Search found 32 matches

by Dr.Dan
Sat Jan 14, 2017 11:16 am
Forum: Airboat Tech
Topic: Polymer bending
Replies: 10
Views: 1817

Re: Polymer bending

I applied poly in a relatively cold garage (direct hot sun would've been nice but I had no choice). I was able to bend 3/8 poly around 4" radius chines with great contact. Bending up the bow was easy. I used lots of clamps, straps, and heat. I used a propane tiger torch to keep the poly hot. Very ho...
by Dr.Dan
Sat Dec 24, 2016 10:38 pm
Forum: Automotive Power Only
Topic: Having trouble starting in cold weather
Replies: 17
Views: 2139

Re: Having trouble starting in cold weather

It's very simple. Use a properly adjusted choke to start a carb in cold weather.

The OP has the option of either adding a choke or just tolerating it until the engine warms up.

Whether it's worth adding a choke just depends on how often you run in the cold.

dd
by Dr.Dan
Tue Apr 26, 2016 12:21 am
Forum: Airboat Tech
Topic: Caddy Engine (500), Recommended Hull Size-DD?
Replies: 39
Views: 3465

Re: Caddy Engine (500), Recommended Hull Size-DD?

When you agreed to buy it for $300, didn't you think it was a 500? In my opinion the fact that it is a 425 is a real game-changer. It is an inferior engine. I do not think it is worth $300 and I think it is a poor choice to start a build. If I was you I'd talk to the guy again and discuss how it was...
by Dr.Dan
Sat Feb 13, 2016 10:50 am
Forum: Automotive Power Only
Topic: Turbo MOTOR Performance
Replies: 18
Views: 3857

Re: Turbo MOTOR Performance

Lots of GT45 variants out there! What are you doing for a computer? I was debating over a BorgWarner s475 as a single ( and can be purchased for $650 and up) or s366's for twins ( $550 and up) but these are well made.....and offer room to grow later in the form of billet wheels and race covers.... ...
by Dr.Dan
Sat Jan 30, 2016 12:45 pm
Forum: Airboat Talk
Topic: vinage canadian airboats
Replies: 17
Views: 2621

Re: vinage canadian airboats

Cool video!

dd
by Dr.Dan
Thu Jan 21, 2016 9:52 pm
Forum: Automotive Power Only
Topic: Turbo MOTOR Performance
Replies: 18
Views: 3857

Re: Turbo MOTOR Performance

I can't really answer your question, but I am about halfway through a similar build. It's a 16' high sided river boat similar to alaskan type airboats. I have a 5.3 ls that will have a gt45 turbo. I'm going to turn up the boost until it spins a 3 blade whirlwind superwide. We'll see how it runs when...
by Dr.Dan
Sat Jan 02, 2016 1:24 pm
Forum: Airboat Tech
Topic: Poly Install.........Screws,Rivets, or Bolts?
Replies: 17
Views: 4062

Re: Poly Install.........Screws,Rivets, or Bolts?

I enjoyed the video. It looks like a nice build. I'm in the process of building my first airboat right now. I haven't got the poly on yet so take all this with a grain of salt: My plan is rivets. I have used rivets for other aluminum fabrication things in the past. Once you do a few, rivets are real...
by Dr.Dan
Thu Dec 10, 2015 11:18 pm
Forum: Airboat Talk
Topic: Dealer for stinger gearbox
Replies: 5
Views: 1342

Re: Dealer for stinger gearbox

Just to follow-up on this.

I ended up ordering a ballistic gearbox (and actually a prop too) from Shane at Dynamarine.

I'm happy with the service, communication, and product. They will receive my future business and recommendation.

Cheers,

dd
by Dr.Dan
Fri Oct 09, 2015 10:08 pm
Forum: Airboat Talk
Topic: Dealer for stinger gearbox
Replies: 5
Views: 1342

Re: Dealer for stinger gearbox

What email did you use for Ballistic? Let me know what you need and I'll get it squared away for you! Only bad thing about email sometimes is it may go to spam/junk folder and the receiver won't ever see it PM sent, thanks. For ballistic, last week I sent an email to sales@ballisticdrives.com. I've...
by Dr.Dan
Fri Oct 09, 2015 9:14 pm
Forum: Airboat Talk
Topic: Dealer for stinger gearbox
Replies: 5
Views: 1342

Dealer for stinger gearbox

Hello, I'm looking for a dealer to sell me a new stinger 2.55. I've seen the dealers listed on the stinger website and emailed several of them. I have not received a single reply. I've also emailed ballistic about a 2.5 and no reply there too. The catch is probably that I've requested a shipping quo...
by Dr.Dan
Sun Oct 04, 2015 10:48 pm
Forum: Automotive Power Only
Topic: 327 with a 3.55 stroke
Replies: 15
Views: 1525

Re: 327 with a 3.55 stroke

How did you measure the stroke? Piston travel in bore? Did you account for the piston to deck height?

3.48 is certainly a million times more common.

dd
by Dr.Dan
Sat Oct 03, 2015 11:22 pm
Forum: Automotive Power Only
Topic: Power to weight
Replies: 5
Views: 1096

Re: Power to weight

But to actually answer your question... The boat I'm building is a 8.5x16' high sided cold weather/ice river boat. It'll be fairly heavy. I have an iron block 5.3 LS which will have a single turbo. Power will be 450-500 hp depending on the boost. BTW, in another thread I saw a pic of your boat; it l...
by Dr.Dan
Sat Oct 03, 2015 11:11 pm
Forum: Automotive Power Only
Topic: Power to weight
Replies: 5
Views: 1096

Re: Power to weight

One thing to keep in mind is that the power of different engines can vary more than the weight. For example, a BBC can be an old iron headed stocker weighing about 685 lbs and making less than 300 hp, or it can be modified with aluminum heads and manifold and weigh less than 550 lbs and make three t...
by Dr.Dan
Sun Sep 27, 2015 7:13 pm
Forum: Automotive Power Only
Topic: AFR on an airboat?
Replies: 7
Views: 1189

Re: AFR on an airboat?

12.8-13 is not way rich. It's about right for full load WOT. It is a bit rich for low-load cruise but not enough to cause damage. I would certainly not tear down the motor just based on that number. If it's running poorly that's a different matter. For a car at cruise you could lean it out for impro...
by Dr.Dan
Sun Sep 27, 2015 1:33 pm
Forum: Automotive Power Only
Topic: AFR on an airboat?
Replies: 7
Views: 1189

Re: AFR on an airboat?

Is it a narrow band or wide band you're using?

In my experience the wideband is far superior for tuning. I never bother with a narrowband anymore.

12.8-13 seems reasonable to me. I'd run that. However, just as a disclaimer I'm experienced with drag racing, new to airboats.

dd
by Dr.Dan
Fri Sep 25, 2015 11:23 pm
Forum: Airboat Tech
Topic: Type of rivet for poly
Replies: 4
Views: 917

Re: Type of rivet for poly

Ok, thanks guys.

I definitely want them flush (or a bit recessed). I've read on here that it isn't necessary to cut the countersink in poly because it will sink in during bucking. Did you guys find this, or predrill the countersink?

dd
by Dr.Dan
Fri Sep 25, 2015 12:24 am
Forum: Airboat Tech
Topic: Type of rivet for poly
Replies: 4
Views: 917

Type of rivet for poly

Hey guys, I've done a search but still have questions about the type of rivet for attaching uhmw polymer. I know the size I need (fyi there's a pretty good app for iphone/ipad: RivetSizer). I'll be using AN426 countersunk head aluminum buck rivets. I'm planning on bucking them without countersinking...
by Dr.Dan
Wed Sep 23, 2015 2:06 pm
Forum: Automotive Power Only
Topic: Using a smaller crank pulley affect badly?
Replies: 13
Views: 1215

Re: Using a smaller crank pulley affect badly?

I would definitely start out with the smaller pulley below. See what your boost is at that level. It is likely that the waterpump and alternator will work well enough at the lower rpm. Guys underdrive accessory pulleys all the time to free up hp. Like you say, it'll be trial and error. Just err on t...
by Dr.Dan
Fri Sep 04, 2015 11:50 am
Forum: Airboat Tech
Topic: 10:1 compression on stock starter?
Replies: 18
Views: 1849

Re: 10:1 compression on stock starter?

As you mentioned, 10:1 is not super high. A stock sbc starter should turn that no problem. If it's super fresh and tight maybe that'll slow it down a bit. Wiring or ground could be contributing too. After you confirm the wiring is good, a high torque mini starter is a good idea anyway. A decent hita...
by Dr.Dan
Sun Jul 26, 2015 4:52 pm
Forum: Automotive Power Only
Topic: LS3 Oil Cooler / Oil Change
Replies: 15
Views: 1335

Re: LS3 Oil Cooler / Oil Change

My thoughts: 1. I would just leave the residual oil there. I don't think 1/2 quart will make any difference granted you're using a quality oil (synthetic) and reasonable change interval. 2. The orientation of the cooler is unlikely to affect cooling performance as long as there is no air bubbles. It...
by Dr.Dan
Thu Jul 02, 2015 4:10 pm
Forum: Airboat Talk
Topic: 4000 hp turbine airboat
Replies: 9
Views: 1973

Re: 4000 hp turbine airboat

At first I thought it was a toy/RC too. Obviously there are clear videos of the real thing, but this one looked funny. Looking at it again, I think it's legit but looks funny because it's filmed with a drone.

dd
by Dr.Dan
Thu Jul 02, 2015 2:11 am
Forum: Airboat Talk
Topic: Our Canadian Friends
Replies: 1
Views: 497

Re: Our Canadian Friends

Thanks!
by Dr.Dan
Tue Jun 30, 2015 8:57 pm
Forum: Airboat Talk
Topic: .035 stainless
Replies: 5
Views: 677

Re: .035 stainless

I use a plasma cutter, it works fine. If you have access to a shear that'll be ideal though.

dd
by Dr.Dan
Tue Jun 30, 2015 12:03 pm
Forum: Airboat Tech
Topic: Few questions on stainless rigging
Replies: 5
Views: 1048

Re: Few questions on stainless rigging

I haven't built the engine stand yet, but the boat I'm building will have 1", 0.120 wall 304 stainless tubing for the engine stand. With a decent design configuration and good tig welds it should be plenty strong. I'm using 304 because it's easy to get and nice to work with.

dd
by Dr.Dan
Sat Jun 20, 2015 2:26 pm
Forum: Automotive Power Only
Topic: TOOK OFF MSD BOX WILL OUR MSD DISTRIBUTER RUN WITH OUT IT ?
Replies: 3
Views: 840

Re: TOOK OFF MSD BOX WILL OUR MSD DISTRIBUTER RUN WITH OUT I

Is it a billet hei distributor?

I suggest looking up the msd manual for the distributor. They often have good wiring diagrams for multiple options for setup.

dd

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