Search found 865 matches

by CarMotorBarge
Mon Jul 15, 2019 6:42 am
Forum: Other Important News
Topic: Storm Area 51
Replies: 9
Views: 480

Re: Storm Area 51

That 540 must be making some HSP to turn a prop that big. :stirpot:
by CarMotorBarge
Sun Jun 30, 2019 9:41 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Been busy lately with work. Getting back to this thread. So I don't plan to spin 8000 RPMs. The max will be 7000 RPMs. Hopefully I will get a little more longevity out of this motor. :shock: The interesting thing is the LS7 comes from the factory with a 7000 RPM rev limit. The LS2 from the factory h...
by CarMotorBarge
Wed Jun 26, 2019 8:41 pm
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 2918

Re: The Game Changer

The cam is one part of getting the direct drive to respond and run like it does. Why would Water thunder give away his cam spec's? My engine idle at 650 rpm's. The cam lope goes away at 900 rpm... Propellers tip speed is your limit here, the longer the prop, the faster the tip speed at the same eng...
by CarMotorBarge
Wed Jun 26, 2019 12:28 pm
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 2918

Re: The Game Changer

Does anybody know the specs on the cam? :stirpot: :stirpot: I think everybody knows the answer to that.

So why do you think it was a radical cam? What RPM did it idle at?
by CarMotorBarge
Tue Jun 25, 2019 10:06 pm
Forum: Airboat Talk
Topic: The Game Changer
Replies: 41
Views: 2918

Re: The Game Changer

It is what it is...it aint a full racer, but it is a fun boat to ride, performs amazing well, snaps hard. Remember its about 20% displacement disadvantage to a 0 540 Those thrust numbers were on tester, not a boat.....No cage etc in the way. The 3 blade Alpha is the only prop we tested that work in...
by CarMotorBarge
Sun Jun 16, 2019 10:52 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Here is the latest on the LOW TORQUE LS Build. Got the main bearings installed: https://southernairboat.com/wp/wp-content/uploads/rtMedia/users/171/2019/06/0518192206-800x450.jpg Torqued the inner studs to 60 ft lbs and the outer studs to 50 ft lbs. The side bolts were torqued to 20 ft lbs. Next ste...
by CarMotorBarge
Sun Jun 16, 2019 10:40 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Figured I'd stir the pot, been a few days and I was enjoying this thread lol https://youtu.be/u-MH4sf5xkY That video does a great job of explaining the science. 8) All the BIG TORQUE guys need to watch that video. :shock: Now I will say that airboats are different from a car because an airboat can'...
by CarMotorBarge
Sun Jun 16, 2019 10:07 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 65
Views: 4052

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

I really didn't expect much useful input on engine mounts from a CM guy, don't ya'll call em motor mounts or something? Watch the whole thing for sure, always good for more laughs. But I think Ricky was talkin about gear box boats at 54 seconds on the timeline. :stirpot: :stirpot: https://youtu.be/...
by CarMotorBarge
Fri Jun 14, 2019 6:27 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 65
Views: 4052

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

You just need to bite the bullet and put a gearbox on that A/C motor. Just think of all the prop shaft torque that you could make with a gearbox. 8) A 1.5 ratio would increase the prop shaft torque by 50%. That is a game changer. :stirpot:
by CarMotorBarge
Thu Jun 06, 2019 6:55 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 65
Views: 4052

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

CMB, All good for me, a couple thoughts. Between #5 and #6 I say sure. I think you are sand bagging on #6. With 2.88 of gear your set up is gonna make more prop torque early on. The "Theory" that I am proposing is that thrust is going to be reasonably linear with the engine torque curve d...
by CarMotorBarge
Wed Jun 05, 2019 6:45 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Here are the main caps, main bearings and ARP main studs for the LOW TORQUE LS: https://southernairboat.com/wp/wp-content/uploads/rtMedia/users/171/2019/06/0518191605-800x450.jpg The main caps are stock LS main caps. Nothing special. P/N for the ARP main studs is 234-5608. Main studs are made from 8...
by CarMotorBarge
Wed Jun 05, 2019 6:33 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 65
Views: 4052

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

So we agree on items #1 thru #4. How about this for items #5 thru #9: 5. Measure on the thrust tester the time it takes to go from idle to 1000 foot lbs of thrust. If your BIG TORQUE A/C motor can't make 1000 foot lbs of thrust, we will drop to 900 foot lbs of thrust for the test. 6. Quickest time t...
by CarMotorBarge
Tue Jun 04, 2019 7:07 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Slidin Gator, You stated the following in other thread: "I certainly did, no doubt higher HP produces higher static thrust. Thrust needed is a function of the hull, friction and the load. I spot you top thrust king on the thrust tester vs. my 500 ft-lb motor. I am interested in the thrust respo...
by CarMotorBarge
Tue Jun 04, 2019 7:07 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 65
Views: 4052

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

Slidin Gator, You stated the following in other thread: "I certainly did, no doubt higher HP produces higher static thrust. Thrust needed is a function of the hull, friction and the load. I spot you top thrust king on the thrust tester vs. my 500 ft-lb motor. I am interested in the thrust respo...
by CarMotorBarge
Thu May 30, 2019 9:01 pm
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Here is an update. Got the LS2 block cleaned: https://southernairboat.com/wp/wp-content/uploads/rtMedia/users/171/2019/05/0518191330-800x450.jpg This is a used block. There was a plug along with sealant in the oil dipstick hole. I think it was run as a dry sump in a car. I plan to run it as a wet su...
by CarMotorBarge
Thu May 30, 2019 7:46 pm
Forum: Automotive Power Only
Topic: anyone running a 350 with 2.1 box?
Replies: 42
Views: 2362

Re: anyone running a 350 with 2.1 box?

HP makes thrust, not torque. I guess them gear boxes are just a scam and everyone needs to get rid of em. All they do is increase useless torque, add weight, lighten your wallets and waste that precious HP. Just all negatives it turns out. :scratch: Really? You know better brother.... Gear box just...
by CarMotorBarge
Mon May 20, 2019 7:06 am
Forum: Prop Talk
Topic: Prop VS Motor: Airgator, LS2 6.0, Sensenich NEED ADVICE
Replies: 34
Views: 1547

Re: Prop VS Motor: Airgator, LS2 6.0, Sensenich NEED ADVICE

I would also clean out the brand new tank after you get it. I have seen several brand new tanks with enough metal shavings in them to clog the filter. This happens more than people realize.
by CarMotorBarge
Fri May 17, 2019 5:45 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Yes, I was never planning to do a DD. Plan to run a 2.88 ratio with this motor and spin it.
by CarMotorBarge
Thu May 16, 2019 9:22 pm
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LOW TORQUE LS Engine Build

Here is the latest on the low torque LS build. Decided to use the following cylinder heads: https://www.texas-speed.com/p-7650-precision-race-components-aftermarket-ls3-as-cast-cylinder-heads.aspx Planning to get the stainless hollow stem intake valves with 0.660 dual springs. The intake runner is 2...
by CarMotorBarge
Tue May 14, 2019 2:19 pm
Forum: Airboat Talk
Topic: LS DD maiden voyage
Replies: 305
Views: 19355

Re: LS DD maiden voyage

Was that 427 LS on the dyno an LS3 or LS7?
by CarMotorBarge
Tue May 14, 2019 2:10 pm
Forum: Prop Talk
Topic: Prop VS Motor: Airgator, LS2 6.0, Sensenich NEED ADVICE
Replies: 34
Views: 1547

Re: Prop VS Motor: Airgator, LS2 6.0, Sensenich NEED ADVICE

It is also a good idea to install a wideband O2 sensor so that you can keep an eye on the AFR while you are driving.
by CarMotorBarge
Tue May 14, 2019 6:49 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LS LOW TORQUE Engine Build

Challenge heard and accepted, Game ON! We still need to negotiate the terms and the win/lose/draw basis, but I am in. Real busy with work this week, so I will just have to let this all fester until later. I will post my counter challenge later this week and we can all pick sides and start trash tal...
by CarMotorBarge
Tue May 14, 2019 6:43 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LS LOW TORQUE Engine Build

Msa4x4 wrote:Get you a ls3 block and throw a 4.8 crank in it. Should get you 8k rpm easy


I have a 5.3 cast iron block and a stock crank with a 3.622 inch stroke. Was thinking about doing a 5.3 build that spun to 7000 RPMs for an airboat build. Need to build and test the current build first. 8)
by CarMotorBarge
Tue May 14, 2019 6:41 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LS LOW TORQUE Engine Build

Thanks Kwan.
by CarMotorBarge
Mon May 13, 2019 9:29 pm
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 3743

Re: LS LOW TORQUE Engine Build

Kwan,

I need some Jedi wisdom to get the pictures to show the full size. 8) Can't see the entire part number on the LS2 block.

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