting one on it tomorrow.
Thanks, Chuck

Chuck,

Yeah, my oil temp gauge is also actually a water temp gauge. ;garfield;

Since that seems to be the way to go, I'll drill and tap one of my oil drain plugs to install the sending unit. I guess it makes sense. The oil pump is picking the oil up from the bottom of the pan after all. After going through the pump, external lines, filter, and cooler (if you have one), you might get a misleading reading if it was measured in the return line. But putting the temp sending unit in the bottom of the oil pan may give a better idea of what the oil's max temp is.

Thanks,

Duane

my temp sensor is d/s of the internal pump on the line going to the external oil cooler..... that way I will have the temp of the hot flowing oil.... really gives you a good idea of how hot you are running....

brlcla,

Darn it all ! ;rasta; That makes sense too.

I'll check to see which is the most difficult to install, and go that way. ;garfield;

Actually, what seems to make the most sense would be to measure the oil temp twice. Once when it's coming out of the engine, and then again after the filter/oil cooler, just before it's going back into the engine. That way you'd know how well the cooler is working.

Nah, I ain't gonna do all that. I'll just do it like Chuck suggested.

Thanks,

Duane

Measuring the hot oil going too the cooler is the one of the most important temps.... I do not care how well my two coolers are cooling I am looking for the hot running temp.... as long as it does not increase at a radical rate i know my cooler is working effectively.... once the motor is warm and running at speed it should almost stabilize at a good run temp... not too hot not too cold.... that tells me i have a good viscosity lubricating everything.... hot temps i am looking for pre-cooler are usually around 180-220F.... that tells me I have at least 140-180F oil hitting the bearings which is a range for a good viscous oil that will lubricate and not rob HP or cause excessive wear....

Where's the video? (Tapping foot). I just want to see how that thing runs on the water. Duane I took my oil cooler off wen I was changing things around and it got broke. I have no problems even with no cooler. I am going to put one back on one of these days. I probably ran 60 miles today with no problem. I only run 3000 rpm though.

well... did it run good or run hot?

I didn't run it this weekend br, we will install a B&M Supercooler this week. We know how hot it can get without proper cooling. Here is a picture of the cooler we are going to use.
[attachment=0:19b8firc]Oil Cooler 003.jpg[/attachment:19b8firc]
Thanks, Chuck