Search found 577 matches

by OneBFC
Tue Sep 17, 2019 5:00 pm
Forum: Prop Talk
Topic: BMW m57 engine for DD? Diesel.
Replies: 7
Views: 192

Re: BMW m57 engine for DD? Diesel.

It would be nice if you could find an engine making 500-600 ft pounds of torque at 3,000 rpm and make a strong direct drive. Not a fan of the engine and I doubt the weight claim, but, it is not too far from 500lbft at 3200rpm. Most props can handle that if you kept the diameter down. Just saying. A...
by OneBFC
Fri Sep 06, 2019 2:21 pm
Forum: Airboat Talk
Topic: Gearbox power reduction question
Replies: 13
Views: 464

Re: Gearbox power reduction question

With the 450 or so hp you think the engine is making (conservatively) the a 4 blade 80" R should work fine as long as its combined with the proper gear ratio to ensure your engine reaches the RPM it actually makes it's best power at. This is what JR is saying earlier. Likely your engine makes t...
by OneBFC
Wed Sep 04, 2019 5:55 pm
Forum: Airboat Talk
Topic: Air-Toon
Replies: 3
Views: 340

Re: Air-Toon

Honestly looks unsafe to operate, let alone as a rescue machine. I know you probably worked hard on it, but, that's my take away from that short video. Is this machine meant to be a superior alternative to a standard airboat design? If so, can you list what areas it surpasses the traditional methods...
by OneBFC
Tue Aug 13, 2019 6:34 am
Forum: Prop Talk
Topic: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R
Replies: 13
Views: 1377

Re: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R

Russ, What do you think about a wider hull? I read somewhere he has less than 4’ of planing bottom. Wouldn’t such a narrow hull require more power than an 8’ hull to keep on a plane? Absolutely. Though I am unaware of way to add beam to a boat after the hull has been built. Excellent point for anyo...
by OneBFC
Mon Aug 12, 2019 8:35 pm
Forum: Mini-Airboats
Topic: Honda CBR 600cc 10x6 Aluminum Airboat Build
Replies: 95
Views: 13291

Re: Honda CBR 600cc 10x6 Aluminum Airboat Build

swamper2 wrote:How do we lube the chain.


May not have to if use a modern chain. Ran ATV in Florida sand for years and years with zero lube. Adding lube killed their service life and ate up sprockets too.

I don't know what the owner is using, but, just a thought.
by OneBFC
Mon Aug 12, 2019 8:28 pm
Forum: Prop Talk
Topic: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R
Replies: 13
Views: 1377

Re: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R

Add a 4th blade and switch to more gear, not less. A 2.68 with 4 blades will likely get what you need and not have to give up on anything. Sure, adding pitch will of course lower cruise rpm. But you will lose max thrust more than likely. Will you lose too much? Only you can say that. So, your plan i...
by OneBFC
Sun Aug 11, 2019 12:33 pm
Forum: Prop Talk
Topic: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R
Replies: 13
Views: 1377

Re: Help Staying on plane. LS2 6.0, rotator 2.37, 80" Sensinich R

Congrats on getting your boat finished! Now, unfortunately, you are over estimating the amount of power your engine is producing by quite a bit. A 6.0 isn't going to make 500+hp at 5100 RPM. Let alone anywhere near 600. I would estimate in the 425 to 450 range at the crank but builds vary so your en...
by OneBFC
Mon Jul 29, 2019 5:17 pm
Forum: Automotive Power Only
Topic: ECOTEC 2.0 LTG SWAP
Replies: 134
Views: 6306

Re: ECOTEC 2.0 LTG SWAP

Don't think the PCM actually cares about low pressure side. It's basically a lift pump for the high pressure pump on these engines.

Here's a few pics with a cracker in the back seat. :cheers:

20190629_153312.jpg


20190705_163612-EFFECTS.jpg
by OneBFC
Sun Jul 28, 2019 6:29 pm
Forum: Automotive Power Only
Topic: ECOTEC 2.0 LTG SWAP
Replies: 134
Views: 6306

Re: ECOTEC 2.0 LTG SWAP

pedal is not an issue. Mine has been fully exposed since 2012 with plenty of time spent in some heavy rain both running and on the trailer. Works best with an in tank fuel pump. Can be the factory system that you use the FCM along with the PCM or just a standard 70 psi feed / return. I run factory s...
by OneBFC
Thu Jul 25, 2019 3:31 pm
Forum: Prop Talk
Topic: Whisper tip sw
Replies: 8
Views: 590

Re: Whisper tip sw

That exact prop, with a 4th blade instead of 3, 80 inches, 2.3 ratio was 12 degrees at tip @ 5200 rpm on my 122 ci engine when we tested it. I imagine your 502 with it's 388 extra inches should be able to achieve somewhere north of that. Given your using 3 instead of 4 blades. Maybe shoot for 15+ de...
by OneBFC
Fri Jul 12, 2019 10:31 pm
Forum: Automotive Power Only
Topic: B207R Ecotec 2.0 Turbo, Looking for help with ECM
Replies: 15
Views: 1093

Re: B207R Ecotec 2.0 Turbo, Looking for help with ECM

very similar to the LTG 2.0 It's not similar to LTG at all. It is similar to LSJ. Use an LSJ solution or run an aftermarket EFI from any place that supports an LSJ and you will be set. Use that as your request to others for help so you get the right help. Again, nothing at all like an LTG. Forget t...
by OneBFC
Thu Jul 04, 2019 7:13 pm
Forum: Automotive Power Only
Topic: B207R Ecotec 2.0 Turbo, Looking for help with ECM
Replies: 15
Views: 1093

Re: B207R Ecotec 2.0 Turbo, Looking for help with ECM

skinnypockets wrote:Russ, Thanks for the reply. Have you ever heard of Microsquirt?

:rebel: :florida: :old_glory:


Yes, been around for ages. Megasquirt / Micro squirt are all from same group.

Likely you can use since your engine is EFI. Just won't come with a harness.
by OneBFC
Thu Jul 04, 2019 5:34 pm
Forum: Automotive Power Only
Topic: B207R Ecotec 2.0 Turbo, Looking for help with ECM
Replies: 15
Views: 1093

Re: B207R Ecotec 2.0 Turbo, Looking for help with ECM

It's an LK9 engine and very similar to an LSJ. Look for LSJ options and you are likely to get what you need. Being EFI makes your electronics (PCM) options a lot more varied as there are countless EFI systems these days. https://en.m.wikipedia.org/wiki/GM_Ecotec_engine#LK9 I think your power goals f...
by OneBFC
Wed Jul 03, 2019 3:21 pm
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 4351

Re: LOW TORQUE LS Engine Build

You want a max rpm of 7k, but also want max HP at 7k too? This sounds terribad. Most of its use would then be way under the curve HP and then relying on a wimpy TQ curve. unless of course you intend to cruize at close to 7k. In that case, fuel wont last long and neither will the engine. Interesting...
by OneBFC
Fri Jun 28, 2019 11:27 am
Forum: Automotive Power Only
Topic: Ecotec 2.4 v/s 0360
Replies: 17
Views: 1299

Re: Ecotec 2.4 v/s 0360

Thanks for the input guys!! Russ that is one nice build! When I decide to start my build I’ll have more questions I’m sure. My build is going to based around reliability and fuel economy. I hunt in the swamps of Louisiana and we can be rough on boats down here, I need a boat that can take going ove...
by OneBFC
Thu Jun 27, 2019 1:09 pm
Forum: Automotive Power Only
Topic: Ecotec 2.4 v/s 0360
Replies: 17
Views: 1299

Re: Ecotec 2.4 v/s 0360

If you keep the 2.4 naturally aspirated then it compares well to a 360. It will make more static thrust due to the longer and slower prop, but the difference isn't massive. I wouldn't even bother comparing them that way. So, if that's your plan, then think of the 2.4 ecotec as a good running 360 and...
by OneBFC
Tue Jun 25, 2019 5:41 pm
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 3410

Re: The Game Changer

If those numbers are of a test run on a fully rigged boat vs engine on a stand with a prop on it, then that's good numbers for sure. Would be nice to have someone post a video of that test since a 66 inch blade prop is darn short to produce that with. Can tell you are all smiles about how it perform...
by OneBFC
Tue Jun 25, 2019 2:50 pm
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 3410

Re: The Game Changer

So is that one of the key elements to making a DD work, making the blades shorter so that you can spin it past 3K RPM? I always thought 3K RPM was the limit. http://www.epi-eng.com/propeller_technology/selecting_a_propeller.htm It's fairly simple yet complicated at the same time. Like all things ai...
by OneBFC
Tue Jun 25, 2019 11:57 am
Forum: Airboat Talk
Topic: Gear Box or Not
Replies: 24
Views: 1894

Re: Gear Box or Not

Old timers didnt run barges...lol And they ran light boats with aircraft engines, which is old technology that will do what you’re asking. Formula for success never changes. 6lbs of boat to 1hp and you will have an adequate performance experience. move that to 4lbs per 1hp and it's a do all machine...
by OneBFC
Mon Jun 24, 2019 11:24 am
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 3410

Re: The Game Changer

So funny, this is exactly what a proper ecotec boat feels like and peoples reaction to is when they drive one. The ecotec makes a few hundred pounds more thrust though. Good to hear the LS DD is working well. I like the platform and hope to see more of it around. Always things that can be improved, ...
by OneBFC
Tue Jun 18, 2019 8:42 pm
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 76
Views: 5134

Re: I'm Building 2 Stossel Boats with High Torque Motors

Since we are posting weights.... IMG_20190304_161440.jpg click picture and zoom in to barely see weight. it reads 454lb. full of oil, with ox drive, engine mounts, wire harness, ecm, catch can, radiator overflow tank, adapter plate and big turbo with steel center section. add 20 for radiator and mis...
by OneBFC
Tue Jun 11, 2019 6:49 pm
Forum: Airboat Safety
Topic: navigation gps
Replies: 12
Views: 1083

Re: navigation gps

Polaris GPS (android device, free, no network required)

Google Maps (no network or cell required if you download the maps for the area you run)
by OneBFC
Thu Jun 06, 2019 7:45 pm
Forum: Prop Talk
Topic: New prop help
Replies: 15
Views: 1261

Re: New prop help

I have 16x8 Alumitech 3’ rake full deck over setup for bowfishing( lights, generator, front steer) 1/2 ploy bottom, its heavy. The boat and tandem axle aluminum trailer weight 4780lbs, 3/4 tank of gas. It has a 509 BBC edelbrock heads with sniper efi, roller rockers, ch-3 2.3to1 that about all i kn...
by OneBFC
Mon Jun 03, 2019 10:22 pm
Forum: Automotive Power Only
Topic: anyone running a 350 with 2.1 box?
Replies: 42
Views: 2927

Re: anyone running a 350 with 2.1 box?

Consensus is get another 350 motor with a 2:1 for cheap and get on with it?


Yep, I agree. No messing with rigging or any other cans of worms when you go changing stuff.

Done and back to sliding.
by OneBFC
Sat Jun 01, 2019 3:49 pm
Forum: Automotive Power Only
Topic: anyone running a 350 with 2.1 box?
Replies: 42
Views: 2927

Re: anyone running a 350 with 2.1 box?

I am sure the ecotec sales person will or would be devastated? LS engine comparison is far and away even more obvious which is better from a performance perspective.

I am not selling anything but knowledge.

Use it how you wish. Not meant any other way.

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