Remember prop tip weights have to match or they need to be rebalanced

With a 7' wide hull you don't have a lot of flat planning bottom and add to that the weight of BBC. Gaining 25-50 is great but losing weight would be better. BBC with iron heads is around 700lbs or more, aluminum ls 425lbs. Dropping 250lbs off the back of an airboat is huge specially with a narrow r...

Yes If you do some research there a lot of budget option for building a reliable motor. A lot of stock bottom end (SBE) motors running on airboats. LS1 tech Pirate 4x4 (the tech garage second) Hotrod, richard holdener, Junk yard search engine www.car-parts.com just need to know what the motor you wa...

I am sure any of the airboat shops would have one or try https://midwestcontrol.com/shop/

What he said. ^^^ Better be built correctly for more RPM then originally intended or it will not last long. If built right 1.77, 2.00, 2.09 or even 2.38. Cad Company and MTS (www.500cid.com) they have some basic information that can give you some insight. If you do have work do make sure the shop kn...

Swamp, I believe when it comes to woody's (fixed pitch ) it is Diameter, bolt pattern and the pitch number which is how far the prop moves forward it 1 turn with no slippage if am not mistaken. Remember props do bad thing when get close to the speed of sound so be careful just stating max rpm. They ...

There are a lot of variables when you go switching hulls and riggings to start making apples to apples comparison. My 2 cents would be motor as low as possible, prop back close transom (you used to see 3, 4, 5 and 6" prop adapters) to allow motor to be a little farther forward with prop still back b...

Welcome to the addiction That is a big boat for a DD but a lot of mullet fisherman is the gulf ran big boats with caddys I had a 15' x7-6 rivermaster with a 472 caddy bored .020 over and a few other upgrades always ran good Well there are 3 main prop manufacturers Sensenich Whirlwind Waterwalker All...

Radtech sent you a PM I run the gulf the majority of the time and have not had any issues. I do run a carb not EFI but that is going to change it the near future. I did put together an EFI boat for a buddy and it has been n the water for over 2 years. It runs the gulf as well. With an iron block ls ...

I ran a DD caddy for many years did great. Even rebuilt it and ran it again for a few more years. Sold it to a guys in Louisiana and it is still running today. Now it certainly wasn't a branch motor, but it did run very well. Not that I wouldn't used buddy I just like do stuff myself. There is a guy...

Went the last 2 sat. 2 weeks ago was very slow did hook a big tarpon back at the tree line, that lasted all on 5 seconds lol. Caught a few dinky reds. This past sat water is still dark as black coffee. We work the bars and points caught a few small snook, 1 29.5" and 1 20' red and a few nice sheephe...

I would be willing to bet Cary Eide can make you a custom radiator to fitand less expensive.
321.302.8456

Rich, Check out LS1tech.com Pirate4x4 the tech garage section I hate to says this but facebook Richard Holdener has done a bunch of testing with different combo's site Hot Rod has has tested 20 intakes and for what we do RPM wise the TBSS inake while ugly works very well up to about 5500rpm If your ...

I have put together 4 ls boat only 1 is EFI other 3 are carbed. All run great with somewhere around 400hp. They are all heavy gulf fishing rigs. 2 are 2.68 2 are 2.55 all have 80" 3 blade setup. both the 2.55 run Maximus blades not fast but push like a dozer. the 2.68 are both R blades great across ...

Look up Captain Dave Markett he has a facedbook page I believe he just put another customer on a big gator.

Under the aircraft section of this forum there are 0470 manuals.

Be sure you understand how the mags work before you mess the the prop by hand.

Call Whirlwind and see what they say always heard they have great custom service.

I run a 6.0 with a similar cam (more duration slightly less lift) and a little more compression. I have a 2.68 box and turn a 79.5 3 bld R 5400 set on mark 3. I have never run a whirlwind blade so not sure how they compare. I did set up a stock 6.0 with a 2.55 ratio 80' 3 bld and it runs great as we...

Sounds like the round sided airgator hull. Very narrow running bottom but a beast on the hill. I helped a buddy built a similar hull with 5.3 2.55 box and 80" maximus blades. It will run across anything but takes about 3800 or 4000 to be on plane if we are loaded down for fishing the gulf for a day....

I ran Sensenich R blades in a WW hub.

Send me a PM with your number and I will text you a few when I get home.

If your motor is using the 4 corner steam vent setup as early stock LS take the hose off the steam vent tube and fill it till you get water out of the tube. If it is blocked un-bolt the plug and do the same thing. I also added a piece SS tune inline with a fitting welded to it. It is the highest poi...

My old boss had a mild 454 (cam and work to stock heads) on a 15x8 alumitec, he turned a 80'" 3 blade K with a CH3 2:1 prop was set at 2. He had to run it 38-4000 to keep it on plane. Had 1/2 poly heavy rigging and cage live wells. Always seemed to struggle. Superwides are designed to turn slow usin...

Looks similar to a Bill Roberts box to me.

Maybe PCM runs a different thermostat. I thought stock LSA thermostat was 190 degrees. Codes are for adaptive learn and closed loop. Some systems will not run in closed loop without the motor being at the correct temp. Could be sensor or voltage or ground to sensor. Also if it is running learn it wi...